请用c++代码实现学生信息管理系统，并且可以保存到本地数据

好的，以下是一个简单的学生信息管理系统的C++代码实现，同时也可以保存到本地数据。

#include <iostream>
#include <fstream>
#include <string>
#include <vector>

using namespace std;

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

void addStudent(vector<Student>& students) {
    Student student;
    cout << "请输入学生姓名：";
    cin >> student.name;
    cout << "请输入学生年龄：";
    cin >> student.age;
    cout << "请输入学生成绩：";
    cin >> student.score;
    students.push_back(student);
    cout << "添加成功！" << endl;
}

void delStudent(vector<Student>& students) {
    string name;
    cout << "请输入要删除的学生姓名：";
    cin >> name;
    for (auto it = students.begin(); it != students.end(); ++it) {
        if (it->name == name) {
            students.erase(it);
            cout << "删除成功！" << endl;
            return;
        }
    }
    cout << "未找到该学生！" << endl;
}

void modifyStudent(vector<Student>& students) {
    string name;
    cout << "请输入需要修改成绩的学生姓名：";
    cin >> name;
    for (auto it = students.begin(); it != students.end(); ++it) {
        if (it->name == name) {
            cout << "请输入修改后的成绩：";
            cin >> it->score;
            cout << "修改成功！" << endl;
            return;
        }
    }
    cout << "未找到该学生！" << endl;
}

void queryStudent(vector<Student>& students) {
    string name;
    cout << "请输入需要查询的学生姓名：";
    cin >> name;
    for (auto it = students.begin(); it != students.end(); ++it) {
        if (it->name == name) {
            cout << "姓名：" << it->name << " 年龄：" << it->age << " 成绩：" << it->score << endl;
            return;
        }
    }
    cout << "未找到该学生！" << endl;
}

void listStudent(vector<Student>& students) {
    cout << "学生列表：" << endl;
    for (auto it = students.begin(); it != students.end(); ++it) {
        cout << "姓名：" << it->name << " 年龄：" << it->age << " 成绩：" << it->score << endl;
    }
}

void saveToFile(vector<Student>& students) {
    ofstream file("students.txt");
    for (auto it = students.begin(); it != students.end(); ++it) {
        file << it->name << " " << it->age << " " << it->score << endl;
    }
    file.close();
    cout << "保存成功！" << endl;
}

void loadFromFile(vector<Student>& students) {
    ifstream file("students.txt");
    if (!file.is_open()) {
        cout << "文件不存在！" << endl;
        return;
    }
    students.clear();
    string line;
    while (getline(file, line)) {
        Student student;
        sscanf(line.c_str(), "%s %d %d", &student.name, &student.age, &student.score);
        students.push_back(student);
    }
    file.close();
    cout << "加载成功！" << endl;
}

int main() {
    vector<Student> students;
    loadFromFile(students);
    while (true) {
        cout << "请输入操作编号：1.添加学生 2.删除学生 3.修改成绩 4.查询学生 5.列出所有学生 6.保存到文件 7.从文件加载 0.退出" << endl;
        int option;
        cin >> option;
        switch (option) {
            case 1:
                addStudent(students);
                break;
            case 2:
                delStudent(students);
                break;
            case 3:
                modifyStudent(students);
                break;
            case 4:
                queryStudent(students);
                break;
            case 5:
                listStudent(students);
                break;
            case 6:
                saveToFile(students);
                break;
            case 7:
                loadFromFile(students);
                break;
            case 0:
                return 0;
            default:
                cout << "无效的操作编号！" << endl;
        }
    }
}

这个程序使用了一个`vector`来存储学生信息，支持添加、删除、修改、查询、列出和保存到文件等操作。在退出程序前，程序会将学生信息保存到本地文件`students.txt`中，下次启动程序时可以自动加载。