简单的学生成绩管理c++

以下是一个简单的学生成绩管理系统的 C++ 代码示例，包括学生信息、课程信息和成绩信息的录入、查询和统计：

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

struct Student {
    int id;
    string name;
    string gender;
    string phone;
    string address;
};

struct Course {
    int id;
    string name;
    int credit;
    string teacher;
};

struct Score {
    int student_id;
    int course_id;
    int score;
};

vector<Student> students;
vector<Course> courses;
vector<Score> scores;

void add_student() {
    Student student;
    cout << "请输入学生信息：" << endl;
    cout << "学号：";
    cin >> student.id;
    cout << "姓名：";
    cin >> student.name;
    cout << "性别：";
    cin >> student.gender;
    cout << "电话：";
    cin >> student.phone;
    cout << "地址：";
    cin >> student.address;
    students.push_back(student);
    cout << "添加成功！" << endl;
}

void add_course() {
    Course course;
    cout << "请输入课程信息：" << endl;
    cout << "课程编号：";
    cin >> course.id;
    cout << "课程名称：";
    cin >> course.name;
    cout << "学分：";
    cin >> course.credit;
    cout << "任课教师：";
    cin >> course.teacher;
    courses.push_back(course);
    cout << "添加成功！" << endl;
}

void add_score() {
    Score score;
    cout << "请输入成绩信息：" << endl;
    cout << "学号：";
    cin >> score.student_id;
    cout << "课程编号：";
    cin >> score.course_id;
    cout << "成绩：";
    cin >> score.score;
    scores.push_back(score);
    cout << "添加成功！" << endl;
}

void show_students() {
    cout << "学号\t姓名\t性别\t电话\t地址" << endl;
    for (auto it = students.begin(); it != students.end(); it++) {
        cout << it->id << "\t" << it->name << "\t" << it->gender << "\t" << it->phone << "\t" << it->address << endl;
    }
}

void show_courses() {
    cout << "课程编号\t课程名称\t学分\t任课教师" << endl;
    for (auto it = courses.begin(); it != courses.end(); it++) {
        cout << it->id << "\t" << it->name << "\t" << it->credit << "\t" << it->teacher << endl;
    }
}

void show_scores() {
    cout << "学号\t课程编号\t成绩" << endl;
    for (auto it = scores.begin(); it != scores.end(); it++) {
        cout << it->student_id << "\t" << it->course_id << "\t" << it->score << endl;
    }
}

void show_score_statistics() {
    int course_id;
    cout << "请输入课程编号：";
    cin >> course_id;
    int total_score = 0;
    int count = 0;
    for (auto it = scores.begin(); it != scores.end(); it++) {
        if (it->course_id == course_id) {
            total_score += it->score;
            count++;
        }
    }
    if (count > 0) {
        float average_score = (float)total_score / count;
        cout << "课程平均成绩：" << average_score << endl;
    } else {
        cout << "没有该课程的成绩信息！" << endl;
    }
}

int main() {
    int choice;
    while (true) {
        cout << "请选择操作：" << endl;
        cout << "1. 添加学生" << endl;
        cout << "2. 添加课程" << endl;
        cout << "3. 添加成绩" << endl;
        cout << "4. 查看学生列表" << endl;
        cout << "5. 查看课程列表" << endl;
        cout << "6. 查看成绩列表" << endl;
        cout << "7. 查看课程平均成绩" << endl;
        cout << "8. 退出程序" << endl;
        cout << "请输入操作编号：";
        cin >> choice;
        switch (choice) {
            case 1:
                add_student();
                break;
            case 2:
                add_course();
                break;
            case 3:
                add_score();
                break;
            case 4:
                show_students();
                break;
            case 5:
                show_courses();
                break;
            case 6:
                show_scores();
                break;
            case 7:
                show_score_statistics();
                break;
            case 8:
                return 0;
            default:
                cout << "无效操作！" << endl;
                break;
        }
    }
    return 0;
}

以上代码中包含了学生、课程和成绩信息的结构体定义，以及添加、查看和统计成绩的函数实现。在主函数中使用一个循环来实现用户选择操作的功能，用户可以根据需要选择添加学生、添加课程、添加成绩、查看学生列表、查看课程列表、查看成绩列表、查看课程平均成绩或退出程序。