设计一个学生通讯管理系统

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

#define MAX_SIZE 100

// 定义学生结构体
typedef struct {
    int id;
    char name[50];
    char phone[20];
} Student;

// 定义通讯录结构体
typedef struct {
    Student students[MAX_SIZE];
    int count;
} AddressBook;

// 创建通讯录
void createAddressBook(AddressBook *book) {
    book->count = 0;
}

// 插入学生信息
void insertStudent(AddressBook *book) {
    if (book->count >= MAX_SIZE) {
        printf("通讯录已满，无法插入学生信息！\n");
        return;
    }

    Student student;

    printf("请输入学号：");
    scanf("%d", &student.id);

    printf("请输入姓名：");
    scanf("%s", student.name);

    printf("请输入电话号码：");
    scanf("%s", student.phone);

    book->students[book->count++] = student;

    printf("学生信息插入成功！\n");
}

// 删除学生信息
void deleteStudent(AddressBook *book) {
    int id;

    printf("请输入要删除的学生学号：");
    scanf("%d", &id);

    int index = -1;

    for (int i = 0; i < book->count; i++) {
        if (book->students[i].id == id) {
            index = i;
            break;
        }
    }

    if (index == -1) {
        printf("学生学号不存在，删除失败！\n");
        return;
    }

    for (int i = index; i < book->count - 1; i++) {
        book->students[i] = book->students[i + 1];
    }

    book->count--;

    printf("学生信息删除成功！\n");
}

// 根据学号查找学生信息
void findStudentById(AddressBook *book) {
    int id;

    printf("请输入要查找的学生学号：");
    scanf("%d", &id);

    int index = -1;

    for (int i = 0; i < book->count; i++) {
        if (book->students[i].id == id) {
            index = i;
            break;
        }
    }

    if (index == -1) {
        printf("学生学号不存在！\n");
        return;
    }

    Student student = book->students[index];

    printf("学号：%d\n", student.id);
    printf("姓名：%s\n", student.name);
    printf("电话号码：%s\n", student.phone);
}

// 显示所有学生信息
void displayStudents(AddressBook *book) {
    if (book->count == 0) {
        printf("通讯录为空！\n");
        return;
    }

    printf("学生信息如下：\n");

    for (int i = 0; i < book->count; i++) {
        Student student = book->students[i];
        printf("学号：%d，姓名：%s，电话号码：%s\n", student.id, student.name, student.phone);
    }
}

int main() {
    AddressBook book;
    int choice;

    createAddressBook(&book);

    do {
        printf("\n====== 学生通讯录管理系统 ======\n");
        printf("1. 创建通讯录\n");
        printf("2. 插入学生信息\n");
        printf("3. 删除学生信息\n");
        printf("4. 根据学号查找学生信息\n");
        printf("5. 显示所有学生信息\n");
        printf("0. 退出系统\n");
        printf("请输入您的选择：");
        scanf("%d", &choice);

        switch (choice) {
            case 1:
                createAddressBook(&book);
                printf("通讯录创建成功！\n");
                break;
            case 2:
                insertStudent(&book);
                break;
            case 3:
                deleteStudent(&book);
                break;
            case 4:
                findStudentById(&book);
                break;
            case 5:
                displayStudents(&book);
                break;
            case 0:
                printf("感谢使用学生通讯录管理系统，再见！\n");
                break;
            default:
                printf("输入有误，请重新选择！\n");
                break;
        }
    } while (choice != 0);

    return 0;
}