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cpp_primer_plus/1.基础知识.ipynb

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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "c542536e",
+   "metadata": {},
+   "source": [
+    "## 如何编译\n",
+    "\n",
+    "linux的编译命令如下\n",
+    "\n",
+    "```\n",
+    "g++ spiffy.cxx\n",
+    "\n",
+    "# 如果需要链接c++库\n",
+    "g++ spiffy.cxx -lg++\n",
+    "# 如果要编译多个源文件\n",
+    "g++ my.cxx precious.cxx\n",
+    "# 这将生成一个名为a.out的可执行文件和两个目标代码文件my.o和\n",
+    "precious.o。如果接下来修改了其中的某个源代码文件，如mu.cxx，则可\n",
+    "以使用my.cxx和precious.o来重新编译：\n",
+    "g++ my.cxx precious.o\n",
+    "```\n",
+    "\n",
+    "## 2.1 进入C++"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 9,
+   "id": "c253c5aa",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "这个是c++\n"
+     ]
+    }
+   ],
+   "source": [
+    "// 这个是一个最简单的程序\n",
+    "#include <iostream>\n",
+    "int main(){\n",
+    "    using namespace std;\n",
+    "    cout<<\"这个是c++\"<<endl;\n",
+    "    return 0;\n",
+    "}\n",
+    "main();"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "cedc3261",
+   "metadata": {},
+   "source": [
+    "一般情况下，程序里必须要使用main函数来作为入口函数"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 10,
+   "id": "e1ea7557",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "// c++的注释\n",
+    "/*注释*/"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "id": "3be3508d",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "// include是编译指令，表示我们引入一些内容\n",
+    "#include <iostream>"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 19,
+   "id": "5de02721",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "不使用命名空间\n",
+      "使用命名空间"
+     ]
+    }
+   ],
+   "source": [
+    "// namespace表示命名空间，主要用于区分不同模块\n",
+    "using namespace std;\n",
+    "std::cout<<\"不使用命名空间\"<<endl;\n",
+    "cout<<\"使用命名空间\";"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 20,
+   "id": "41639903",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "测试"
+     ]
+    }
+   ],
+   "source": [
+    "// 也可以只使用某一个\n",
+    "using std::cout;\n",
+    "cout<<\"测试\";"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 21,
+   "id": "13e42e18",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "你好\n",
+      "世界"
+     ]
+    }
+   ],
+   "source": [
+    "// endl表示换行符\n",
+    "cout<<\"你好\"<<endl<<\"世界\";"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 23,
+   "id": "ae4d1057",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "你好\n",
+      "世界"
+     ]
+    }
+   ],
+   "source": [
+    "// 也可以使用\\n\n",
+    "cout<<\"你好\\n世界\";"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "01a54628",
+   "metadata": {},
+   "source": [
+    "## 2.2 C++语句"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 26,
+   "id": "f23b63b7",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "// 声明一个变量\n",
+    "int a;"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 28,
+   "id": "3c2ec0b0",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "64"
+     ]
+    }
+   ],
+   "source": [
+    "// 变量赋值\n",
+    "a = 64;\n",
+    "cout<<a;"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 30,
+   "id": "026b9a61",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "888888"
+     ]
+    }
+   ],
+   "source": [
+    "// 也可以连续赋值\n",
+    "int a;\n",
+    "int b;\n",
+    "int c;\n",
+    "a=b=c=88;\n",
+    "cout<<a<<b<<c;"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "c1058390",
+   "metadata": {},
+   "source": [
+    "## 2.3 其他c++语句"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 33,
+   "id": "d86e5154",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "输入一个值456\n",
+      "你输入的值为456"
+     ]
+    }
+   ],
+   "source": [
+    "// 使用cin来输入\n",
+    "int a;\n",
+    "cout << \"输入一个值\";\n",
+    "cin >> a;\n",
+    "cout << \"你输入的值为\"<<a;"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 35,
+   "id": "d0f08a43",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "abcd"
+     ]
+    }
+   ],
+   "source": [
+    "// cout可以这样\n",
+    "cout << \"a\"\n",
+    "    <<\"b\"\n",
+    "    <<\"c\"\n",
+    "    <<\"d\";"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d7a9fd0f",
+   "metadata": {},
+   "source": [
+    "## 2.4函数"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "16f5b9d4",
+   "metadata": {},
+   "source": [
+    "#include <cmath>"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 61,
+   "id": "bc2b8ae5",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "praram:456"
+     ]
+    }
+   ],
+   "source": [
+    "// 自定义函数\n",
+    "void simon(int n){\n",
+    "    cout<<\"praram:\"<<n;\n",
+    "}\n",
+    "simon(456);"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 62,
+   "id": "15460b0a",
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "100"
+     ]
+    }
+   ],
+   "source": [
+    "int testReturn(int a){\n",
+    "    return a*10;\n",
+    "}\n",
+    "cout<<testReturn(10);"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "375203ea",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "C++17",
+   "language": "C++17",
+   "name": "xcpp17"
+  },
+  "language_info": {
+   "codemirror_mode": "text/x-c++src",
+   "file_extension": ".cpp",
+   "mimetype": "text/x-c++src",
+   "name": "c++",
+   "version": "17"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}