From e81bf33d3ce435c2d29333aebaa437fc734d6d0a Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Wed, 16 Oct 2024 17:17:06 +0900
Subject: [PATCH 01/33] =?UTF-8?q?docs:=20=EA=B8=B0=EB=8A=A5=20=EA=B5=AC?=
 =?UTF-8?q?=ED=98=84=20=EB=AA=A9=EB=A1=9D=20=EC=9E=91=EC=84=B1?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md | 46 +++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 45 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index bd90ef024..ba2d8984a 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,45 @@
-# java-calculator-precourse
\ No newline at end of file
+# java-calculator-precourse
+## 기능 구현 목록
+입력한 문자열에서 숫자를 추출하여 더하는 계산기를 구현한다.
+
+### 입력
+- [ ] 유저의 입력을 전달한다.
+
+### 입력값 검사기
+- 커스텀 구분자가 있는 입력일 때
+    - [ ] 커스텀 구분자가 `//`로 시작해 `\n`가 포함되는지 확인한다.
+    - [ ] 커스텀 구분자가 길이가 1이 아니라면 예외 처리한다.
+    - [ ] 커스텀 구분자가 숫자라면 예외 처리한다.
+    - [ ] 커스텀 구분자가 실수를 표현하는 `.`라면 예외 처리한다.
+    - [ ] 커스텀 구분자가 기본 구분자라면 예외 처리 한다.
+
+
+- 커스텀 구분자가 없을 입력일 때
+    - [ ] 입력값이 숫자로 시작하는 지 확인한다.
+
+
+- 공통
+    - [ ] 커스텀 구분자를 입력하려는지 확인한다.
+    - [ ] 음수가 입력되었다면 예외 처리 한다.
+    - [ ] 입력값이 출력 범위를 초과한다면 예외 처리한다. (int, float)
+    - [ ] 더한 값이 출력 범위를 초과한다면 예외 처리한다. (long, double)
+    - [ ] 구분자, `.`, 숫자 외 문자가 검출 된다면 예외 처리한다.
+
+### 구분자 관리
+- [ ] 기본 구분자 외 커스텀 구분자를 전달받아 추가한다.
+- [ ] 전달받은 구분자가 기본 구분자인지 확인한다.
+- [ ] 구분자를 넘겨준다.
+
+### 문자열 핸들러
+- [ ] 커스텀 구분자를 선언한다면 분리한다.
+- [ ] 분리한 커스텀 구분자를 넘겨준다.
+- [ ] 전달받은 구분자로 입력받은 문자열을 분리한다.
+- [ ] 분리한 문자를 넘겨준다.
+
+### 덧셈기
+- [ ] 전달 받은 값을 더해 저장한다.
+- [ ] 저장한 결과 값을 전달한다.
+
+### 출력
+- [ ] 시작 메세지를 출력한다.
+- [ ] 결과값을 출력한다.
\ No newline at end of file

From 20471724c2d693b93e2db06e5087f28e42758dbd Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Wed, 16 Oct 2024 17:18:31 +0900
Subject: [PATCH 02/33] =?UTF-8?q?feat(Input):=20=EC=9C=A0=EC=A0=80=20?=
 =?UTF-8?q?=EC=9E=85=EB=A0=A5=20=EB=B0=9B=EB=8A=94=20=EA=B8=B0=EB=8A=A5=20?=
 =?UTF-8?q?=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                           | 2 +-
 src/main/java/calculator/Input.java | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/calculator/Input.java

diff --git a/README.md b/README.md
index ba2d8984a..fefb7b3bf 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 입력한 문자열에서 숫자를 추출하여 더하는 계산기를 구현한다.
 
 ### 입력
-- [ ] 유저의 입력을 전달한다.
+- [X] 유저의 입력을 전달한다.
 
 ### 입력값 검사기
 - 커스텀 구분자가 있는 입력일 때
diff --git a/src/main/java/calculator/Input.java b/src/main/java/calculator/Input.java
new file mode 100644
index 000000000..2476bdead
--- /dev/null
+++ b/src/main/java/calculator/Input.java
@@ -0,0 +1,9 @@
+package calculator;
+
+import camp.nextstep.edu.missionutils.Console;
+
+public class Input {
+    public String readInput() {
+        return Console.readLine();
+    }
+}

From d6b8224a1638216a4d2d7ae42b17c41f31186114 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Wed, 16 Oct 2024 17:29:16 +0900
Subject: [PATCH 03/33] =?UTF-8?q?feat(Validator):=20=EC=BB=A4=EC=8A=A4?=
 =?UTF-8?q?=ED=85=80=20=EA=B5=AC=EB=B6=84=EC=9E=90=EC=9D=98=20=ED=8F=AC?=
 =?UTF-8?q?=ED=95=A8=20=ED=99=95=EC=9D=B8=20=EA=B8=B0=EB=8A=A5=20=EA=B5=AC?=
 =?UTF-8?q?=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                                   |  4 ++--
 src/main/java/calculator/Validator.java     |  7 +++++++
 src/test/java/calculator/ValidatorTest.java | 20 ++++++++++++++++++++
 3 files changed, 29 insertions(+), 2 deletions(-)
 create mode 100644 src/main/java/calculator/Validator.java
 create mode 100644 src/test/java/calculator/ValidatorTest.java

diff --git a/README.md b/README.md
index fefb7b3bf..519445f80 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 
 ### 입력값 검사기
 - 커스텀 구분자가 있는 입력일 때
-    - [ ] 커스텀 구분자가 `//`로 시작해 `\n`가 포함되는지 확인한다.
+    - [X] 커스텀 구분자가 `//`로 시작해 `\n`가 포함되는지 확인한다.
     - [ ] 커스텀 구분자가 길이가 1이 아니라면 예외 처리한다.
     - [ ] 커스텀 구분자가 숫자라면 예외 처리한다.
     - [ ] 커스텀 구분자가 실수를 표현하는 `.`라면 예외 처리한다.
@@ -19,7 +19,7 @@
 
 
 - 공통
-    - [ ] 커스텀 구분자를 입력하려는지 확인한다.
+    - [X] 커스텀 구분자를 입력하려는지 확인한다.
     - [ ] 음수가 입력되었다면 예외 처리 한다.
     - [ ] 입력값이 출력 범위를 초과한다면 예외 처리한다. (int, float)
     - [ ] 더한 값이 출력 범위를 초과한다면 예외 처리한다. (long, double)
diff --git a/src/main/java/calculator/Validator.java b/src/main/java/calculator/Validator.java
new file mode 100644
index 000000000..26741ea38
--- /dev/null
+++ b/src/main/java/calculator/Validator.java
@@ -0,0 +1,7 @@
+package calculator;
+
+public class Validator {
+    public boolean hasCustomSeparator(String input) {
+        return input.startsWith("//") && input.contains("\n");
+    }
+}
diff --git a/src/test/java/calculator/ValidatorTest.java b/src/test/java/calculator/ValidatorTest.java
new file mode 100644
index 000000000..c53ce11dd
--- /dev/null
+++ b/src/test/java/calculator/ValidatorTest.java
@@ -0,0 +1,20 @@
+package calculator;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+
+import org.junit.jupiter.api.Test;
+
+class ValidatorTest {
+    Validator validator = new Validator();
+
+    @Test
+    void 커스텀_구분자의_포맷이_올바르면_True_반환() {
+        assertTrue(validator.hasCustomSeparator("//;\n1;2;3"));
+    }
+
+    @Test
+    void 커스텀_구분자가_없다면_False_반환() {
+        assertFalse(validator.hasCustomSeparator("1:2:3"));
+    }
+}
\ No newline at end of file

From 54a553d4b4cc442c979a8b6e10e420861c27f26b Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Wed, 16 Oct 2024 17:39:06 +0900
Subject: [PATCH 04/33] =?UTF-8?q?feat(Validator):=20=EC=8B=9C=EC=9E=91?=
 =?UTF-8?q?=EA=B0=92=EC=9D=B4=20=EC=88=AB=EC=9E=90=EC=9D=B8=EC=A7=80=20?=
 =?UTF-8?q?=ED=8C=90=EB=B3=84=20=EA=B8=B0=EB=8A=A5=20=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                                   |  2 +-
 src/main/java/calculator/Validator.java     |  4 ++++
 src/test/java/calculator/ValidatorTest.java | 10 ++++++++++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 519445f80..32a1b3fc6 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@
 
 
 - 커스텀 구분자가 없을 입력일 때
-    - [ ] 입력값이 숫자로 시작하는 지 확인한다.
+    - [X] 입력값이 숫자로 시작하는 지 확인한다.
 
 
 - 공통
diff --git a/src/main/java/calculator/Validator.java b/src/main/java/calculator/Validator.java
index 26741ea38..0a4cfff2a 100644
--- a/src/main/java/calculator/Validator.java
+++ b/src/main/java/calculator/Validator.java
@@ -4,4 +4,8 @@ public class Validator {
     public boolean hasCustomSeparator(String input) {
         return input.startsWith("//") && input.contains("\n");
     }
+
+    public boolean isStartWithDigit(String input) {
+        return Character.isDigit(input.charAt(0));
+    }
 }
diff --git a/src/test/java/calculator/ValidatorTest.java b/src/test/java/calculator/ValidatorTest.java
index c53ce11dd..26d7138d4 100644
--- a/src/test/java/calculator/ValidatorTest.java
+++ b/src/test/java/calculator/ValidatorTest.java
@@ -17,4 +17,14 @@ class ValidatorTest {
     void 커스텀_구분자가_없다면_False_반환() {
         assertFalse(validator.hasCustomSeparator("1:2:3"));
     }
+
+    @Test
+    void 숫자로_시작한다면_True_반환() {
+        assertTrue(validator.isStartWithDigit("1;2;3"));
+    }
+
+    @Test
+    void 숫자로_시작하지_않으면_False_반환() {
+        assertFalse(validator.isStartWithDigit("//;\n"));
+    }
 }
\ No newline at end of file

From e482abc52ce494bf7656ed1ea714c845fe710530 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Wed, 16 Oct 2024 18:09:33 +0900
Subject: [PATCH 05/33] =?UTF-8?q?feat(SeparatorManager):=20=EA=B5=AC?=
 =?UTF-8?q?=EB=B6=84=EC=9E=90=EA=B0=80=20=EC=9D=B4=EB=AF=B8=20=EC=84=A0?=
 =?UTF-8?q?=EC=96=B8=20=EB=90=98=EC=97=88=EB=8A=94=EC=A7=80=20=ED=99=95?=
 =?UTF-8?q?=EC=9D=B8=20=EA=B8=B0=EB=8A=A5=20=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                                     |  2 +-
 .../java/calculator/SepartorMananger.java     | 17 +++++++++++++++
 .../java/calculator/SepartorManangerTest.java | 21 +++++++++++++++++++
 3 files changed, 39 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/calculator/SepartorMananger.java
 create mode 100644 src/test/java/calculator/SepartorManangerTest.java

diff --git a/README.md b/README.md
index 32a1b3fc6..00292c804 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@
 
 ### 구분자 관리
 - [ ] 기본 구분자 외 커스텀 구분자를 전달받아 추가한다.
-- [ ] 전달받은 구분자가 기본 구분자인지 확인한다.
+- [X] 전달받은 구분자가 기본(이미 존재하는지) 구분자인지 확인한다.
 - [ ] 구분자를 넘겨준다.
 
 ### 문자열 핸들러
diff --git a/src/main/java/calculator/SepartorMananger.java b/src/main/java/calculator/SepartorMananger.java
new file mode 100644
index 000000000..568aa0d56
--- /dev/null
+++ b/src/main/java/calculator/SepartorMananger.java
@@ -0,0 +1,17 @@
+package calculator;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class SepartorMananger {
+    List<String> separators;
+
+    public SepartorMananger() {
+        this.separators = new ArrayList<>(Arrays.asList(",", ":"));
+    }
+
+    public boolean exists(String separator) {
+        return separators.contains(separator);
+    }
+}
diff --git a/src/test/java/calculator/SepartorManangerTest.java b/src/test/java/calculator/SepartorManangerTest.java
new file mode 100644
index 000000000..1da588e18
--- /dev/null
+++ b/src/test/java/calculator/SepartorManangerTest.java
@@ -0,0 +1,21 @@
+package calculator;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+
+import org.junit.jupiter.api.Test;
+
+class SepartorManangerTest {
+    SepartorMananger separtorMananger = new SepartorMananger();
+
+    @Test
+    void 이미_있는_구분자라면_True_반환() {
+        assertTrue(separtorMananger.exists(":"));
+    }
+
+    @Test
+    void 없는_구분자라면_False_반환() {
+        assertFalse(separtorMananger.exists("!"));
+    }
+
+}
\ No newline at end of file

From bbe1a9b7115501bcc866c38c1369ac66a20acbcc Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Wed, 16 Oct 2024 18:12:25 +0900
Subject: [PATCH 06/33] =?UTF-8?q?feat(SeparatorManager):=20=EA=B5=AC?=
 =?UTF-8?q?=EB=B6=84=EC=9E=90=20=EC=B6=94=EA=B0=80=20=EA=B8=B0=EB=8A=A5=20?=
 =?UTF-8?q?=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                                      | 2 +-
 src/main/java/calculator/SepartorMananger.java | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 00292c804..02caa6c8f 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@
     - [ ] 구분자, `.`, 숫자 외 문자가 검출 된다면 예외 처리한다.
 
 ### 구분자 관리
-- [ ] 기본 구분자 외 커스텀 구분자를 전달받아 추가한다.
+- [X] 기본 구분자 외 커스텀 구분자를 전달받아 추가한다.
 - [X] 전달받은 구분자가 기본(이미 존재하는지) 구분자인지 확인한다.
 - [ ] 구분자를 넘겨준다.
 
diff --git a/src/main/java/calculator/SepartorMananger.java b/src/main/java/calculator/SepartorMananger.java
index 568aa0d56..d879ea3ac 100644
--- a/src/main/java/calculator/SepartorMananger.java
+++ b/src/main/java/calculator/SepartorMananger.java
@@ -14,4 +14,8 @@ public SepartorMananger() {
     public boolean exists(String separator) {
         return separators.contains(separator);
     }
+
+    public void add(String separator) {
+        separators.add(separator);
+    }
 }

From 34ab00fd9863db6dbe9fd24f3f1110473e6fa19a Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Thu, 17 Oct 2024 12:48:42 +0900
Subject: [PATCH 07/33] =?UTF-8?q?feat(SeparatorManager):=20=EC=88=98?=
 =?UTF-8?q?=EC=A0=95=20=EB=B6=88=EA=B0=80=ED=95=9C=20=EA=B5=AC=EB=B6=84?=
 =?UTF-8?q?=EC=9E=90=20=EB=A6=AC=EC=8A=A4=ED=8A=B8=20=EC=A0=84=EB=8B=AC=20?=
 =?UTF-8?q?=EA=B8=B0=EB=8A=A5=20=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                                          | 2 +-
 src/main/java/calculator/SepartorMananger.java     | 5 +++++
 src/test/java/calculator/SepartorManangerTest.java | 7 +++++++
 3 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 02caa6c8f..bf2cb9449 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@
 ### 구분자 관리
 - [X] 기본 구분자 외 커스텀 구분자를 전달받아 추가한다.
 - [X] 전달받은 구분자가 기본(이미 존재하는지) 구분자인지 확인한다.
-- [ ] 구분자를 넘겨준다.
+- [X] 구분자를 넘겨준다.
 
 ### 문자열 핸들러
 - [ ] 커스텀 구분자를 선언한다면 분리한다.
diff --git a/src/main/java/calculator/SepartorMananger.java b/src/main/java/calculator/SepartorMananger.java
index d879ea3ac..0661d481d 100644
--- a/src/main/java/calculator/SepartorMananger.java
+++ b/src/main/java/calculator/SepartorMananger.java
@@ -2,6 +2,7 @@
 
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.List;
 
 public class SepartorMananger {
@@ -18,4 +19,8 @@ public boolean exists(String separator) {
     public void add(String separator) {
         separators.add(separator);
     }
+
+    public List<String> getSeparators() {
+        return Collections.unmodifiableList(separators);
+    }
 }
diff --git a/src/test/java/calculator/SepartorManangerTest.java b/src/test/java/calculator/SepartorManangerTest.java
index 1da588e18..4a9eda8e1 100644
--- a/src/test/java/calculator/SepartorManangerTest.java
+++ b/src/test/java/calculator/SepartorManangerTest.java
@@ -1,8 +1,10 @@
 package calculator;
 
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 
+import java.util.List;
 import org.junit.jupiter.api.Test;
 
 class SepartorManangerTest {
@@ -18,4 +20,9 @@ class SepartorManangerTest {
         assertFalse(separtorMananger.exists("!"));
     }
 
+    @Test
+    void 받은_구분자_리스트의_수정_불가한지_확인() {
+        assertThatThrownBy(() -> separtorMananger.getSeparators().remove(0))
+                .isInstanceOf(UnsupportedOperationException.class);
+    }
 }
\ No newline at end of file

From 5d7cf6552e7f19a37118446f58ac56f75dacba8f Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Thu, 17 Oct 2024 12:50:58 +0900
Subject: [PATCH 08/33] =?UTF-8?q?chore:=20SeparatorManager=20=EC=98=A4?=
 =?UTF-8?q?=ED=83=80=20=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../{SepartorMananger.java => SeparatorManager.java}  |  4 ++--
 src/test/java/calculator/SepartorManangerTest.java    | 11 +++++------
 2 files changed, 7 insertions(+), 8 deletions(-)
 rename src/main/java/calculator/{SepartorMananger.java => SeparatorManager.java} (89%)

diff --git a/src/main/java/calculator/SepartorMananger.java b/src/main/java/calculator/SeparatorManager.java
similarity index 89%
rename from src/main/java/calculator/SepartorMananger.java
rename to src/main/java/calculator/SeparatorManager.java
index 0661d481d..5a5584c02 100644
--- a/src/main/java/calculator/SepartorMananger.java
+++ b/src/main/java/calculator/SeparatorManager.java
@@ -5,10 +5,10 @@
 import java.util.Collections;
 import java.util.List;
 
-public class SepartorMananger {
+public class SeparatorManager {
     List<String> separators;
 
-    public SepartorMananger() {
+    public SeparatorManager() {
         this.separators = new ArrayList<>(Arrays.asList(",", ":"));
     }
 
diff --git a/src/test/java/calculator/SepartorManangerTest.java b/src/test/java/calculator/SepartorManangerTest.java
index 4a9eda8e1..f862cf380 100644
--- a/src/test/java/calculator/SepartorManangerTest.java
+++ b/src/test/java/calculator/SepartorManangerTest.java
@@ -4,25 +4,24 @@
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 
-import java.util.List;
 import org.junit.jupiter.api.Test;
 
-class SepartorManangerTest {
-    SepartorMananger separtorMananger = new SepartorMananger();
+class SeparatorManangerTest {
+    SeparatorManager separatorManager = new SeparatorManager();
 
     @Test
     void 이미_있는_구분자라면_True_반환() {
-        assertTrue(separtorMananger.exists(":"));
+        assertTrue(separatorManager.exists(":"));
     }
 
     @Test
     void 없는_구분자라면_False_반환() {
-        assertFalse(separtorMananger.exists("!"));
+        assertFalse(separatorManager.exists("!"));
     }
 
     @Test
     void 받은_구분자_리스트의_수정_불가한지_확인() {
-        assertThatThrownBy(() -> separtorMananger.getSeparators().remove(0))
+        assertThatThrownBy(() -> separatorManager.getSeparators().remove(0))
                 .isInstanceOf(UnsupportedOperationException.class);
     }
 }
\ No newline at end of file

From 05084c08230d7148f9b6df6114f27b6e233dfb07 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Thu, 17 Oct 2024 14:41:20 +0900
Subject: [PATCH 09/33] =?UTF-8?q?feat(StringHandler):=20=EC=BB=A4=EC=8A=A4?=
 =?UTF-8?q?=ED=85=80=20=EA=B5=AC=EB=B6=84=EC=9E=90=20=EB=B6=84=EB=A6=AC?=
 =?UTF-8?q?=ED=95=B4=EC=84=9C=20=EB=84=98=EA=B2=A8=EC=A3=BC=EB=8A=94=20?=
 =?UTF-8?q?=EA=B8=B0=EB=8A=A5=20=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                                      |  4 ++--
 src/main/java/calculator/StringHandler.java    | 13 +++++++++++++
 .../java/calculator/StringHandlerTest.java     | 18 ++++++++++++++++++
 3 files changed, 33 insertions(+), 2 deletions(-)
 create mode 100644 src/main/java/calculator/StringHandler.java
 create mode 100644 src/test/java/calculator/StringHandlerTest.java

diff --git a/README.md b/README.md
index bf2cb9449..7cb242112 100644
--- a/README.md
+++ b/README.md
@@ -31,8 +31,8 @@
 - [X] 구분자를 넘겨준다.
 
 ### 문자열 핸들러
-- [ ] 커스텀 구분자를 선언한다면 분리한다.
-- [ ] 분리한 커스텀 구분자를 넘겨준다.
+- [X] 커스텀 구분자를 선언한다면 분리한다.
+- [X] 분리한 커스텀 구분자를 넘겨준다.
 - [ ] 전달받은 구분자로 입력받은 문자열을 분리한다.
 - [ ] 분리한 문자를 넘겨준다.
 
diff --git a/src/main/java/calculator/StringHandler.java b/src/main/java/calculator/StringHandler.java
new file mode 100644
index 000000000..fef7d95fb
--- /dev/null
+++ b/src/main/java/calculator/StringHandler.java
@@ -0,0 +1,13 @@
+package calculator;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class StringHandler {
+    public String extractSeparator(String input) {
+        int start = input.indexOf("//") + 2;
+        int end = input.indexOf("\n");
+        return input.substring(start, end);
+    }
+}
diff --git a/src/test/java/calculator/StringHandlerTest.java b/src/test/java/calculator/StringHandlerTest.java
new file mode 100644
index 000000000..6a150723a
--- /dev/null
+++ b/src/test/java/calculator/StringHandlerTest.java
@@ -0,0 +1,18 @@
+package calculator;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import org.junit.jupiter.api.Test;
+
+class StringHandlerTest {
+    StringHandler handler = new StringHandler();
+
+    @Test
+    void 커스텀구분자만_리턴하는지_확인() {
+        assertEquals("@",
+                handler.extractSeparator("//@\n1@2@3"));
+    }
+}
\ No newline at end of file

From 85820c0de8d676ca1c9aff570b52bb41a7af17b2 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Thu, 17 Oct 2024 14:44:21 +0900
Subject: [PATCH 10/33] =?UTF-8?q?feat(StringHandler):=20=EC=9E=85=EB=A0=A5?=
 =?UTF-8?q?=20=EA=B0=92=EC=97=90=EC=84=9C=20=EA=B5=AC=EB=B6=84=EC=9E=90?=
 =?UTF-8?q?=EB=A7=8C=20=EC=A0=9C=EA=B1=B0=ED=95=98=EB=8A=94=20=EA=B8=B0?=
 =?UTF-8?q?=EB=8A=A5=20=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                                       | 2 +-
 src/main/java/calculator/StringHandler.java     | 6 ++++++
 src/test/java/calculator/StringHandlerTest.java | 8 ++++++++
 3 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 7cb242112..a8a43d3c9 100644
--- a/README.md
+++ b/README.md
@@ -33,7 +33,7 @@
 ### 문자열 핸들러
 - [X] 커스텀 구분자를 선언한다면 분리한다.
 - [X] 분리한 커스텀 구분자를 넘겨준다.
-- [ ] 전달받은 구분자로 입력받은 문자열을 분리한다.
+- [X] 전달받은 구분자로 입력받은 문자열을 분리한다.
 - [ ] 분리한 문자를 넘겨준다.
 
 ### 덧셈기
diff --git a/src/main/java/calculator/StringHandler.java b/src/main/java/calculator/StringHandler.java
index fef7d95fb..a1ef9ae35 100644
--- a/src/main/java/calculator/StringHandler.java
+++ b/src/main/java/calculator/StringHandler.java
@@ -10,4 +10,10 @@ public String extractSeparator(String input) {
         int end = input.indexOf("\n");
         return input.substring(start, end);
     }
+
+    public List<String> getNumbers(List<String> separators, String input) {
+        List<String> splitInput = new ArrayList<>(Arrays.asList(input.split("")));
+        splitInput.removeAll(separators);
+        return splitInput;
+    }
 }
diff --git a/src/test/java/calculator/StringHandlerTest.java b/src/test/java/calculator/StringHandlerTest.java
index 6a150723a..046f07241 100644
--- a/src/test/java/calculator/StringHandlerTest.java
+++ b/src/test/java/calculator/StringHandlerTest.java
@@ -9,10 +9,18 @@
 
 class StringHandlerTest {
     StringHandler handler = new StringHandler();
+    SeparatorManager separatorManager = new SeparatorManager();
 
     @Test
     void 커스텀구분자만_리턴하는지_확인() {
         assertEquals("@",
                 handler.extractSeparator("//@\n1@2@3"));
     }
+
+
+    @Test
+    void 숫자만_반환하는지_확인() {
+        assertEquals(List.of("1", "2", "3", "4"),
+                handler.getNumbers(separatorManager.getSeparators(), "1:2,3"));
+    }
 }
\ No newline at end of file

From 3db0f0805c676dbd852de78000362e36d296acbd Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Thu, 17 Oct 2024 16:20:28 +0900
Subject: [PATCH 11/33] =?UTF-8?q?feat(Adder):=20=EC=A0=84=EB=8B=AC=20?=
 =?UTF-8?q?=EB=B0=9B=EC=9D=80=20=EA=B0=92=EC=9D=84=20=EB=8D=94=ED=95=98?=
 =?UTF-8?q?=EB=8A=94=20=EA=B8=B0=EB=8A=A5=20=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                               |  2 +-
 src/main/java/calculator/Adder.java     | 17 +++++++++++++++++
 src/test/java/calculator/AdderTest.java | 16 ++++++++++++++++
 3 files changed, 34 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/calculator/Adder.java
 create mode 100644 src/test/java/calculator/AdderTest.java

diff --git a/README.md b/README.md
index a8a43d3c9..71f67cb7c 100644
--- a/README.md
+++ b/README.md
@@ -37,7 +37,7 @@
 - [ ] 분리한 문자를 넘겨준다.
 
 ### 덧셈기
-- [ ] 전달 받은 값을 더해 저장한다.
+- [X] 전달 받은 값을 더해 저장한다.
 - [ ] 저장한 결과 값을 전달한다.
 
 ### 출력
diff --git a/src/main/java/calculator/Adder.java b/src/main/java/calculator/Adder.java
new file mode 100644
index 000000000..d9aa9bab2
--- /dev/null
+++ b/src/main/java/calculator/Adder.java
@@ -0,0 +1,17 @@
+package calculator;
+
+import java.util.List;
+
+public class Adder {
+    int answer;
+
+    public void add(List<String> numbers) {
+        answer = 0;
+        for (String number: numbers) {
+            if (number.isBlank()) {
+                continue;
+            }
+            answer += Integer.parseInt(number);
+        }
+    }
+}
diff --git a/src/test/java/calculator/AdderTest.java b/src/test/java/calculator/AdderTest.java
new file mode 100644
index 000000000..b41249fbe
--- /dev/null
+++ b/src/test/java/calculator/AdderTest.java
@@ -0,0 +1,16 @@
+package calculator;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import java.util.List;
+import org.junit.jupiter.api.Test;
+
+class AdderTest {
+    Adder adder = new Adder();
+
+    @Test
+    void 공백일때_0을_return_하는지() {
+        adder.add(List.of(""));
+        assertEquals(0, adder.getAnswer());
+    }
+}
\ No newline at end of file

From 685a57a139b0b078a804459f4143a4fcdc164e70 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Thu, 17 Oct 2024 16:23:42 +0900
Subject: [PATCH 12/33] =?UTF-8?q?feat(Adder):=20=EA=B2=B0=EA=B3=BC?=
 =?UTF-8?q?=EA=B0=92=20=EC=A0=84=EB=8B=AC=20=EA=B8=B0=EB=8A=A5=20=EA=B5=AC?=
 =?UTF-8?q?=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                           | 2 +-
 src/main/java/calculator/Adder.java | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 71f67cb7c..5c8a4ef14 100644
--- a/README.md
+++ b/README.md
@@ -38,7 +38,7 @@
 
 ### 덧셈기
 - [X] 전달 받은 값을 더해 저장한다.
-- [ ] 저장한 결과 값을 전달한다.
+- [X] 저장한 결과 값을 전달한다.
 
 ### 출력
 - [ ] 시작 메세지를 출력한다.
diff --git a/src/main/java/calculator/Adder.java b/src/main/java/calculator/Adder.java
index d9aa9bab2..eb3669a64 100644
--- a/src/main/java/calculator/Adder.java
+++ b/src/main/java/calculator/Adder.java
@@ -14,4 +14,8 @@ public void add(List<String> numbers) {
             answer += Integer.parseInt(number);
         }
     }
+
+    public int getAnswer() {
+        return answer;
+    }
 }

From 987c91cfe686bcffa413f33cc8fbc598d399ec21 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Thu, 17 Oct 2024 17:08:07 +0900
Subject: [PATCH 13/33] =?UTF-8?q?feat(Validator):=20=EC=BB=A4=EC=8A=A4?=
 =?UTF-8?q?=ED=85=80=20=EA=B5=AC=EB=B6=84=EC=9E=90=EC=97=90=20=EB=8C=80?=
 =?UTF-8?q?=ED=95=9C=20=EC=98=88=EC=99=B8=EC=B2=98=EB=A6=AC=20=EA=B5=AC?=
 =?UTF-8?q?=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                               |  8 ++++----
 src/main/java/calculator/Validator.java | 15 +++++++++++++++
 2 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 5c8a4ef14..a43573dce 100644
--- a/README.md
+++ b/README.md
@@ -8,10 +8,10 @@
 ### 입력값 검사기
 - 커스텀 구분자가 있는 입력일 때
     - [X] 커스텀 구분자가 `//`로 시작해 `\n`가 포함되는지 확인한다.
-    - [ ] 커스텀 구분자가 길이가 1이 아니라면 예외 처리한다.
-    - [ ] 커스텀 구분자가 숫자라면 예외 처리한다.
-    - [ ] 커스텀 구분자가 실수를 표현하는 `.`라면 예외 처리한다.
-    - [ ] 커스텀 구분자가 기본 구분자라면 예외 처리 한다.
+    - [X] 커스텀 구분자가 길이가 1이 아니라면 예외 처리한다.
+    - [X] 커스텀 구분자가 숫자라면 예외 처리한다.
+    - [X] 커스텀 구분자가 실수를 표현하는 `.`라면 예외 처리한다.
+    - [X] 커스텀 구분자가 기본 구분자라면 예외 처리 한다.
 
 
 - 커스텀 구분자가 없을 입력일 때
diff --git a/src/main/java/calculator/Validator.java b/src/main/java/calculator/Validator.java
index 0a4cfff2a..bf7c1a318 100644
--- a/src/main/java/calculator/Validator.java
+++ b/src/main/java/calculator/Validator.java
@@ -8,4 +8,19 @@ public boolean hasCustomSeparator(String input) {
     public boolean isStartWithDigit(String input) {
         return Character.isDigit(input.charAt(0));
     }
+
+    public void validateSeparator(String separator) {
+        if (separator.length() != 1) {
+            throw new IllegalArgumentException("구분자의 길이는 1이어야 합니다.");
+        }
+        if (separator.equals(",") || separator.equals(":")) {
+            throw new IllegalArgumentException("이미 구분자로 등록 되어 있습니다.");
+        }
+        if (separator.equals(".")) {
+            throw new IllegalArgumentException(".은 구분자가 될 수 없습니다.");
+        }
+        if (isStartWithDigit(separator)) {
+            throw new IllegalArgumentException("숫자는 구분자가 될 수 없습니다.");
+        }
+    }
 }

From c932d2c90f8fbd6d5c711b2e34c8e0d24faaba01 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Thu, 17 Oct 2024 17:43:48 +0900
Subject: [PATCH 14/33] =?UTF-8?q?docs:=20=EA=B2=80=EC=82=AC=EA=B8=B0?=
 =?UTF-8?q?=EC=9D=98=20=EB=B2=94=EC=9C=84=20=EC=B4=88=EA=B3=BC=20=EC=98=88?=
 =?UTF-8?q?=EC=99=B8=EC=B2=98=EB=A6=AC=20=EA=B8=B0=EB=8A=A5=20=20=EB=8E=83?=
 =?UTF-8?q?=EC=85=88=EA=B8=B0=EB=A1=9C=20=EC=9D=B4=EB=8F=99?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

-  문자를 숫자로 변환시키는 클래스는 Adder라서 Validator에 어울리지 않는다고 생각함
---
 README.md | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index a43573dce..f046e44d7 100644
--- a/README.md
+++ b/README.md
@@ -20,9 +20,7 @@
 
 - 공통
     - [X] 커스텀 구분자를 입력하려는지 확인한다.
-    - [ ] 음수가 입력되었다면 예외 처리 한다.
-    - [ ] 입력값이 출력 범위를 초과한다면 예외 처리한다. (int, float)
-    - [ ] 더한 값이 출력 범위를 초과한다면 예외 처리한다. (long, double)
+    - [X] 음수가 입력되었다면 예외 처리 한다.
     - [ ] 구분자, `.`, 숫자 외 문자가 검출 된다면 예외 처리한다.
 
 ### 구분자 관리
@@ -39,6 +37,8 @@
 ### 덧셈기
 - [X] 전달 받은 값을 더해 저장한다.
 - [X] 저장한 결과 값을 전달한다.
+- [ ] 입력값이 출력 범위를 초과한다면 예외 처리한다.
+- [ ] 더한 값이 출력 범위를 초과한다면 예외 처리한다.
 
 ### 출력
 - [ ] 시작 메세지를 출력한다.

From 0f01bc4be31a31c4b9b7c48216dcaae56e71e043 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Fri, 18 Oct 2024 15:34:14 +0900
Subject: [PATCH 15/33] =?UTF-8?q?feat(Validator):=20=ED=8F=AC=EB=A9=A7?=
 =?UTF-8?q?=EC=97=90=20=EB=A7=9E=EC=A7=80=20=EC=95=8A=EB=8A=94=20=EC=9E=85?=
 =?UTF-8?q?=EB=A0=A5=EC=9D=BC=20=EC=8B=9C=20=EC=98=88=EC=99=B8=20=EC=B2=98?=
 =?UTF-8?q?=EB=A6=AC=20=EA=B8=B0=EB=8A=A5=20=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                                     |  2 +-
 src/main/java/calculator/StringHandler.java   |  5 +++++
 src/main/java/calculator/Validator.java       | 15 ++++++++++++++-
 ...ngerTest.java => SepartorManagerTest.java} |  2 +-
 .../java/calculator/StringHandlerTest.java    | 10 +++++++---
 src/test/java/calculator/ValidatorTest.java   | 19 +++++++++++++++++++
 6 files changed, 47 insertions(+), 6 deletions(-)
 rename src/test/java/calculator/{SepartorManangerTest.java => SepartorManagerTest.java} (96%)

diff --git a/README.md b/README.md
index f046e44d7..8d0bc631e 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@
 - 공통
     - [X] 커스텀 구분자를 입력하려는지 확인한다.
     - [X] 음수가 입력되었다면 예외 처리 한다.
-    - [ ] 구분자, `.`, 숫자 외 문자가 검출 된다면 예외 처리한다.
+    - [X] 구분자, `.`, 숫자 외 문자가 검출 된다면 예외 처리한다.
 
 ### 구분자 관리
 - [X] 기본 구분자 외 커스텀 구분자를 전달받아 추가한다.
diff --git a/src/main/java/calculator/StringHandler.java b/src/main/java/calculator/StringHandler.java
index a1ef9ae35..e091c404c 100644
--- a/src/main/java/calculator/StringHandler.java
+++ b/src/main/java/calculator/StringHandler.java
@@ -16,4 +16,9 @@ public List<String> getNumbers(List<String> separators, String input) {
         splitInput.removeAll(separators);
         return splitInput;
     }
+
+    public String removeCustom(String input) {
+        int end = input.indexOf("\n") + 1;
+        return input.substring(end);
+    }
 }
diff --git a/src/main/java/calculator/Validator.java b/src/main/java/calculator/Validator.java
index bf7c1a318..d6a98e0a5 100644
--- a/src/main/java/calculator/Validator.java
+++ b/src/main/java/calculator/Validator.java
@@ -23,4 +23,17 @@ public void validateSeparator(String separator) {
             throw new IllegalArgumentException("숫자는 구분자가 될 수 없습니다.");
         }
     }
-}
+
+    public void validateInput(String input) {
+        if (input.isBlank()) { // 공백일 때
+            return;
+        }
+        if (hasCustomSeparator(input)) { // //로 시작해 \n이 있을 때
+            return;
+        }
+        if (isStartWithDigit(input) && (!input.contains("//") && !input.contains("\n"))) {
+            return;
+        }
+        throw new IllegalArgumentException("포멧에 맞게 입력해 주세요.(ex://@\n1@2:3,4)");
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/calculator/SepartorManangerTest.java b/src/test/java/calculator/SepartorManagerTest.java
similarity index 96%
rename from src/test/java/calculator/SepartorManangerTest.java
rename to src/test/java/calculator/SepartorManagerTest.java
index f862cf380..79db77b4b 100644
--- a/src/test/java/calculator/SepartorManangerTest.java
+++ b/src/test/java/calculator/SepartorManagerTest.java
@@ -6,7 +6,7 @@
 
 import org.junit.jupiter.api.Test;
 
-class SeparatorManangerTest {
+class SeparatorManagerTest {
     SeparatorManager separatorManager = new SeparatorManager();
 
     @Test
diff --git a/src/test/java/calculator/StringHandlerTest.java b/src/test/java/calculator/StringHandlerTest.java
index 046f07241..46d10484c 100644
--- a/src/test/java/calculator/StringHandlerTest.java
+++ b/src/test/java/calculator/StringHandlerTest.java
@@ -2,8 +2,6 @@
 
 import static org.junit.jupiter.api.Assertions.*;
 
-import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
 import org.junit.jupiter.api.Test;
 
@@ -20,7 +18,13 @@ class StringHandlerTest {
 
     @Test
     void 숫자만_반환하는지_확인() {
-        assertEquals(List.of("1", "2", "3", "4"),
+        assertEquals(List.of("1", "2", "3"),
                 handler.getNumbers(separatorManager.getSeparators(), "1:2,3"));
     }
+
+    @Test
+    void 커스텀_구분자_선언부분만_잘라내는지_확인() {
+        assertEquals("1,2;3",
+                handler.removeCustom("//;\n1,2;3"));
+    }
 }
\ No newline at end of file
diff --git a/src/test/java/calculator/ValidatorTest.java b/src/test/java/calculator/ValidatorTest.java
index 26d7138d4..1f7f7d645 100644
--- a/src/test/java/calculator/ValidatorTest.java
+++ b/src/test/java/calculator/ValidatorTest.java
@@ -2,6 +2,8 @@
 
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
 import org.junit.jupiter.api.Test;
 
@@ -27,4 +29,21 @@ class ValidatorTest {
     void 숫자로_시작하지_않으면_False_반환() {
         assertFalse(validator.isStartWithDigit("//;\n"));
     }
+
+    @Test
+    void 올바른_포맷일때_아무_처리도_하지_않음() {
+        String[] testCases = {"//@\n1@2@3", " ", "", "//@\n", "1:2:3"};
+        for (String testCase : testCases) {
+            assertDoesNotThrow(() -> validator.validateInput(testCase));
+        }
+    }
+
+    @Test
+    void 잘못된_포맷은_예외_발생() {
+        String[] testCases = {"1@2@3//@\n", "\n@//1,2,3", "abc"};
+        for (String testCase : testCases) {
+            assertThatThrownBy(() -> validator.validateInput(testCase))
+                    .isInstanceOf(IllegalArgumentException.class);
+        }
+    }
 }
\ No newline at end of file

From eb937f153cfd154d5fedf3f8ddc034fe51be1965 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Sat, 19 Oct 2024 00:15:14 +0900
Subject: [PATCH 16/33] =?UTF-8?q?feat(Adder):=20=EC=98=A4=EB=B2=84=20?=
 =?UTF-8?q?=ED=94=8C=EB=A1=9C=EC=9A=B0=20=EB=B0=9C=EC=83=9D=20=EC=8B=9C=20?=
 =?UTF-8?q?=EC=98=88=EC=99=B8=20=EC=B2=98=EB=A6=AC=20=EA=B8=B0=EB=8A=A5=20?=
 =?UTF-8?q?=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

변경된 점
- answer 타입 변경 int -> long
- answer 타입 변경에 따른 getAnswer 타입 변경 int -> long
---
 README.md                               |  4 ++--
 src/main/java/calculator/Adder.java     | 15 ++++++++++++---
 src/test/java/calculator/AdderTest.java |  9 ++++++++-
 3 files changed, 22 insertions(+), 6 deletions(-)

diff --git a/README.md b/README.md
index 8d0bc631e..e44ebd2f3 100644
--- a/README.md
+++ b/README.md
@@ -37,8 +37,8 @@
 ### 덧셈기
 - [X] 전달 받은 값을 더해 저장한다.
 - [X] 저장한 결과 값을 전달한다.
-- [ ] 입력값이 출력 범위를 초과한다면 예외 처리한다.
-- [ ] 더한 값이 출력 범위를 초과한다면 예외 처리한다.
+- [X] 입력값이 출력 범위를 초과한다면 예외 처리한다.
+- [X] 더한 값이 출력 범위를 초과한다면 예외 처리한다.
 
 ### 출력
 - [ ] 시작 메세지를 출력한다.
diff --git a/src/main/java/calculator/Adder.java b/src/main/java/calculator/Adder.java
index eb3669a64..58fca8139 100644
--- a/src/main/java/calculator/Adder.java
+++ b/src/main/java/calculator/Adder.java
@@ -3,7 +3,7 @@
 import java.util.List;
 
 public class Adder {
-    int answer;
+    long answer;
 
     public void add(List<String> numbers) {
         answer = 0;
@@ -11,11 +11,20 @@ public void add(List<String> numbers) {
             if (number.isBlank()) {
                 continue;
             }
-            answer += Integer.parseInt(number);
+            long element = Long.parseLong(number);
+            validateOverflow(element);
+            answer += element;
         }
+        validateOverflow(answer);
     }
 
-    public int getAnswer() {
+    public long getAnswer() {
         return answer;
     }
+
+    private void validateOverflow(long number) {
+        if (number < 0) {
+            throw new IllegalArgumentException("허용 범위를 초과하였습니다.");
+        }
+    }
 }
diff --git a/src/test/java/calculator/AdderTest.java b/src/test/java/calculator/AdderTest.java
index b41249fbe..670ed6b26 100644
--- a/src/test/java/calculator/AdderTest.java
+++ b/src/test/java/calculator/AdderTest.java
@@ -1,6 +1,7 @@
 package calculator;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
 import java.util.List;
 import org.junit.jupiter.api.Test;
@@ -13,4 +14,10 @@ class AdderTest {
         adder.add(List.of(""));
         assertEquals(0, adder.getAnswer());
     }
+
+    @Test
+    void 오버플로우_발생시_예외_처리() {
+        assertThatThrownBy(() ->adder.add(List.of(String.valueOf(Double.MAX_VALUE),"1")))
+                .isInstanceOf(IllegalArgumentException.class);
+    }
 }
\ No newline at end of file

From d6a31617fc6d8ac8eab8794f8d6a9f9c470d4987 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Sat, 19 Oct 2024 00:19:55 +0900
Subject: [PATCH 17/33] =?UTF-8?q?feat(Output):=20=EC=8B=9C=EC=9E=91=20?=
 =?UTF-8?q?=EB=A9=94=EC=84=B8=EC=A7=80=20=EC=B6=9C=EB=A0=A5=20=EA=B8=B0?=
 =?UTF-8?q?=EB=8A=A5=20=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                            | 2 +-
 src/main/java/calculator/Output.java | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)
 create mode 100644 src/main/java/calculator/Output.java

diff --git a/README.md b/README.md
index e44ebd2f3..2d42765a4 100644
--- a/README.md
+++ b/README.md
@@ -41,5 +41,5 @@
 - [X] 더한 값이 출력 범위를 초과한다면 예외 처리한다.
 
 ### 출력
-- [ ] 시작 메세지를 출력한다.
+- [X] 시작 메세지를 출력한다.
 - [ ] 결과값을 출력한다.
\ No newline at end of file
diff --git a/src/main/java/calculator/Output.java b/src/main/java/calculator/Output.java
new file mode 100644
index 000000000..e06e5e88e
--- /dev/null
+++ b/src/main/java/calculator/Output.java
@@ -0,0 +1,7 @@
+package calculator;
+
+public class Output {
+    public void printStart() {
+        System.out.println("덧셈할 문자열을 입력해 주세요.");
+    }
+}

From 5efe9f2359a8db533dc75d7c345d47171218d733 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Sat, 19 Oct 2024 00:32:11 +0900
Subject: [PATCH 18/33] =?UTF-8?q?feat(Output):=20=EA=B2=B0=EA=B3=BC?=
 =?UTF-8?q?=EA=B0=92=20=EC=B6=9C=EB=A0=A5=20=EA=B8=B0=EB=8A=A5=20=EA=B5=AC?=
 =?UTF-8?q?=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                            | 2 +-
 src/main/java/calculator/Output.java | 4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 2d42765a4..7e86a6ea7 100644
--- a/README.md
+++ b/README.md
@@ -42,4 +42,4 @@
 
 ### 출력
 - [X] 시작 메세지를 출력한다.
-- [ ] 결과값을 출력한다.
\ No newline at end of file
+- [X] 결과값을 출력한다.
\ No newline at end of file
diff --git a/src/main/java/calculator/Output.java b/src/main/java/calculator/Output.java
index e06e5e88e..ad987a132 100644
--- a/src/main/java/calculator/Output.java
+++ b/src/main/java/calculator/Output.java
@@ -4,4 +4,8 @@ public class Output {
     public void printStart() {
         System.out.println("덧셈할 문자열을 입력해 주세요.");
     }
+
+    public void printResult(long result) {
+        System.out.println("결과 : " + result);
+    }
 }

From bebc033d196b3cfc9a7a30565e3b76512a4a0624 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Sat, 19 Oct 2024 16:01:29 +0900
Subject: [PATCH 19/33] =?UTF-8?q?fix(StringHandler):=20getNumbers()=20?=
 =?UTF-8?q?=EB=AA=A8=EB=93=A0=20=EC=88=98=EA=B0=80=201=EC=9D=98=20?=
 =?UTF-8?q?=EC=9E=90=EB=A6=AC=EB=A1=9C=20=EB=90=98=EB=8A=94=20=EB=B2=84?=
 =?UTF-8?q?=EA=B7=B8=20=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

기존에 두자리 이상 숫자도 한자리씩 잘라 리턴하는 현상 발견
---
 src/main/java/calculator/StringHandler.java     | 11 +++++++++--
 src/test/java/calculator/StringHandlerTest.java |  6 ++++++
 2 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/src/main/java/calculator/StringHandler.java b/src/main/java/calculator/StringHandler.java
index e091c404c..4e8f2f71f 100644
--- a/src/main/java/calculator/StringHandler.java
+++ b/src/main/java/calculator/StringHandler.java
@@ -12,8 +12,15 @@ public String extractSeparator(String input) {
     }
 
     public List<String> getNumbers(List<String> separators, String input) {
-        List<String> splitInput = new ArrayList<>(Arrays.asList(input.split("")));
-        splitInput.removeAll(separators);
+        List<String> splitInput = new ArrayList<>(Arrays.asList(input));
+
+        for (String separator : separators) {
+            List<String> tempResult = new ArrayList<>();
+            for (String part : splitInput) {
+                tempResult.addAll(Arrays.asList(part.split(separator)));
+            }
+            splitInput = tempResult;
+        }
         return splitInput;
     }
 
diff --git a/src/test/java/calculator/StringHandlerTest.java b/src/test/java/calculator/StringHandlerTest.java
index 46d10484c..1f95634cd 100644
--- a/src/test/java/calculator/StringHandlerTest.java
+++ b/src/test/java/calculator/StringHandlerTest.java
@@ -22,6 +22,12 @@ class StringHandlerTest {
                 handler.getNumbers(separatorManager.getSeparators(), "1:2,3"));
     }
 
+    @Test
+    void 두자리_이상의_숫자가_잘_반환_되는지_확인() {
+        assertEquals(List.of("12", "36", "222"),
+                handler.getNumbers(separatorManager.getSeparators(), "12,36:222"));
+    }
+
     @Test
     void 커스텀_구분자_선언부분만_잘라내는지_확인() {
         assertEquals("1,2;3",

From f192a39bb7802caa03368a5b2d7251bb8ed0174c Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Sat, 19 Oct 2024 16:53:22 +0900
Subject: [PATCH 20/33] =?UTF-8?q?fix(StringHandler):=20=EC=BB=A4=EC=8A=A4?=
 =?UTF-8?q?=ED=85=80=20=EA=B5=AC=EB=B6=84=EC=9E=90=20=EC=84=A0=EC=96=B8?=
 =?UTF-8?q?=EB=AC=B8=20=EC=B6=94=EC=B6=9C,=20=EC=A0=9C=EA=B1=B0=20?=
 =?UTF-8?q?=EA=B8=B0=EB=8A=A5=20=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

* extractSeparactor()
- start index 값 말고, 좀 더 static 하게 변경 (변경 될 가능성 큼)
- end 입력 되는 \n이 개행문자가 아님을 알리기 위해 이스케이프 문자 추가 (\n -> \n)

* removeCustom()
- 개행문자가 아님을 알림 (변경 가능성 큼)
---
 src/main/java/calculator/StringHandler.java | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/main/java/calculator/StringHandler.java b/src/main/java/calculator/StringHandler.java
index 4e8f2f71f..a5adc3654 100644
--- a/src/main/java/calculator/StringHandler.java
+++ b/src/main/java/calculator/StringHandler.java
@@ -6,8 +6,8 @@
 
 public class StringHandler {
     public String extractSeparator(String input) {
-        int start = input.indexOf("//") + 2;
-        int end = input.indexOf("\n");
+        int start = "//".length() ;
+        int end = input.indexOf("\\n");
         return input.substring(start, end);
     }
 
@@ -25,7 +25,7 @@ public List<String> getNumbers(List<String> separators, String input) {
     }
 
     public String removeCustom(String input) {
-        int end = input.indexOf("\n") + 1;
+        int end = input.indexOf("\\n") + 2;
         return input.substring(end);
     }
 }

From 93dc6496a2678c4428d5a58df5e67dfedf8d7aa9 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Sat, 19 Oct 2024 16:54:49 +0900
Subject: [PATCH 21/33] =?UTF-8?q?docs:=20=EB=AC=B8=EC=9E=90=EC=97=B4=20?=
 =?UTF-8?q?=ED=95=B8=EB=93=A4=EB=9F=AC=20=EA=B8=B0=EB=8A=A5=20=EA=B5=AC?=
 =?UTF-8?q?=ED=98=84=20=EB=AA=A9=EB=A1=9D=20=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- 이미 분리한 문자열을 넘기고 있어 삭제
---
 README.md | 1 -
 1 file changed, 1 deletion(-)

diff --git a/README.md b/README.md
index 7e86a6ea7..82b6e5f80 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,6 @@
 - [X] 커스텀 구분자를 선언한다면 분리한다.
 - [X] 분리한 커스텀 구분자를 넘겨준다.
 - [X] 전달받은 구분자로 입력받은 문자열을 분리한다.
-- [ ] 분리한 문자를 넘겨준다.
 
 ### 덧셈기
 - [X] 전달 받은 값을 더해 저장한다.

From dde4daafd12c42a3bd94dc9f54fc35691240ec32 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Sat, 19 Oct 2024 17:06:23 +0900
Subject: [PATCH 22/33] =?UTF-8?q?fix(Validator):=20=EC=BB=A4=EC=8A=A4?=
 =?UTF-8?q?=ED=85=80=20=EA=B5=AC=EB=B6=84=EC=9E=90=20=EC=9C=A0=EB=AC=B4,?=
 =?UTF-8?q?=20=EC=9E=85=EB=A0=A5=EA=B0=92=20=EA=B2=80=EC=A6=9D=20=EA=B8=B0?=
 =?UTF-8?q?=EB=8A=A5=20=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

* hasCustomSeparator()
- 개행 문자로 인식하지 않도록 수정 (\n -> \n)

* validateInput()
- 주석 제거
- 개행문자로 인식하지 않도록 수정 (\n -> \n)
---
 src/main/java/calculator/Validator.java | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/main/java/calculator/Validator.java b/src/main/java/calculator/Validator.java
index d6a98e0a5..fe19cc5fc 100644
--- a/src/main/java/calculator/Validator.java
+++ b/src/main/java/calculator/Validator.java
@@ -2,7 +2,7 @@
 
 public class Validator {
     public boolean hasCustomSeparator(String input) {
-        return input.startsWith("//") && input.contains("\n");
+        return input.startsWith("//") && input.contains("\\n");
     }
 
     public boolean isStartWithDigit(String input) {
@@ -25,15 +25,15 @@ public void validateSeparator(String separator) {
     }
 
     public void validateInput(String input) {
-        if (input.isBlank()) { // 공백일 때
+        if (input.isBlank()) {
             return;
         }
-        if (hasCustomSeparator(input)) { // //로 시작해 \n이 있을 때
+        if (hasCustomSeparator(input)) {
             return;
         }
-        if (isStartWithDigit(input) && (!input.contains("//") && !input.contains("\n"))) {
+        if (isStartWithDigit(input) && (!input.contains("//") && !input.contains("\\n"))) {
             return;
         }
-        throw new IllegalArgumentException("포멧에 맞게 입력해 주세요.(ex://@\n1@2:3,4)");
+        throw new IllegalArgumentException("포멧에 맞게 입력해 주세요.(ex://@\\n1@2:3,4)");
     }
 }
\ No newline at end of file

From 10266896f8c10a36e22cf5f1d93814a3293ad1ad Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Sat, 19 Oct 2024 17:08:59 +0900
Subject: [PATCH 23/33] =?UTF-8?q?feat(Controller):=20=EC=8B=9C=EC=8A=A4?=
 =?UTF-8?q?=ED=85=9C=20=EB=A1=9C=EC=A7=81=20=EA=B8=B0=EB=8A=A5=20=EA=B5=AC?=
 =?UTF-8?q?=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/calculator/Controller.java | 39 ++++++++++++++++++++++++
 1 file changed, 39 insertions(+)
 create mode 100644 src/main/java/calculator/Controller.java

diff --git a/src/main/java/calculator/Controller.java b/src/main/java/calculator/Controller.java
new file mode 100644
index 000000000..f24030168
--- /dev/null
+++ b/src/main/java/calculator/Controller.java
@@ -0,0 +1,39 @@
+package calculator;
+
+import java.util.List;
+
+public class Controller {
+    Input input = new Input();
+    Output output = new Output();
+    SeparatorManager separatorManager = new SeparatorManager();
+    StringHandler stringHandler = new StringHandler();
+    Validator validator = new Validator();
+    Adder adder = new Adder();
+
+    public void start() {
+        output.printStart();
+        String userInput = input.readInput();
+        validator.validateInput(userInput);
+
+        if (validator.hasCustomSeparator(userInput)) {
+            String separator = stringHandler.extractSeparator(userInput);
+            validator.validateSeparator(separator);
+            separatorManager.add(separator);
+            String rawNumbers = stringHandler.removeCustom(userInput);
+            List<String> numbers = stringHandler.getNumbers(
+                    separatorManager.getSeparators(),
+                    rawNumbers);
+            adder.add(numbers);
+            output.printResult(adder.getAnswer());
+        }
+
+        if (validator.isStartWithDigit(userInput)) {
+            List<String> numbers =  stringHandler.getNumbers(
+                    separatorManager.getSeparators(),
+                    userInput
+            );
+            adder.add(numbers);
+            output.printResult(adder.getAnswer());
+        }
+    }
+}

From 92538881ad8d1b604fa7d894fe77c426106a17be Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Sat, 19 Oct 2024 17:09:30 +0900
Subject: [PATCH 24/33] =?UTF-8?q?feat(Application):=20=EC=96=B4=ED=94=8C?=
 =?UTF-8?q?=EB=A6=AC=EC=BC=80=EC=9D=B4=EC=85=98=20=EA=B8=B0=EB=8A=A5=20?=
 =?UTF-8?q?=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/calculator/Application.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/main/java/calculator/Application.java b/src/main/java/calculator/Application.java
index 573580fb4..12f94718c 100644
--- a/src/main/java/calculator/Application.java
+++ b/src/main/java/calculator/Application.java
@@ -2,6 +2,7 @@
 
 public class Application {
     public static void main(String[] args) {
-        // TODO: 프로그램 구현
+        Controller controller = new Controller();
+        controller.start();
     }
 }

From 1d200a74fc3cf2b8cabd96ac9dea1541bb78c6fd Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Sat, 19 Oct 2024 17:15:07 +0900
Subject: [PATCH 25/33] =?UTF-8?q?fix(test):=20=EA=B0=9C=ED=96=89=20?=
 =?UTF-8?q?=EB=AC=B8=EC=9E=90=EB=A1=9C=20=EC=9D=B8=EC=8B=9D=ED=95=98?=
 =?UTF-8?q?=EC=A7=80=20=EC=95=8A=EB=8F=84=EB=A1=9D=20=EC=88=98=EC=A0=95=20?=
 =?UTF-8?q?(\n=20->=20\n)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../{SepartorManagerTest.java => SeparatorManagerTest.java} | 0
 src/test/java/calculator/StringHandlerTest.java             | 4 ++--
 src/test/java/calculator/ValidatorTest.java                 | 6 +++---
 3 files changed, 5 insertions(+), 5 deletions(-)
 rename src/test/java/calculator/{SepartorManagerTest.java => SeparatorManagerTest.java} (100%)

diff --git a/src/test/java/calculator/SepartorManagerTest.java b/src/test/java/calculator/SeparatorManagerTest.java
similarity index 100%
rename from src/test/java/calculator/SepartorManagerTest.java
rename to src/test/java/calculator/SeparatorManagerTest.java
diff --git a/src/test/java/calculator/StringHandlerTest.java b/src/test/java/calculator/StringHandlerTest.java
index 1f95634cd..ca3e901e4 100644
--- a/src/test/java/calculator/StringHandlerTest.java
+++ b/src/test/java/calculator/StringHandlerTest.java
@@ -12,7 +12,7 @@ class StringHandlerTest {
     @Test
     void 커스텀구분자만_리턴하는지_확인() {
         assertEquals("@",
-                handler.extractSeparator("//@\n1@2@3"));
+                handler.extractSeparator("//@\\n1@2@3"));
     }
 
 
@@ -31,6 +31,6 @@ class StringHandlerTest {
     @Test
     void 커스텀_구분자_선언부분만_잘라내는지_확인() {
         assertEquals("1,2;3",
-                handler.removeCustom("//;\n1,2;3"));
+                handler.removeCustom("//;\\n1,2;3"));
     }
 }
\ No newline at end of file
diff --git a/src/test/java/calculator/ValidatorTest.java b/src/test/java/calculator/ValidatorTest.java
index 1f7f7d645..142e1cca6 100644
--- a/src/test/java/calculator/ValidatorTest.java
+++ b/src/test/java/calculator/ValidatorTest.java
@@ -12,7 +12,7 @@ class ValidatorTest {
 
     @Test
     void 커스텀_구분자의_포맷이_올바르면_True_반환() {
-        assertTrue(validator.hasCustomSeparator("//;\n1;2;3"));
+        assertTrue(validator.hasCustomSeparator("//;\\n1;2;3"));
     }
 
     @Test
@@ -27,12 +27,12 @@ class ValidatorTest {
 
     @Test
     void 숫자로_시작하지_않으면_False_반환() {
-        assertFalse(validator.isStartWithDigit("//;\n"));
+        assertFalse(validator.isStartWithDigit("//;\\n"));
     }
 
     @Test
     void 올바른_포맷일때_아무_처리도_하지_않음() {
-        String[] testCases = {"//@\n1@2@3", " ", "", "//@\n", "1:2:3"};
+        String[] testCases = {"//@\\n1@2@3", " ", "", "//@\\n", "1:2:3"};
         for (String testCase : testCases) {
             assertDoesNotThrow(() -> validator.validateInput(testCase));
         }

From a801593a211b953e1971135d2fe4a11d3bca48f8 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Sat, 19 Oct 2024 17:20:58 +0900
Subject: [PATCH 26/33] =?UTF-8?q?refactor:=20=EC=9C=A0=ED=8B=B8=EC=84=B1?=
 =?UTF-8?q?=20=EB=9D=84=EB=8A=94=20=ED=81=B4=EB=9E=98=EC=8A=A4=20util=20pa?=
 =?UTF-8?q?ckage=EB=A1=9C=20=EC=9D=B4=EB=8F=99?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/calculator/{ => util}/Adder.java            | 0
 src/main/java/calculator/{ => util}/SeparatorManager.java | 0
 src/main/java/calculator/{ => util}/StringHandler.java    | 0
 src/main/java/calculator/{ => util}/Validator.java        | 0
 src/test/java/calculator/AdderTest.java                   | 1 +
 src/test/java/calculator/SeparatorManagerTest.java        | 1 +
 src/test/java/calculator/StringHandlerTest.java           | 2 ++
 src/test/java/calculator/ValidatorTest.java               | 1 +
 8 files changed, 5 insertions(+)
 rename src/main/java/calculator/{ => util}/Adder.java (100%)
 rename src/main/java/calculator/{ => util}/SeparatorManager.java (100%)
 rename src/main/java/calculator/{ => util}/StringHandler.java (100%)
 rename src/main/java/calculator/{ => util}/Validator.java (100%)

diff --git a/src/main/java/calculator/Adder.java b/src/main/java/calculator/util/Adder.java
similarity index 100%
rename from src/main/java/calculator/Adder.java
rename to src/main/java/calculator/util/Adder.java
diff --git a/src/main/java/calculator/SeparatorManager.java b/src/main/java/calculator/util/SeparatorManager.java
similarity index 100%
rename from src/main/java/calculator/SeparatorManager.java
rename to src/main/java/calculator/util/SeparatorManager.java
diff --git a/src/main/java/calculator/StringHandler.java b/src/main/java/calculator/util/StringHandler.java
similarity index 100%
rename from src/main/java/calculator/StringHandler.java
rename to src/main/java/calculator/util/StringHandler.java
diff --git a/src/main/java/calculator/Validator.java b/src/main/java/calculator/util/Validator.java
similarity index 100%
rename from src/main/java/calculator/Validator.java
rename to src/main/java/calculator/util/Validator.java
diff --git a/src/test/java/calculator/AdderTest.java b/src/test/java/calculator/AdderTest.java
index 670ed6b26..b62ab4c9e 100644
--- a/src/test/java/calculator/AdderTest.java
+++ b/src/test/java/calculator/AdderTest.java
@@ -3,6 +3,7 @@
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
+import calculator.util.Adder;
 import java.util.List;
 import org.junit.jupiter.api.Test;
 
diff --git a/src/test/java/calculator/SeparatorManagerTest.java b/src/test/java/calculator/SeparatorManagerTest.java
index 79db77b4b..5ae18d175 100644
--- a/src/test/java/calculator/SeparatorManagerTest.java
+++ b/src/test/java/calculator/SeparatorManagerTest.java
@@ -4,6 +4,7 @@
 import static org.junit.jupiter.api.Assertions.assertTrue;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 
+import calculator.util.SeparatorManager;
 import org.junit.jupiter.api.Test;
 
 class SeparatorManagerTest {
diff --git a/src/test/java/calculator/StringHandlerTest.java b/src/test/java/calculator/StringHandlerTest.java
index ca3e901e4..2bac79da9 100644
--- a/src/test/java/calculator/StringHandlerTest.java
+++ b/src/test/java/calculator/StringHandlerTest.java
@@ -2,6 +2,8 @@
 
 import static org.junit.jupiter.api.Assertions.*;
 
+import calculator.util.SeparatorManager;
+import calculator.util.StringHandler;
 import java.util.List;
 import org.junit.jupiter.api.Test;
 
diff --git a/src/test/java/calculator/ValidatorTest.java b/src/test/java/calculator/ValidatorTest.java
index 142e1cca6..20c2718db 100644
--- a/src/test/java/calculator/ValidatorTest.java
+++ b/src/test/java/calculator/ValidatorTest.java
@@ -5,6 +5,7 @@
 import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
+import calculator.util.Validator;
 import org.junit.jupiter.api.Test;
 
 class ValidatorTest {

From 050b645bcbc88ebe7a3e459ec6797c3bd727831f Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Sat, 19 Oct 2024 17:24:15 +0900
Subject: [PATCH 27/33] =?UTF-8?q?chore(Controller):=20util=20=ED=8C=A8?=
 =?UTF-8?q?=ED=82=A4=EC=A7=80=20=EC=9D=B4=EB=8F=99=EC=9C=BC=EB=A1=9C=20?=
 =?UTF-8?q?=EC=9D=B8=ED=95=9C=20import=20=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/main/java/calculator/Controller.java            | 4 ++++
 src/main/java/calculator/util/Adder.java            | 2 +-
 src/main/java/calculator/util/SeparatorManager.java | 2 +-
 src/main/java/calculator/util/StringHandler.java    | 2 +-
 src/main/java/calculator/util/Validator.java        | 2 +-
 5 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/main/java/calculator/Controller.java b/src/main/java/calculator/Controller.java
index f24030168..5e1685527 100644
--- a/src/main/java/calculator/Controller.java
+++ b/src/main/java/calculator/Controller.java
@@ -1,5 +1,9 @@
 package calculator;
 
+import calculator.util.Adder;
+import calculator.util.SeparatorManager;
+import calculator.util.StringHandler;
+import calculator.util.Validator;
 import java.util.List;
 
 public class Controller {
diff --git a/src/main/java/calculator/util/Adder.java b/src/main/java/calculator/util/Adder.java
index 58fca8139..fc9333747 100644
--- a/src/main/java/calculator/util/Adder.java
+++ b/src/main/java/calculator/util/Adder.java
@@ -1,4 +1,4 @@
-package calculator;
+package calculator.util;
 
 import java.util.List;
 
diff --git a/src/main/java/calculator/util/SeparatorManager.java b/src/main/java/calculator/util/SeparatorManager.java
index 5a5584c02..067798c90 100644
--- a/src/main/java/calculator/util/SeparatorManager.java
+++ b/src/main/java/calculator/util/SeparatorManager.java
@@ -1,4 +1,4 @@
-package calculator;
+package calculator.util;
 
 import java.util.ArrayList;
 import java.util.Arrays;
diff --git a/src/main/java/calculator/util/StringHandler.java b/src/main/java/calculator/util/StringHandler.java
index a5adc3654..ff7e064bc 100644
--- a/src/main/java/calculator/util/StringHandler.java
+++ b/src/main/java/calculator/util/StringHandler.java
@@ -1,4 +1,4 @@
-package calculator;
+package calculator.util;
 
 import java.util.ArrayList;
 import java.util.Arrays;
diff --git a/src/main/java/calculator/util/Validator.java b/src/main/java/calculator/util/Validator.java
index fe19cc5fc..e47b2f3e3 100644
--- a/src/main/java/calculator/util/Validator.java
+++ b/src/main/java/calculator/util/Validator.java
@@ -1,4 +1,4 @@
-package calculator;
+package calculator.util;
 
 public class Validator {
     public boolean hasCustomSeparator(String input) {

From f9c80d1da176ef742ca98116ee17381f458fbab2 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Sat, 19 Oct 2024 17:52:08 +0900
Subject: [PATCH 28/33] =?UTF-8?q?fix(util):=20Validator=20=EA=B3=B5?=
 =?UTF-8?q?=EB=B0=B1=20=EC=9E=85=EB=A0=A5=EC=8B=9C=20=EC=97=90=EB=9F=AC=20?=
 =?UTF-8?q?=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

* isEmpty() 구현
- 기존 공백인지 미리 검증 하지 않아 index 초과 에러 발생
- 공백임을 검증하는 함수 따로 구현 -> 커스텀 구분자 확인, 숫자로 시작하는지 확인 하는 함수에 추가
- validateInput에 공백인지를 검사하는 코드 대체
---
 src/main/java/calculator/util/Validator.java | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/main/java/calculator/util/Validator.java b/src/main/java/calculator/util/Validator.java
index e47b2f3e3..9bc9ff5f9 100644
--- a/src/main/java/calculator/util/Validator.java
+++ b/src/main/java/calculator/util/Validator.java
@@ -2,13 +2,23 @@
 
 public class Validator {
     public boolean hasCustomSeparator(String input) {
+        if (isEmpty(input)) {
+            return false;
+        }
         return input.startsWith("//") && input.contains("\\n");
     }
 
     public boolean isStartWithDigit(String input) {
+        if (isEmpty(input)) {
+            return false;
+        }
         return Character.isDigit(input.charAt(0));
     }
 
+    public boolean isEmpty(String input) {
+        return input == null || input.isBlank();
+    }
+
     public void validateSeparator(String separator) {
         if (separator.length() != 1) {
             throw new IllegalArgumentException("구분자의 길이는 1이어야 합니다.");
@@ -25,7 +35,7 @@ public void validateSeparator(String separator) {
     }
 
     public void validateInput(String input) {
-        if (input.isBlank()) {
+        if (isEmpty(input)) {
             return;
         }
         if (hasCustomSeparator(input)) {

From c90a5125cc1a1afd6a22a1404999fc17a9924ae6 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Mon, 21 Oct 2024 10:52:55 +0900
Subject: [PATCH 29/33] =?UTF-8?q?feat(Adder):=20=EC=88=AB=EC=9E=90?=
 =?UTF-8?q?=EB=A7=8C=20=EC=9E=85=EB=A0=A5=20=EB=90=98=EC=97=88=EB=8A=94?=
 =?UTF-8?q?=EC=A7=80=20=ED=99=95=EC=9D=B8=ED=95=98=EB=8A=94=20=EA=B8=B0?=
 =?UTF-8?q?=EB=8A=A5=20=EA=B5=AC=ED=98=84?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                                     | 15 ++++++++++++++-
 src/main/java/calculator/Controller.java      |  3 +++
 src/main/java/calculator/util/Adder.java      |  9 +++++++++
 src/test/java/calculator/ApplicationTest.java |  8 ++++++++
 4 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 82b6e5f80..06163fa80 100644
--- a/README.md
+++ b/README.md
@@ -41,4 +41,17 @@
 
 ### 출력
 - [X] 시작 메세지를 출력한다.
-- [X] 결과값을 출력한다.
\ No newline at end of file
+- [X] 결과값을 출력한다.
+
+---
+## 리팩토링
+
+- [ ] 하드 코딩 제거
+- [ ] 코딩 컨벤션 준수
+- [ ] 이상한 수식 넣었을 때 에러
+  ```
+  덧셈할 문자열을 입력해 주세요.
+  //;\n112kio12u328948
+  Exception in thread "main" java.lang.NumberFormatException: For input string: "112kio12u328948"
+  ```
+- [ ] 기능 쪼개기
\ No newline at end of file
diff --git a/src/main/java/calculator/Controller.java b/src/main/java/calculator/Controller.java
index 5e1685527..1015c1bfa 100644
--- a/src/main/java/calculator/Controller.java
+++ b/src/main/java/calculator/Controller.java
@@ -29,6 +29,7 @@ public void start() {
                     rawNumbers);
             adder.add(numbers);
             output.printResult(adder.getAnswer());
+            return;
         }
 
         if (validator.isStartWithDigit(userInput)) {
@@ -38,6 +39,8 @@ public void start() {
             );
             adder.add(numbers);
             output.printResult(adder.getAnswer());
+            return;
         }
+        output.printResult(adder.getAnswer());
     }
 }
diff --git a/src/main/java/calculator/util/Adder.java b/src/main/java/calculator/util/Adder.java
index fc9333747..fa9367730 100644
--- a/src/main/java/calculator/util/Adder.java
+++ b/src/main/java/calculator/util/Adder.java
@@ -11,6 +11,7 @@ public void add(List<String> numbers) {
             if (number.isBlank()) {
                 continue;
             }
+            validateNumber(number);
             long element = Long.parseLong(number);
             validateOverflow(element);
             answer += element;
@@ -27,4 +28,12 @@ private void validateOverflow(long number) {
             throw new IllegalArgumentException("허용 범위를 초과하였습니다.");
         }
     }
+
+    private void validateNumber(String number) {
+        for (int i = 0; i < number.length(); i++) {
+            if (!Character.isDigit(number.charAt(i))) {
+                throw new IllegalArgumentException("숫자만 더할 수 있습니다.");
+            }
+        }
+    }
 }
diff --git a/src/test/java/calculator/ApplicationTest.java b/src/test/java/calculator/ApplicationTest.java
index 93771fb01..0d174ce87 100644
--- a/src/test/java/calculator/ApplicationTest.java
+++ b/src/test/java/calculator/ApplicationTest.java
@@ -16,6 +16,14 @@ class ApplicationTest extends NsTest {
         });
     }
 
+    @Test
+    void 공백_입력() {
+        assertSimpleTest(() -> {
+            run(" ");
+            assertThat(output()).contains("결과 : 0");
+        });
+    }
+
     @Test
     void 예외_테스트() {
         assertSimpleTest(() ->

From 9aad1c318aa77a108e65d8167dc611965e1f8791 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Mon, 21 Oct 2024 10:55:09 +0900
Subject: [PATCH 30/33] =?UTF-8?q?style:=20import=20=EC=99=80=EC=9D=BC?=
 =?UTF-8?q?=EB=93=9C=20=EC=B9=B4=EB=93=9C=20=EC=A0=9C=EA=B1=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 src/test/java/calculator/StringHandlerTest.java | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/test/java/calculator/StringHandlerTest.java b/src/test/java/calculator/StringHandlerTest.java
index 2bac79da9..6b903435f 100644
--- a/src/test/java/calculator/StringHandlerTest.java
+++ b/src/test/java/calculator/StringHandlerTest.java
@@ -1,6 +1,6 @@
 package calculator;
 
-import static org.junit.jupiter.api.Assertions.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import calculator.util.SeparatorManager;
 import calculator.util.StringHandler;

From c3dbbc04f7214e775aa20ece11802bc7fa1fab19 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Mon, 21 Oct 2024 17:35:41 +0900
Subject: [PATCH 31/33] =?UTF-8?q?refactor(SeparatorManage):=20=EC=BB=A4?=
 =?UTF-8?q?=EC=8A=A4=ED=85=80=20=EA=B5=AC=EB=B6=84=EC=9E=90=20=EC=B6=94?=
 =?UTF-8?q?=EA=B0=80=20=EC=9D=B4=EC=A0=84=20=EC=9D=B4=EB=AF=B8=20=EC=A1=B4?=
 =?UTF-8?q?=EC=9E=AC=ED=95=98=EB=8A=94=EC=A7=80=20=EA=B2=80=EC=A6=9D?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

이전에 exists 메소드가 사용되지 않았음
add 메소드에 구분자가 이미 존재하는지 검증 과정을 거치도록 바꿈
+ test 코드도 이미 존재하는지 없는지 로직에 따라 바꿈 (boolean에서 예외처리하도록)
---
 src/main/java/calculator/util/SeparatorManager.java |  5 ++++-
 src/test/java/calculator/SeparatorManagerTest.java  | 13 +++++++------
 2 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/src/main/java/calculator/util/SeparatorManager.java b/src/main/java/calculator/util/SeparatorManager.java
index 067798c90..3e3978aba 100644
--- a/src/main/java/calculator/util/SeparatorManager.java
+++ b/src/main/java/calculator/util/SeparatorManager.java
@@ -12,11 +12,14 @@ public SeparatorManager() {
         this.separators = new ArrayList<>(Arrays.asList(",", ":"));
     }
 
-    public boolean exists(String separator) {
+    private boolean exists(String separator) {
         return separators.contains(separator);
     }
 
     public void add(String separator) {
+        if (this.exists(separator)) {
+            throw new IllegalArgumentException("이미 존재하는 구분자입니다.");
+        }
         separators.add(separator);
     }
 
diff --git a/src/test/java/calculator/SeparatorManagerTest.java b/src/test/java/calculator/SeparatorManagerTest.java
index 5ae18d175..5335bd1a0 100644
--- a/src/test/java/calculator/SeparatorManagerTest.java
+++ b/src/test/java/calculator/SeparatorManagerTest.java
@@ -1,8 +1,7 @@
 package calculator;
 
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
-import static org.junit.jupiter.api.Assertions.assertTrue;
-import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.assertj.core.api.AssertionsForClassTypes.assertThatCode;
 
 import calculator.util.SeparatorManager;
 import org.junit.jupiter.api.Test;
@@ -11,13 +10,15 @@ class SeparatorManagerTest {
     SeparatorManager separatorManager = new SeparatorManager();
 
     @Test
-    void 이미_있는_구분자라면_True_반환() {
-        assertTrue(separatorManager.exists(":"));
+    void 이미_있는_구분자라면_예외_처리() {
+        assertThatThrownBy(() -> separatorManager.add(":"))
+                .isInstanceOf(IllegalArgumentException.class);
     }
 
     @Test
-    void 없는_구분자라면_False_반환() {
-        assertFalse(separatorManager.exists("!"));
+    void 없는_구분자라면_정상_작동() {
+        assertThatCode(() -> separatorManager.add(";"))
+                .doesNotThrowAnyException();
     }
 
     @Test

From bdc59bb0b437c5c60887afc268e1f03243e173e1 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Mon, 21 Oct 2024 17:51:26 +0900
Subject: [PATCH 32/33] =?UTF-8?q?refactor:=20=ED=95=98=EB=93=9C=20?=
 =?UTF-8?q?=EC=BD=94=EB=94=A9=20=EC=A0=9C=EA=B1=B0?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

예외 메세지는 따로 관리하는게 더 여러울 것 같아서 제외했음
- 커스텀 구분자 접두사, 접미사 Constants에 따로 선언
- 기본 구분자 리스트를 불변한 리스트로 따로 선언
- 올바른 구분자 길이 선언
- 추후 확장을 위한 소수점 선언
---
 src/main/java/calculator/util/Adder.java      |  2 +-
 src/main/java/calculator/util/Constants.java  | 11 +++++++
 .../calculator/util/SeparatorManager.java     |  2 +-
 .../java/calculator/util/StringHandler.java   | 29 ++++++++++++-------
 src/main/java/calculator/util/Validator.java  | 15 +++++-----
 5 files changed, 39 insertions(+), 20 deletions(-)
 create mode 100644 src/main/java/calculator/util/Constants.java

diff --git a/src/main/java/calculator/util/Adder.java b/src/main/java/calculator/util/Adder.java
index fa9367730..5ec67194d 100644
--- a/src/main/java/calculator/util/Adder.java
+++ b/src/main/java/calculator/util/Adder.java
@@ -32,7 +32,7 @@ private void validateOverflow(long number) {
     private void validateNumber(String number) {
         for (int i = 0; i < number.length(); i++) {
             if (!Character.isDigit(number.charAt(i))) {
-                throw new IllegalArgumentException("숫자만 더할 수 있습니다.");
+                throw new IllegalArgumentException("등록된 구분자가 아닙니다.");
             }
         }
     }
diff --git a/src/main/java/calculator/util/Constants.java b/src/main/java/calculator/util/Constants.java
new file mode 100644
index 000000000..b47145240
--- /dev/null
+++ b/src/main/java/calculator/util/Constants.java
@@ -0,0 +1,11 @@
+package calculator.util;
+
+import java.util.List;
+
+public class Constants {
+    public static final String CUSTOM_PREFIX = "//";
+    public static final String CUSTOM_SUFFIX = "\\n";
+    public static final int SEPARATOR_LENGTH = 1;
+    public static final String DECIMAL_POINT = ".";
+    public static final List<String> DEFAULT_SEPARATORS = List.of(":", ",");
+}
diff --git a/src/main/java/calculator/util/SeparatorManager.java b/src/main/java/calculator/util/SeparatorManager.java
index 3e3978aba..cfba21158 100644
--- a/src/main/java/calculator/util/SeparatorManager.java
+++ b/src/main/java/calculator/util/SeparatorManager.java
@@ -9,7 +9,7 @@ public class SeparatorManager {
     List<String> separators;
 
     public SeparatorManager() {
-        this.separators = new ArrayList<>(Arrays.asList(",", ":"));
+        this.separators = new ArrayList<>(Constants.DEFAULT_SEPARATORS);
     }
 
     private boolean exists(String separator) {
diff --git a/src/main/java/calculator/util/StringHandler.java b/src/main/java/calculator/util/StringHandler.java
index ff7e064bc..a752cc753 100644
--- a/src/main/java/calculator/util/StringHandler.java
+++ b/src/main/java/calculator/util/StringHandler.java
@@ -6,26 +6,35 @@
 
 public class StringHandler {
     public String extractSeparator(String input) {
-        int start = "//".length() ;
-        int end = input.indexOf("\\n");
+        int start = Constants.CUSTOM_PREFIX.length() ;
+        int end = input.indexOf(Constants.CUSTOM_SUFFIX);
         return input.substring(start, end);
     }
 
     public List<String> getNumbers(List<String> separators, String input) {
-        List<String> splitInput = new ArrayList<>(Arrays.asList(input));
+        List<String> splitInput = new ArrayList<>();
+        splitInput.add(input);
 
         for (String separator : separators) {
-            List<String> tempResult = new ArrayList<>();
-            for (String part : splitInput) {
-                tempResult.addAll(Arrays.asList(part.split(separator)));
-            }
-            splitInput = tempResult;
+            splitInput = splitBySeparator(splitInput, separator);
         }
+
         return splitInput;
     }
 
+    private List<String> splitBySeparator(List<String> inputList, String separator) {
+        List<String> result = new ArrayList<>();
+
+        for (String part : inputList) {
+            String[] splitParts = part.split(separator);
+            result.addAll(Arrays.asList(splitParts));
+        }
+
+        return result;
+    }
+
     public String removeCustom(String input) {
-        int end = input.indexOf("\\n") + 2;
-        return input.substring(end);
+        int numberIndex = input.indexOf(Constants.CUSTOM_SUFFIX) + 2;
+        return input.substring(numberIndex);
     }
 }
diff --git a/src/main/java/calculator/util/Validator.java b/src/main/java/calculator/util/Validator.java
index 9bc9ff5f9..e25736cfc 100644
--- a/src/main/java/calculator/util/Validator.java
+++ b/src/main/java/calculator/util/Validator.java
@@ -5,7 +5,7 @@ public boolean hasCustomSeparator(String input) {
         if (isEmpty(input)) {
             return false;
         }
-        return input.startsWith("//") && input.contains("\\n");
+        return input.startsWith(Constants.CUSTOM_PREFIX) && input.contains(Constants.CUSTOM_SUFFIX);
     }
 
     public boolean isStartWithDigit(String input) {
@@ -20,13 +20,10 @@ public boolean isEmpty(String input) {
     }
 
     public void validateSeparator(String separator) {
-        if (separator.length() != 1) {
+        if (separator.length() != Constants.SEPARATOR_LENGTH) {
             throw new IllegalArgumentException("구분자의 길이는 1이어야 합니다.");
         }
-        if (separator.equals(",") || separator.equals(":")) {
-            throw new IllegalArgumentException("이미 구분자로 등록 되어 있습니다.");
-        }
-        if (separator.equals(".")) {
+        if (separator.equals(Constants.DECIMAL_POINT)) {
             throw new IllegalArgumentException(".은 구분자가 될 수 없습니다.");
         }
         if (isStartWithDigit(separator)) {
@@ -41,8 +38,10 @@ public void validateInput(String input) {
         if (hasCustomSeparator(input)) {
             return;
         }
-        if (isStartWithDigit(input) && (!input.contains("//") && !input.contains("\\n"))) {
-            return;
+        if (isStartWithDigit(input)) {
+            if ((!input.contains(Constants.CUSTOM_PREFIX) && !input.contains(Constants.CUSTOM_SUFFIX))) {
+                return;
+            }
         }
         throw new IllegalArgumentException("포멧에 맞게 입력해 주세요.(ex://@\\n1@2:3,4)");
     }

From 4115bc9142cd287b50101184f38fe76c915fa859 Mon Sep 17 00:00:00 2001
From: GO-TE <alsrudxo9810@naver.com>
Date: Mon, 21 Oct 2024 17:55:11 +0900
Subject: [PATCH 33/33] =?UTF-8?q?docs:=20=EA=B5=AC=ED=98=84=20=EC=99=84?=
 =?UTF-8?q?=EB=A3=8C=20=EC=B2=B4=ED=81=AC?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index 06163fa80..28b3d5439 100644
--- a/README.md
+++ b/README.md
@@ -46,12 +46,12 @@
 ---
 ## 리팩토링
 
-- [ ] 하드 코딩 제거
-- [ ] 코딩 컨벤션 준수
-- [ ] 이상한 수식 넣었을 때 에러
+- [X] 하드 코딩 제거
+- [X] 코딩 컨벤션 준수
+- [X] 이상한 수식 넣었을 때 에러
   ```
   덧셈할 문자열을 입력해 주세요.
   //;\n112kio12u328948
   Exception in thread "main" java.lang.NumberFormatException: For input string: "112kio12u328948"
   ```
-- [ ] 기능 쪼개기
\ No newline at end of file
+- [ ] 기능 쪼개기 
\ No newline at end of file