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学生管理系统 #include<stdio.h> #include<stdlib.h> #include<string.h> #pragma warning(disable:4996)

#define N 1024 #define MAXSIZE 32 #define WIDESIZE 65

typedef struct Student { int code; char name[MAXSIZE]; int age; char sex[MAXSIZE]; int math; int chinese; int english; struct Student* next; }Student;

Student* createList() { Student* studentList = (Student*)malloc(sizeof(Student)); return studentList; }

Student* createNode() { Student* newStu = (Student*)malloc(sizeof(Student)); printf("学号:"); scanf("%d", &newStu->code); printf("姓名:"); scanf("%s", newStu->name); printf("年龄:"); scanf("%d", &newStu->age); printf("性别:"); scanf("%s", newStu->sex); printf("数学:"); scanf("%d", &newStu->math); printf("语文:"); scanf("%d", &newStu->chinese); printf("英语:"); scanf("%d", &newStu->english); newStu->next = NULL; return newStu; }

void fenge() { printf("=====================================\n"); }

void showMsg(Student* stu) { printf("%d\t%s\t%d\t%s\t%d\t%d\t%d\n", stu->code, stu->name, stu->age, stu->sex, stu->math, stu->chinese, stu->english); }

Student* insertStudent(Student* head) { int i, count; printf("请输入录入学生的人数"); scanf("%d", &count); Student* tail = head; if (head) { for (i = 0;i < count;i++) { printf("=============输入第%d个学生的信息=============\n", i + 1); Student* newNode = createNode(); tail->next = newNode; tail = tail->next; } } else { while (tail) { tail = tail->next; } for (i = 0;i < count;i++) { printf("=============请输入第%d个学生的信息=============\n", i + 1); Student* newNode = createNode(); tail->next = newNode; tail = tail->next; } }

printf("\t=========================\t\n");
return head;

}

void deleteStudent(Student * studentList) { printf("请输入学号:"); int ditCode; scanf("%d", &ditCode); Student* preStudent = studentList; Student* afterStudent = studentList->next; if (afterStudent) { while(afterStudent ) { if (afterStudent->code == ditCode) { preStudent->next = afterStudent->next; free(afterStudent); break; } else { preStudent = afterStudent; afterStudent = afterStudent->next; } } } else { printf("没有这名学生的信息！"); } printf("\t=========================\t\n"); fenge(); }

void changeName(Student* stu) { char newName[MAXSIZE]; printf("请输入新的名字:"); scanf("%s", newName); strcpy(stu->name, newName); showMsg(stu); printf("\t=========================\t\n"); fenge(); }

void changeAge(Student* stu) { int newAge; printf("请输入新的年龄:"); scanf("%d", &newAge); stu->age = newAge; showMsg(stu); printf("\t=========================\t\n"); fenge(); }

void changeMathScore(Student* stu) { int newSocre; printf("请输入新的数学成绩:"); scanf("%d", &newSocre); stu->math = newSocre; showMsg(stu); printf("\t=========================\t\n"); fenge();

}

void changeChineseScore(Student* stu) { int newSocre; printf("请输入新的语文成绩:"); scanf("%d", &newSocre); stu->chinese = newSocre; showMsg(stu); printf("\t=========================\t\n"); fenge(); }

void changeEnglishScore(Student* stu) { int newSocre; printf("请输入新的英语成绩:"); scanf("%d", &newSocre); stu->chinese = newSocre; showMsg(stu); printf("\t=========================\t\n"); fenge(); }

void editStudent(Student* studentList) { printf("请输入学号:"); int ditCode; scanf("%d", &ditCode); Student* ditStu = studentList->next; if (ditStu != NULL) { while (ditStu != NULL) { if (ditStu->code == ditCode) { printf("请输入修改信息编号:\n1.姓名\n2.年龄\n3.数学\n4.语文\n5.英语\n"); int number; scanf("%d", &number); switch (number) { case 1: changeName(ditStu); break; case 2: changeAge(ditStu); break; case 3:changeMathScore(ditStu); break; case 4:changeChineseScore(ditStu); break; case 5: changeEnglishScore(ditStu); break; default: printf("输入内容无效！"); } } ditStu = ditStu->next; } } else { printf("抱歉，你还未录入学生信息，请先录入学生信息！\n"); } printf("\t=========================\t\n"); fenge(); }

//根据学生编号查找学生信息 void findStudent(Student* studentList) { printf("请输入学号:"); int code; scanf("%d", &code); Student* ditStu = studentList->next; if (ditStu != NULL) { while (ditStu != NULL) { if (ditStu->code != code) { ditStu = ditStu->next; } else { showMsg(ditStu); break; } } } else { printf("没有这名学生的信息！"); } printf("\t=========================\t\n"); fenge(); }

void showStudent(Student* studentList) { Student* temp = studentList->next; printf("学号\t姓名\t年龄\t性别\t数学\t语文\t英语\n"); while (temp != NULL) { showMsg(temp); temp = temp->next; } printf("\n"); printf("\t=========================\t\n"); fenge();

}

void saveStudent(Student* studentList) { FILE* fp = NULL; fp = fopen("D:\C\studentMsg.txt", "a+"); Student* stu = studentList->next; char title[N] = "学号\t姓名\t年龄\t性别\t数学\t语文\t英语\n"; fprintf(fp, "%s", title); while (stu != NULL) { fprintf(fp, "%d\t%s\t%d\t%s\t%d\t%d\t%d\n", stu->code, stu->name, stu->age, stu->sex,stu->math, stu->chinese, stu->english); stu = stu->next;

}
fclose(fp);
printf("\t=========================\t\n");
fenge();

}

void showHelp() { printf("1.此系统可以对学生信息进行管理。\n"); printf("2.输入对应功能项的编号即可进行不同功能的系统操作。\N"); printf("\t=========================\t\n"); fenge(); }

void showMenu() { int i; printf("----------------------------"); printf("\t欢迎使用学生管理系统\t"); printf("----------------------\n"); printf("\t"); for (i = 0;i < WIDESIZE;i++) { printf("*");

}
printf("\n");
printf("\t*\t0.系统帮助及说明\t**");
printf("\t1.刷新学生信息\t\t*\t\n");
printf("\t*\t2.查询学生信息\t\t");
printf("**\t3.修改学生信息\t\t*\n");
printf("\t*\t4.增加学生信息\t\t**");
printf("\t5.按学号删除信息\t*\n");
printf("\t*\t6.显示所有学生信息\t**");
printf("\t7.保存当前信息\t\t*\n");
printf("\t*\t8.推出学生管理系统\t**");
for (i = 0;i < 4;i++)
{
	printf("\t");
}
printf("*\n");
printf("\t");
for (i = 0; i < WIDESIZE; i++)
{
	printf("*");
}
printf("\n");
	printf("---------------------");
	printf("\t2020 xiaohai\t");
	printf("---------------------\n");
	printf("请按所需输入菜单编号:");

}

int main(int argc, char const* argv[]) { int choice; Student* studentList = createList(); do { showMenu(); scanf("%d", &choice); switch (choice) { case 0:showHelp(); fenge(); break; case 1:printf("刷新完成！\n"); fenge(); break; case 2:findStudent(studentList); fenge(); break; case 3:editStudent(studentList); fenge(); break; case 4:insertStudent(studentList); fenge(); break; case 5:deleteStudent(studentList); fenge(); break; case 6:showStudent(studentList); fenge(); break; case 7:saveStudent(studentList); fenge(); break; default: exit(1); } } while (1); return 0; }