用c语言代码写一个完整的学生信息管理系统

### 回答1：

可以参考以下的代码：
#include <stdio.h>
int main()
{
int choice;
struct student
{
char name[30];
int age;
float marks;
};
struct student s[10];
printf("*** Student Management System ***\n");
while(1)
{
printf("1. Add Student\n");
printf("2. List Students\n");
printf("3. Delete Student\n");
printf("4. Exit\n");
printf("Enter your choice:");
scanf("%d", &choice);
switch(choice)
{
case 1:
// code to add student
break;
case 2:
// code to list student
break;
case 3:
// code to delete student
break;
case 4:
exit(0);
default:
printf("Invalid choice\n");
}
}
return 0;
}

### 回答2：
#include <stdio.h>
#include <stdlib.h>

#define MAX_STUDENTS 100

typedef struct {
char name[100];
int age;
int id;
} Student;

typedef struct {
Student students[MAX_STUDENTS];
int count;
} StudentDatabase;

void addStudent(StudentDatabase *db, char *name, int age, int id) {
if (db->count == MAX_STUDENTS) {
printf("学生信息已满，无法添加新学生\n");
return;
}

Student newStudent;
strcpy(newStudent.name, name);
newStudent.age = age;
newStudent.id = id;

db->students[db->count] = newStudent;
db->count++;

printf("学生 %s 成功添加到数据库\n", newStudent.name);
}

void removeStudent(StudentDatabase *db, int id) {
for (int i = 0; i < db->count; i++) {
if (db->students[i].id == id) {
printf("学生 %s 成功从数据库中删除\n", db->students[i].name);
for (int j = i; j < db->count - 1; j++) {
db->students[j] = db->students[j + 1];
}
db->count--;
return;
}
}
printf("未找到该学生的信息\n");
}

void displayStudents(StudentDatabase *db) {
printf("数据库中的学生信息如下：\n");
for (int i = 0; i < db->count; i++) {
printf("学生姓名：%s\n", db->students[i].name);
printf("学生年龄：%d\n", db->students[i].age);
printf("学生学号：%d\n", db->students[i].id);
printf("\n");
}
}

int main() {
StudentDatabase db;
db.count = 0;

addStudent(&db, "张三", 20, 10001);
addStudent(&db, "李四", 19, 10002);
addStudent(&db, "王五", 21, 10003);

displayStudents(&db);

removeStudent(&db, 10002);

displayStudents(&db);

return 0;
}

### 回答3：
学生信息管理系统是一个用来管理学生信息的应用程序，通常包括添加学生信息、查找学生信息、删除学生信息以及修改学生信息等功能。下面是一个简单的用C语言编写的学生信息管理系统的示例代码：

#include <stdio.h>

struct Student {
    char name[20];
    int age;
    int score;
};

void printMenu() {
    printf("********** 学生信息管理系统 **********\n");
    printf("1. 添加学生信息\n");
    printf("2. 查找学生信息\n");
    printf("3. 删除学生信息\n");
    printf("4. 修改学生信息\n");
    printf("5. 退出\n");
    printf("************************************\n");
}

void addStudent(struct Student students[], int* count) {
    printf("请输入学生姓名：");
    scanf("%s", students[*count].name);
    printf("请输入学生年龄：");
    scanf("%d", &students[*count].age);
    printf("请输入学生成绩：");
    scanf("%d", &students[*count].score);

    *count += 1;
    printf("添加成功！\n");
}

void findStudent(struct Student students[], int count) {
    char name[20];
    printf("请输入要查找的学生姓名：");
    scanf("%s", name);

    for (int i = 0; i < count; i++) {
        if (strcmp(students[i].name, name) == 0) {
            printf("姓名：%s\n", students[i].name);
            printf("年龄：%d\n", students[i].age);
            printf("成绩：%d\n", students[i].score);
            return;
        }
    }

    printf("未找到该学生！\n");
}

void deleteStudent(struct Student students[], int* count) {
    char name[20];
    printf("请输入要删除的学生姓名：");
    scanf("%s", name);

    for (int i = 0; i < *count; i++) {
        if (strcmp(students[i].name, name) == 0) {
            for (int j = i; j < *count - 1; j++) {
                students[j] = students[j + 1];
            }
            *count -= 1;
            printf("删除成功！\n");
            return;
        }
    }

    printf("未找到该学生！\n");
}

void modifyStudent(struct Student students[], int count) {
    char name[20];
    printf("请输入要修改的学生姓名：");
    scanf("%s", name);

    for (int i = 0; i < count; i++) {
        if (strcmp(students[i].name, name) == 0) {
            printf("请输入学生姓名：");
            scanf("%s", students[i].name);
            printf("请输入学生年龄：");
            scanf("%d", &students[i].age);
            printf("请输入学生成绩：");
            scanf("%d", &students[i].score);
            printf("修改成功！\n");
            return;
        }
    }

    printf("未找到该学生！\n");
}

int main() {
    struct Student students[100];
    int count = 0;
    int choice;

    while (1) {
        printMenu();
        printf("请输入您的选择：");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                addStudent(students, &count);
                break;
            case 2:
                findStudent(students, count);
                break;
            case 3:
                deleteStudent(students, &count);
                break;
            case 4:
                modifyStudent(students, count);
                break;
            case 5:
                return 0;
            default:
                printf("无效的选择！\n");
        }

        printf("\n");
    }

    return 0;
}

该示例代码包括了添加学生信息、查找学生信息、删除学生信息以及修改学生信息等功能。用户可以根据菜单选择需要的操作，然后按照提示进行相应的操作。这段代码使用了结构体来存储学生信息，并通过数组来管理多个学生的信息。