请写一个可以添加、显示、查找、删除、保存、导出学生成绩记录的学生成绩管理系统c++

好的，我可以为你提供一个简单的学生成绩管理系统的C++代码，包含添加、显示、查找、删除、保存、导出学生成绩记录等功能。以下是代码实现：

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

using namespace std;

// 学生类
class Student {
public:
    string name; // 姓名
    string id; // 学号
    double score; // 成绩

    Student(string name = "", string id = "", double score = 0.0) {
        this->name = name;
        this->id = id;
        this->score = score;
    }
};

// 学生成绩管理类
class GradeManager {
private:
    vector<Student> students; // 学生记录

    // 内部函数：查找学生索引位置
    int findIndex(string id) {
        for (int i = 0; i < students.size(); i++) {
            if (students[i].id == id) {
                return i;
            }
        }
        return -1;
    }

public:
    // 添加学生记录
    void addStudent(Student student) {
        students.push_back(student);
    }

    // 显示所有学生记录
    void showAllStudents() {
        cout << "姓名\t学号\t成绩" << endl;
        for (int i = 0; i < students.size(); i++) {
            cout << students[i].name << "\t" << students[i].id << "\t" << fixed << setprecision(2) << students[i].score << endl;
        }
    }

    // 查找学生记录
    void searchStudent(string id) {
        int index = findIndex(id);
        if (index >= 0) {
            cout << "找到学生：" << students[index].name << "\t" << students[index].id << "\t" << fixed << setprecision(2) << students[index].score << endl;
        } else {
            cout << "未找到该学生" << endl;
        }
    }

    // 删除学生记录
    void deleteStudent(string id) {
        int index = findIndex(id);
        if (index >= 0) {
            students.erase(students.begin() + index);
            cout << "删除成功" << endl;
        } else {
            cout << "未找到该学生" << endl;
        }
    }

    // 保存学生成绩记录到文件
    void saveToFile(string filename) {
        ofstream outfile(filename);
        if (outfile.is_open()) {
            for (int i = 0; i < students.size(); i++) {
                outfile << students[i].name << "\t" << students[i].id << "\t" << fixed << setprecision(2) << students[i].score << endl;
            }
            outfile.close();
            cout << "保存成功" << endl;
        } else {
            cout << "保存失败" << endl;
        }
    }

    // 从文件中导入学生成绩记录
    void loadFromFile(string filename) {
        ifstream infile(filename);
        if (infile.is_open()) {
            students.clear();
            string line;
            while (getline(infile, line)) {
                string name, id;
                double score;
                sscanf(line.c_str(), "%s%s%lf", &name, &id, &score);
                Student student(name, id, score);
                students.push_back(student);
            }
            infile.close();
            cout << "导入成功" << endl;
        } else {
            cout << "导入失败" << endl;
        }
    }

    // 导出学生成绩记录到文件
    void exportToFile(string filename) {
        ofstream outfile(filename);
        if (outfile.is_open()) {
            outfile << "姓名\t学号\t成绩" << endl;
            for (int i = 0; i < students.size(); i++) {
                outfile << students[i].name << "\t" << students[i].id << "\t" << fixed << setprecision(2) << students[i].score << endl;
            }
            outfile.close();
            cout << "导出成功" << endl;
        } else {
            cout << "导出失败" << endl;
        }
    }
};

// 主函数
int main() {
    GradeManager manager;

    while (true) {
        cout << "请输入操作序号：" << endl;
        cout << "1. 添加学生记录" << endl;
        cout << "2. 显示所有学生记录" << endl;
        cout << "3. 查找学生记录" << endl;
        cout << "4. 删除学生记录" << endl;
        cout << "5. 保存学生成绩记录到文件" << endl;
        cout << "6. 从文件中导入学生成绩记录" << endl;
        cout << "7. 导出学生成绩记录到文件" << endl;
        cout << "0. 退出程序" << endl;

        int choice;
        cin >> choice;

        if (choice == 1) {
            cout << "请输入学生姓名、学号、成绩：" << endl;
            string name, id;
            double score;
            cin >> name >> id >> score;
            Student student(name, id, score);
            manager.addStudent(student);
            cout << "添加成功" << endl;
        } else if (choice == 2) {
            manager.showAllStudents();
        } else if (choice == 3) {
            cout << "请输入要查找的学生学号：" << endl;
            string id;
            cin >> id;
            manager.searchStudent(id);
        } else if (choice == 4) {
            cout << "请输入要删除的学生学号：" << endl;
            string id;
            cin >> id;
            manager.deleteStudent(id);
        } else if (choice == 5) {
            cout << "请输入要保存学生成绩记录的文件名：" << endl;
            string filename;
            cin >> filename;
            manager.saveToFile(filename);
        } else if (choice == 6) {
            cout << "请输入要导入学生成绩记录的文件名：" << endl;
            string filename;
            cin >> filename;
            manager.loadFromFile(filename);
        } else if (choice == 7) {
            cout << "请输入要导出学生成绩记录的文件名：" << endl;
            string filename;
            cin >> filename;
            manager.exportToFile(filename);
        } else if (choice == 0) {
            break;
        } else {
            cout << "输入错误，请重新输入" << endl;
        }
    }

    return 0;
}

这是一个简单的学生成绩管理系统，其中包含了添加、显示、查找、删除、保存、导出学生成绩记录等功能。你可以根据自己的需求进行修改和完善。