c++教务系统简易

这里提供一个简单的 C++ 教务系统实现，包括学生信息的录入、查询和修改功能。

#include <iostream>
#include <string>
using namespace std;

struct Student {
    string name;
    int age;
    string major;
};

void add_student(Student students[], int& count) {
    cout << "请输入学生姓名：";
    cin >> students[count].name;
    cout << "请输入学生年龄：";
    cin >> students[count].age;
    cout << "请输入学生专业：";
    cin >> students[count].major;
    count++;
    cout << "添加成功！" << endl;
}

void print_student(Student student) {
    cout << "姓名：" << student.name << endl;
    cout << "年龄：" << student.age << endl;
    cout << "专业：" << student.major << endl;
}

void query_student(Student students[], int count) {
    string name;
    cout << "请输入要查询的学生姓名：";
    cin >> name;
    for (int i = 0; i < count; i++) {
        if (students[i].name == name) {
            print_student(students[i]);
            return;
        }
    }
    cout << "未找到该学生！" << endl;
}

void modify_student(Student students[], int count) {
    string name;
    cout << "请输入要修改的学生姓名：";
    cin >> name;
    for (int i = 0; i < count; i++) {
        if (students[i].name == name) {
            cout << "请输入新的学生姓名：";
            cin >> students[i].name;
            cout << "请输入新的学生年龄：";
            cin >> students[i].age;
            cout << "请输入新的学生专业：";
            cin >> students[i].major;
            cout << "修改成功！" << endl;
            return;
        }
    }
    cout << "未找到该学生！" << endl;
}

int main() {
    Student students[100];
    int count = 0;
    while (true) {
        int choice;
        cout << "请选择操作：" << endl;
        cout << "1. 添加学生" << endl;
        cout << "2. 查询学生" << endl;
        cout << "3. 修改学生信息" << endl;
        cout << "4. 退出" << endl;
        cin >> choice;
        if (choice == 1) {
            add_student(students, count);
        } else if (choice == 2) {
            query_student(students, count);
        } else if (choice == 3) {
            modify_student(students, count);
        } else if (choice == 4) {
            break;
        } else {
            cout << "输入错误，请重新输入！" << endl;
        }
    }
    return 0;
}

该程序定义了一个 `Student` 结构体，包含学生的姓名、年龄和专业。`add_student` 函数用来添加一个新学生，将学生信息存储在数组中，`query_student` 函数用来查询指定学生的信息，`modify_student` 函数用来修改指定学生的信息。主函数中使用循环来提供操作选择，用户可以选择添加学生、查询学生、修改学生信息或退出程序。