生产一个学生选课管理系统代码

好的，以下是一个简单的基于C++的学生选课管理系统代码示例。

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

using namespace std;

class Course {
private:
    string name;
    string id;
    int capacity;
    int enrolled;

public:
    Course(string name, string id, int capacity) {
        this->name = name;
        this->id = id;
        this->capacity = capacity;
        this->enrolled = 0;
    }

    string get_name() {
        return this->name;
    }

    string get_id() {
        return this->id;
    }

    int get_capacity() {
        return this->capacity;
    }

    int get_enrolled() {
        return this->enrolled;
    }

    bool add_student() {
        if (this->enrolled < this->capacity) {
            this->enrolled++;
            return true;
        } else {
            return false;
        }
    }
};

class Student {
private:
    string name;
    string id;
    vector<Course*> courses;

public:
    Student(string name, string id) {
        this->name = name;
        this->id = id;
    }

    string get_name() {
        return this->name;
    }

    string get_id() {
        return this->id;
    }

    void enroll(Course* course) {
        if (course->add_student()) {
            this->courses.push_back(course);
            cout << "Enrolled " << course->get_name() << endl;
        } else {
            cout << "Course is full: " << course->get_name() << endl;
        }
    }

    void drop(Course* course) {
        bool found = false;
        for (int i = 0; i < this->courses.size(); i++) {
            if (this->courses[i]->get_id() == course->get_id()) {
                this->courses.erase(this->courses.begin() + i);
                course->drop_student();
                cout << "Dropped " << course->get_name() << endl;
                found = true;
                break;
            }
        }
        if (!found) {
            cout << "Course not found: " << course->get_name() << endl;
        }
    }

    void list_courses() {
        cout << "Courses for " << this->name << ":" << endl;
        for (int i = 0; i < this->courses.size(); i++) {
            cout << "- " << this->courses[i]->get_name() << endl;
        }
    }
};

class CourseManager {
private:
    vector<Course*> courses;

public:
    void add_course() {
        string name, id;
        int capacity;
        cout << "Enter course name: ";
        cin >> name;
        cout << "Enter course ID: ";
        cin >> id;
        cout << "Enter course capacity: ";
        cin >> capacity;
        courses.push_back(new Course(name, id, capacity));
    }

    void remove_course() {
        string id;
        cout << "Enter course ID: ";
        cin >> id;
        bool found = false;
        for (int i = 0; i < courses.size(); i++) {
            if (courses[i]->get_id() == id) {
                courses.erase(courses.begin() + i);
                found = true;
                cout << "Course removed." << endl;
                break;
            }
        }
        if (!found) {
            cout << "Course not found." << endl;
        }
    }

    void list_courses() {
        cout << "Course list:" << endl;
        for (int i = 0; i < courses.size(); i++) {
            Course* course = courses[i];
            cout << "- " << course->get_name() << " (ID: " << course->get_id() << ") Capacity: " << course->get_capacity() << " Enrolled: " << course->get_enrolled() << endl;
        }
    }

    Course* find_course(string id) {
        for (int i = 0; i < courses.size(); i++) {
            if (courses[i]->get_id() == id) {
                return courses[i];
            }
        }
        return NULL;
    }
};

class StudentManager {
private:
    vector<Student*> students;

public:
    void add_student() {
        string name, id;
        cout << "Enter student name: ";
        cin >> name;
        cout << "Enter student ID: ";
        cin >> id;

        students.push_back(new Student(name, id));
    }

    void remove_student() {
        string id;
        cout << "Enter student ID: ";
        cin >> id;
        bool found = false;
        for (int i = 0; i < students.size(); i++) {
            if (students[i]->get_id() == id) {
                students.erase(students.begin() + i);
                found = true;
                cout << "Student removed." << endl;
                break;
            }
        }
        if (!found) {
            cout << "Student not found." << endl;
        }
    }

    void list_students() {
        cout << "Student list:" << endl;
        for (int i = 0; i < students.size(); i++) {
            Student* student = students[i];
            cout << "- " << student->get_name() << " (ID: " << student->get_id() << ")" << endl;
            student->list_courses();
        }
    }

    Student* find_student(string id) {
        for (int i = 0; i < students.size(); i++) {
            if (students[i]->get_id() == id) {
                return students[i];
            }
        }
        return NULL;
    }
};

int main() {
    int choice;
    CourseManager courseManager;
    StudentManager studentManager;

    while (true) {
        cout << "Select an option:" << endl;
        cout << "1. Add course" << endl;
        cout << "2. Remove course" << endl;
        cout << "3. List courses" << endl;
        cout << "4. Add student" << endl;
        cout << "5. Remove student" << endl;
        cout << "6. List students" << endl;
        cout << "7. Enroll student" << endl;
        cout << "8. Drop student" << endl;
        cout << "0. Exit" << endl;
        cin >> choice;

        switch (choice) {
            case 1:
                courseManager.add_course();
                break;
            case 2:
                courseManager.remove_course();
                break;
            case 3:
                courseManager.list_courses();
                break;
            case 4:
                studentManager.add_student();
                break;
            case 5:
                studentManager.remove_student();
                break;
            case 6:
                studentManager.list_students();
                break;
            case 7: {
                string studentId, courseId;
                cout << "Enter student ID: ";
                cin >> studentId;
                Student* student = studentManager.find_student(studentId);
                if (student == NULL) {
                    cout << "Student not found." << endl;
                    break;
                }
                cout << "Enter course ID: ";
                cin >> courseId;
                Course* course = courseManager.find_course(courseId);
                if (course == NULL) {
                    cout << "Course not found." << endl;
                    break;
                }
                student->enroll(course);
                break;
            }
            case 8: {
                string studentId, courseId;
                cout << "Enter student ID: ";
                cin >> studentId;
                Student* student = studentManager.find_student(studentId);
                if (student == NULL) {
                    cout << "Student not found." << endl;
                    break;
                }
                cout << "Enter course ID: ";
                cin >> courseId;
                Course* course = courseManager.find_course(courseId);
                if (course == NULL) {
                    cout << "Course not found." << endl;
                    break;
                }
                student->drop(course);
                break;
            }
            case 0:
                return 0;
            default:
                cout << "Invalid option." << endl;
                break;
        }
    }

    return 0;
}

该系统包括两个管理类：`CourseManager`和`StudentManager`，以及两个实体类：`Course`和`Student`。每个类都有一些方法，以实现相应的功能。

在主函数中，我们创建了`CourseManager`和`StudentManager`对象，并使用一个无限循环来等待用户输入选项。用户可以选择添加、删除、列出课程或学生，或者将学生注册到课程中，或将学生退课。系统会根据用户的选择调用相应的方法。

这只是一个简单的示例，实际的学生选课管理系统需要更多的功能和错误处理。但是，这应该可以帮助你开始编写自己的程序。