帮我用c++ 写一个学生管理系统

好的，我可以为您编写一个学生管理系统。首先，您需要定义学生的结构体，包括学生的姓名、学号、年龄、性别等信息。然后，您可以使用链表或数组来存储学生信息。接下来，您可以编写一些函数来实现添加、删除、修改和查询学生信息的功能。最后，您可以编写一个主函数来调用这些函数，以实现完整的学生管理系统。以下是示例代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX_NAME_LEN 20
#define MAX_ID_LEN 10

typedef struct student {
    char name[MAX_NAME_LEN];
    char id[MAX_ID_LEN];
    int age;
    char gender;
    struct student *next;
} Student;

Student *head = NULL;

void add_student() {
    Student *new_student = (Student *)malloc(sizeof(Student));
    printf("请输入学生姓名：");
    scanf("%s", new_student->name);
    printf("请输入学生学号：");
    scanf("%s", new_student->id);
    printf("请输入学生年龄：");
    scanf("%d", &new_student->age);
    printf("请输入学生性别（M/F）：");
    scanf(" %c", &new_student->gender);
    new_student->next = head;
    head = new_student;
    printf("添加成功！\n");
}

void delete_student() {
    char id[MAX_ID_LEN];
    printf("请输入要删除的学生学号：");
    scanf("%s", id);
    Student *prev = NULL;
    Student *curr = head;
    while (curr != NULL) {
        if (strcmp(curr->id, id) == 0) {
            if (prev == NULL) {
                head = curr->next;
            } else {
                prev->next = curr->next;
            }
            free(curr);
            printf("删除成功！\n");
            return;
        }
        prev = curr;
        curr = curr->next;
    }
    printf("未找到该学生！\n");
}

void modify_student() {
    char id[MAX_ID_LEN];
    printf("请输入要修改的学生学号：");
    scanf("%s", id);
    Student *curr = head;
    while (curr != NULL) {
        if (strcmp(curr->id, id) == 0) {
            printf("请输入学生姓名：");
            scanf("%s", curr->name);
            printf("请输入学生年龄：");
            scanf("%d", &curr->age);
            printf("请输入学生性别（M/F）：");
            scanf(" %c", &curr->gender);
            printf("修改成功！\n");
            return;
        }
        curr = curr->next;
    }
    printf("未找到该学生！\n");
}

void query_student() {
    char id[MAX_ID_LEN];
    printf("请输入要查询的学生学号：");
    scanf("%s", id);
    Student *curr = head;
    while (curr != NULL) {
        if (strcmp(curr->id, id) == 0) {
            printf("姓名：%s\n", curr->name);
            printf("学号：%s\n", curr->id);
            printf("年龄：%d\n", curr->age);
            printf("性别：%c\n", curr->gender);
            return;
        }
        curr = curr->next;
    }
    printf("未找到该学生！\n");
}

void print_all_students() {
    Student *curr = head;
    while (curr != NULL) {
        printf("姓名：%s\n", curr->name);
        printf("学号：%s\n", curr->id);
        printf("年龄：%d\n", curr->age);
        printf("性别：%c\n", curr->gender);
        printf("\n");
        curr = curr->next;
    }
}

int main() {
    int choice;
    while (1) {
        printf("请选择操作：\n");
        printf("1. 添加学生\n");
        printf("2. 删除学生\n");
        printf("3. 修改学生\n");
        printf("4. 查询学生\n");
        printf("5. 显示所有学生\n");
        printf("6. 退出程序\n");
        scanf("%d", &choice);
        switch (choice) {
            case 1:
                add_student();
                break;
            case 2:
                delete_student();
                break;
            case 3:
                modify_student();
                break;
            case 4:
                query_student();
                break;
            case 5:
                print_all_students();
                break;
            case 6:
                exit(0);
            default:
                printf("无效的选择！\n");
        }
    }
    return 0;
}