设计一个成绩管理系统

Question

要求基础简单一点的，不要太难，谢谢。
(凑字数不用管只看图片)
(●♡∀♡)(◕ᴗ◕✿)((づ￣ ³￣)づ(´ω｀)

Answer 1

引自强大而免费的微信小程序：皆我知道。

以下是一个简单的C++学生成绩系统的实现，并提供了一个符合题设要求的students.txt文件内容：

#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <algorithm>
using namespace std;

struct Student {
    string name;
    int score;
};

vector<Student> students;

void addStudent() {
    Student newStudent;
    cout << "请输入学生姓名：";
    cin >> newStudent.name;
    cout << "请输入学生成绩：";
    cin >> newStudent.score;
    students.push_back(newStudent);
    cout << "学生信息添加成功！" << endl;
}

void displayStudents() {
    cout << "学生信息如下：" << endl;
    for (int i = 0; i < students.size(); i++) {
        cout << "姓名：" << students[i].name << "  成绩：" << students[i].score << endl;
    }
}

bool compare(const Student& s1, const Student& s2)
{
    return s1.score > s2.score;
}

void sortStudents() {
    sort(students.begin(), students.end(), compare);
    cout << "学生成绩排序成功！" << endl;
}


void deleteStudent() {
    string name;
    cout << "请输入要删除学生的姓名：";
    cin >> name;
    for (int i = 0; i < students.size(); i++) {
        if (students[i].name == name) {
            students.erase(students.begin() + i);
            cout << "学生信息删除成功！" << endl;
            return;
        }
    }
    cout << "未找到该学生信息！" << endl;
}

void modifyStudent() {
    string name;
    cout << "请输入要修改学生的姓名：";
    cin >> name;
    for (int i = 0; i < students.size(); i++) {
        if (students[i].name == name) {
            cout << "请输入修改后的成绩：";
            cin >> students[i].score;
            cout << "学生信息修改成功！" << endl;
            return;
        }
    }
    cout << "未找到该学生信息！" << endl;
}

void searchStudent() {
    string name;
    cout << "请输入要查询学生的姓名：";
    cin >> name;
    for (int i = 0; i < students.size(); i++) {
        if (students[i].name == name) {
            cout << "姓名：" << students[i].name << "  成绩：" << students[i].score << endl;
            return;
        }
    }
    cout << "未找到该学生信息！" << endl;
}

void readFromFile() {
    ifstream inputFile("students.txt");
    if (!inputFile.good()) {
        cout << "文件打开失败！" << endl;
        return;
    }
    students.clear();
    string name;
    int score;
    while (inputFile >> name >> score) {
        Student student;
        student.name = name;
        student.score = score;
        students.push_back(student);
    }
    cout << "学生信息从文件中读取成功！" << endl;
    inputFile.close();
}

void deleteFile() {
    if (remove("students.txt") == 0) {
        cout << "学生信息文件删除成功！" << endl;
    }
    else {
        cout << "学生信息文件删除失败！" << endl;
    }
}

void saveToFile() {
    ofstream outputFile("students.txt");
    if (!outputFile.good()) {
        cout << "文件打开失败！" << endl;
        return;
    }
    for (int i = 0; i < students.size(); i++) {
        outputFile << students[i].name << " " << students[i].score << endl;
    }
    cout << "学生信息保存成功！" << endl;
    outputFile.close();
}

int main() {
    int option;
    while (true) {
        cout << "---------- 成绩管理系统 ----------" << endl;
        cout << "1. 录入学生成绩" << endl;
        cout << "2. 显示学生成绩" << endl;
        cout << "3. 成绩排列信息" << endl;
        cout << "4. 添加学生成绩" << endl;
        cout << "5. 删除学生成绩" << endl;
        cout << "6. 修改学生成绩" << endl;
        cout << "7. 查询学生成绩" << endl;
        cout << "8. 从文件读入学生成绩" << endl;
        cout << "9. 删除文件中学生信息" << endl;
        cout << "10. 保存学生信息" << endl;
        cout << "11. 退出" << endl;
        cout << "请输入操作选项（1-11）：";
        cin >> option;

        switch (option) {
            case 1:
                addStudent();
                break;
            case 2:
                displayStudents();
                break;
            case 3:
                sortStudents();
                break;
            case 4:
                addStudent();
                break;
            case 5:
                deleteStudent();
                break;
            case 6:
                modifyStudent();
                break;
            case 7:
                searchStudent();
                break;
            case 8:
                readFromFile();
                break;
            case 9:
                deleteFile();
                break;
            case 10:
                saveToFile();
                break;
            case 11:
                cout << "感谢使用成绩管理系统！" << endl;
                return 0;
            default:
                cout << "无效的选项！" << endl;
                break;
        }
        cout << endl;
    }

    return 0;
}

students.txt文件内容：

Lilei 90
Tom 85
Lucy 92

注意：这只是一个简单的实现示例，并没有考虑输入数据的格式验证等方面。在实际使用中，需要根据具体需求进行完善。