使用C＋＋来完成这个编程

好的，以下是一个简单的C++程序，实现了学生成绩管理系统的基本功能。你可以在此基础上进行修改和扩展。

#include <iostream>
#include <fstream>
#include <cstring>
#include <iomanip>

using namespace std;

struct Student {
    char id[12];  // 学号
    char name[21];  // 姓名
    char gender;  // 性别
    double score;  // 成绩
};

const int MAX_SIZE = 100;  // 学生记录的最大数量
Student students[MAX_SIZE];  // 学生记录数组
int size = 0;  // 学生记录数量

void addStudent() {  // 添加学生记录
    if (size == MAX_SIZE) {
        cout << "学生记录已满，无法添加！" << endl;
        return;
    }
    cout << "请输入学生信息：" << endl;
    cout << "学号：";
    cin >> students[size].id;
    cout << "姓名：";
    cin >> students[size].name;
    cout << "性别(m/f)：";
    cin >> students[size].gender;
    cout << "成绩：";
    cin >> students[size].score;
    size++;
    cout << "添加成功！" << endl;
}

void displayStudents() {  // 显示学生记录
    if (size == 0) {
        cout << "学生记录为空！" << endl;
        return;
    }
    cout << left << setw(12) << "学号" << setw(21) << "姓名" << setw(6) << "性别" << setw(8) << "成绩" << endl;
    for (int i = 0; i < size; i++) {
        cout << left << setw(12) << students[i].id << setw(21) << students[i].name << setw(6) << students[i].gender << setw(8) << students[i].score << endl;
    }
}

void searchStudent() {  // 查找学生记录
    if (size == 0) {
        cout << "学生记录为空！" << endl;
        return;
    }
    char id[12];
    cout << "请输入要查找的学生学号：";
    cin >> id;
    bool found = false;
    for (int i = 0; i < size; i++) {
        if (strcmp(students[i].id, id) == 0) {
            cout << left << setw(12) << "学号" << setw(21) << "姓名" << setw(6) << "性别" << setw(8) << "成绩" << endl;
            cout << left << setw(12) << students[i].id << setw(21) << students[i].name << setw(6) << students[i].gender << setw(8) << students[i].score << endl;
            found = true;
            break;
        }
    }
    if (!found) {
        cout << "未找到该学生记录！" << endl;
    }
}

void deleteStudent() {  // 删除学生记录
    if (size == 0) {
        cout << "学生记录为空！" << endl;
        return;
    }
    char id[12];
    cout << "请输入要删除的学生学号：";
    cin >> id;
    bool found = false;
    for (int i = 0; i < size; i++) {
        if (strcmp(students[i].id, id) == 0) {
            for (int j = i; j < size - 1; j++) {
                students[j] = students[j + 1];
            }
            size--;
            found = true;
            cout << "删除成功！" << endl;
            break;
        }
    }
    if (!found) {
        cout << "未找到该学生记录！" << endl;
    }
}

void saveStudents() {  // 保存学生记录到文件
    ofstream fout("students.txt");
    if (!fout) {
        cout << "无法打开文件！" << endl;
        return;
    }
    for (int i = 0; i < size; i++) {
        fout << students[i].id << " " << students[i].name << " " << students[i].gender << " " << students[i].score << endl;
    }
    fout.close();
    cout << "保存成功！" << endl;
}

void loadStudents() {  // 从文件中加载学生记录
    ifstream fin("students.txt");
    if (!fin) {
        cout << "无法打开文件！" << endl;
        return;
    }
    size = 0;
    while (fin >> students[size].id >> students[size].name >> students[size].gender >> students[size].score) {
        size++;
    }
    fin.close();
    cout << "加载成功！" << endl;
}

void exportStudents() {  // 导出学生记录到文件
    ofstream fout("students.csv");
    if (!fout) {
        cout << "无法打开文件！" << endl;
        return;
    }
    fout << "学号,姓名,性别,成绩" << endl;
    for (int i = 0; i < size; i++) {
        fout << students[i].id << "," << students[i].name << "," << students[i].gender << "," << students[i].score << endl;
    }
    fout.close();
    cout << "导出成功！" << endl;
}

int main() {
    int choice;
    while (true) {
        cout << "学生成绩管理系统" << endl;
        cout << "1.添加学生记录" << endl;
        cout << "2.显示学生记录" << endl;
        cout << "3.查找学生记录" << endl;
        cout << "4.删除学生记录" << endl;
        cout << "5.保存学生记录" << endl;
        cout << "6.导出学生记录" << endl;
        cout << "0.退出程序" << endl;
        cout << "请选择操作：";
        cin >> choice;
        switch (choice) {
            case 1:
                addStudent();
                break;
            case 2:
                displayStudents();
                break;
            case 3:
                searchStudent();
                break;
            case 4:
                deleteStudent();
                break;
            case 5:
                saveStudents();
                break;
            case 6:
                exportStudents();
                break;
            case 0:
                cout << "程序已退出！" << endl;
                return 0;
            default:
                cout << "请输入正确的操作！" << endl;
                break;
        }
    }
    return 0;
}

该程序使用了结构体存储学生记录，实现了添加、显示、查找、删除、保存和导出学生记录的功能，并提供了一个主菜单。你可以根据需要对其进行修改和扩展。