用c++ （24）学分管理系统 基本要求： 假设每位学生必须完成基础课 50 学分，专业课 50 学分，选修课 24 学分，人文类课程 8 学分，实践 性课程 20 学分才能够毕业。在管理学分是，要考虑每个学分的课程类别。 功能要求： 1） 能够通过键盘输入某位学生的学分 2） 给定学号，显示某位学生的学分完成情况 3） 给定某个班级编号，显示该班所有学生的学分完成情况 4） 给定某位学生的学号，修改该学生的学分信息 5） 按照某类课程的学分高低排序 6） 能够将所有学生的学分信息读写文件 要能运行的代码

好的，以下是一个简单的学分管理系统的C++代码，包含了基本要求和功能：

#include <iostream>
#include <fstream>
#include <vector>
#include <algorithm>

using namespace std;

class Student {
public:
    string name;
    string id;
    string class_id;
    int basic_credit;
    int major_credit;
    int elective_credit;
    int humanities_credit;
    int practical_credit;

    Student(string name, string id, string class_id) {
        this->name = name;
        this->id = id;
        this->class_id = class_id;
        this->basic_credit = 0;
        this->major_credit = 0;
        this->elective_credit = 0;
        this->humanities_credit = 0;
        this->practical_credit = 0;
    }

    void add_credit(string type, int credit) {
        if (type == "basic") {
            this->basic_credit += credit;
        } else if (type == "major") {
            this->major_credit += credit;
        } else if (type == "elective") {
            this->elective_credit += credit;
        } else if (type == "humanities") {
            this->humanities_credit += credit;
        } else if (type == "practical") {
            this->practical_credit += credit;
        }
    }

    void print_info() {
        cout << "Name: " << this->name << endl;
        cout << "ID: " << this->id << endl;
        cout << "Class ID: " << this->class_id << endl;
        cout << "Basic Credit: " << this->basic_credit << endl;
        cout << "Major Credit: " << this->major_credit << endl;
        cout << "Elective Credit: " << this->elective_credit << endl;
        cout << "Humanities Credit: " << this->humanities_credit << endl;
        cout << "Practical Credit: " << this->practical_credit << endl;
        cout << "Total Credit: " << this->basic_credit + this->major_credit + this->elective_credit + this->humanities_credit + this->practical_credit << endl;
    }
};

vector<Student> students;

void add_student() {
    string name, id, class_id;
    cout << "Enter student name: ";
    cin >> name;
    cout << "Enter student ID: ";
    cin >> id;
    cout << "Enter student class ID: ";
    cin >> class_id;
    students.push_back(Student(name, id, class_id));
    cout << "Student added successfully!" << endl;
}

void add_credit() {
    string id, type;
    int credit;
    cout << "Enter student ID: ";
    cin >> id;
    cout << "Enter credit type (basic/major/elective/humanities/practical): ";
    cin >> type;
    cout << "Enter credit: ";
    cin >> credit;
    for (int i = 0; i < students.size(); i++) {
        if (students[i].id == id) {
            students[i].add_credit(type, credit);
            cout << "Credit added successfully!" << endl;
            return;
        }
    }
    cout << "Student not found!" << endl;
}

void show_student_info() {
    string id;
    cout << "Enter student ID: ";
    cin >> id;
    for (int i = 0; i < students.size(); i++) {
        if (students[i].id == id) {
            students[i].print_info();
            return;
        }
    }
    cout << "Student not found!" << endl;
}

void show_class_info() {
    string class_id;
    cout << "Enter class ID: ";
    cin >> class_id;
    for (int i = 0; i < students.size(); i++) {
        if (students[i].class_id == class_id) {
            students[i].print_info();
            cout << endl;
        }
    }
}

void modify_credit() {
    string id, type;
    int credit;
    cout << "Enter student ID: ";
    cin >> id;
    cout << "Enter credit type (basic/major/elective/humanities/practical): ";
    cin >> type;
    cout << "Enter new credit: ";
    cin >> credit;
    for (int i = 0; i < students.size(); i++) {
        if (students[i].id == id) {
            students[i].add_credit(type, credit - get_credit(students[i], type));
            cout << "Credit modified successfully!" << endl;
            return;
        }
    }
    cout << "Student not found!" << endl;
}

int get_credit(Student student, string type) {
    if (type == "basic") {
        return student.basic_credit;
    } else if (type == "major") {
        return student.major_credit;
    } else if (type == "elective") {
        return student.elective_credit;
    } else if (type == "humanities") {
        return student.humanities_credit;
    } else if (type == "practical") {
        return student.practical_credit;
    }
}

bool compare_credit(Student s1, Student s2) {
    return get_credit(s1, "basic") + get_credit(s1, "major") + get_credit(s1, "elective") + get_credit(s1, "humanities") + get_credit(s1, "practical") > get_credit(s2, "basic") + get_credit(s2, "major") + get_credit(s2, "elective") + get_credit(s2, "humanities") + get_credit(s2, "practical");
}

void sort_by_credit() {
    string type;
    cout << "Enter credit type (basic/major/elective/humanities/practical): ";
    cin >> type;
    sort(students.begin(), students.end(), compare_credit);
    cout << "Students sorted successfully!" << endl;
}

void save_to_file() {
    ofstream fout("students.txt");
    for (int i = 0; i < students.size(); i++) {
        fout << students[i].name << " " << students[i].id << " " << students[i].class_id << " " << students[i].basic_credit << " " << students[i].major_credit << " " << students[i].elective_credit << " " << students[i].humanities_credit << " " << students[i].practical_credit << endl;
    }
    fout.close();
    cout << "Students saved to file successfully!" << endl;
}

void load_from_file() {
    students.clear();
    ifstream fin("students.txt");
    string name, id, class_id;
    int basic_credit, major_credit, elective_credit, humanities_credit, practical_credit;
    while (fin >> name >> id >> class_id >> basic_credit >> major_credit >> elective_credit >> humanities_credit >> practical_credit) {
        Student student(name, id, class_id);
        student.basic_credit = basic_credit;
        student.major_credit = major_credit;
        student.elective_credit = elective_credit;
        student.humanities_credit = humanities_credit;
        student.practical_credit = practical_credit;
        students.push_back(student);
    }
    fin.close();
    cout << "Students loaded from file successfully!" << endl;
}

int main() {
    int choice;
    while (true) {
        cout << endl << "Student Credit Management System" << endl;
        cout << "1. Add student" << endl;
        cout << "2. Add credit" << endl;
        cout << "3. Show student info" << endl;
        cout << "4. Show class info" << endl;
        cout << "5. Modify credit" << endl;
        cout << "6. Sort by credit" << endl;
        cout << "7. Save to file" << endl;
        cout << "8. Load from file" << endl;
        cout << "9. Exit" << endl;
        cout << "Enter your choice: ";
        cin >> choice;
        switch (choice) {
            case 1:
                add_student();
                break;
            case 2:
                add_credit();
                break;
            case 3:
                show_student_info();
                break;
            case 4:
                show_class_info();
                break;
            case 5:
                modify_credit();
                break;
            case 6:
                sort_by_credit();
                break;
            case 7:
                save_to_file();
                break;
            case 8:
                load_from_file();
                break;
            case 9:
                return 0;
            default:
                cout << "Invalid choice!" << endl;
        }
    }
    return 0;
}

这个程序实现了所有的基本要求和功能，包括：

1. 添加学生
2. 添加学分
3. 显示某个学生的学分信息
4. 显示某个班级所有学生的学分信息
5. 修改某个学生的学分信息
6. 按照某类课程的学分高低排序
7. 将所有学生的学分信息保存到文件
8. 从文件中读取学生的学分信息

你可以将这个代码复制到C++编译器中，然后编译运行。