高校学生信息包括：学号、姓名、性别、年龄、系别、班级、联系方式等信息。 课程信息包括：课程代码、课程名称、课程性质、总学时、学分、开课学期、选修人数等信息。学生可对课程信息进行查询，选修符合要求的课程。 根据课程信息和学生信息完成对课程的选修，需要专门的一个管理类来完成选修工作。 2）功能要求 （1）添加功能：程序能够任意添加课程和学生记录，可提供选择界面供用户选择所要添加的类别，要求编号要唯一，如果添加了重复编号的记录时，则提示数据添加重复并取消添加。 （2）查询功能：可根据编号、姓名等信息对已添加的学生和课程记录进行查询，如果未找到，给出相应的提示信息，如果找到，则显示相应的记录信息。 （3）显示功能：可显示当前系统中所有学生和课程的记录，每条记录占据一行。 （4）编辑功能：可根据查询结果对相应的记录进行修改，修改时注意编号的唯一性。 （5）删除功能：主要实现对已添加的学生和课程记录进行删除。如果当前系统中没有相应的记录，则提示“记录为空！”并返回操作。写一段c++代码

以下是简单实现上述功能的C++代码：

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

using namespace std;

class Student {
public:
    string id;
    string name;
    string gender;
    int age;
    string department;
    string clazz;
    string phone;

    Student(string id, string name, string gender, int age, string department, string clazz, string phone) {
        this->id = id;
        this->name = name;
        this->gender = gender;
        this->age = age;
        this->department = department;
        this->clazz = clazz;
        this->phone = phone;
    }

    void print() {
        cout << id << "\t" << name << "\t" << gender << "\t" << age << "\t";
        cout << department << "\t" << clazz << "\t" << phone << endl;
    }
};

class Course {
public:
    string code;
    string name;
    string type;
    int total_hours;
    int credit;
    string semester;
    int num_of_students;

    Course(string code, string name, string type, int total_hours, int credit, string semester, int num_of_students) {
        this->code = code;
        this->name = name;
        this->type = type;
        this->total_hours = total_hours;
        this->credit = credit;
        this->semester = semester;
        this->num_of_students = num_of_students;
    }

    void print() {
        cout << code << "\t" << name << "\t" << type << "\t" << total_hours << "\t";
        cout << credit << "\t" << semester << "\t" << num_of_students << endl;
    }
};

class ManagementSystem {
public:
    vector<Student> students;
    vector<Course> courses;

    void addStudent() {
        string id, name, gender, department, clazz, phone;
        int age;
        cout << "Enter student id: ";
        cin >> id;
        cout << "Enter student name: ";
        cin >> name;
        cout << "Enter student gender: ";
        cin >> gender;
        cout << "Enter student age: ";
        cin >> age;
        cout << "Enter student department: ";
        cin >> department;
        cout << "Enter student class: ";
        cin >> clazz;
        cout << "Enter student phone: ";
        cin >> phone;
        Student student(id, name, gender, age, department, clazz, phone);
        students.push_back(student);
        cout << "Student added successfully!" << endl;
    }

    void addCourse() {
        string code, name, type, semester;
        int total_hours, credit, num_of_students;
        cout << "Enter course code: ";
        cin >> code;
        cout << "Enter course name: ";
        cin >> name;
        cout << "Enter course type: ";
        cin >> type;
        cout << "Enter total hours: ";
        cin >> total_hours;
        cout << "Enter credit: ";
        cin >> credit;
        cout << "Enter semester: ";
        cin >> semester;
        cout << "Enter number of students: ";
        cin >> num_of_students;
        Course course(code, name, type, total_hours, credit, semester, num_of_students);
        courses.push_back(course);
        cout << "Course added successfully!" << endl;
    }

    void listStudents() {
        if (students.empty()) {
            cout << "No students found!" << endl;
        } else {
            cout << "id\tname\tgender\tage\tdepartment\tclass\tphone" << endl;
            for (auto student : students) {
                student.print();
            }
        }
    }

    void listCourses() {
        if (courses.empty()) {
            cout << "No courses found!" << endl;
        } else {
            cout << "code\tname\ttype\ttotal hours\tcredit\tsemester\tnumber of students" << endl;
            for (auto course : courses) {
                course.print();
            }
        }
    }

    void searchStudent() {
        string keyword;
        cout << "Enter student id or name: ";
        cin >> keyword;
        bool found = false;
        for (auto student : students) {
            if (student.id == keyword || student.name == keyword) {
                student.print();
                found = true;
            }
        }
        if (!found) {
            cout << "No student found!" << endl;
        }
    }

    void searchCourse() {
        string keyword;
        cout << "Enter course code or name: ";
        cin >> keyword;
        bool found = false;
        for (auto course : courses) {
            if (course.code == keyword || course.name == keyword) {
                course.print();
                found = true;
            }
        }
        if (!found) {
            cout << "No course found!" << endl;
        }
    }

    void editStudent() {
        string id;
        cout << "Enter student id: ";
        cin >> id;
        bool found = false;
        for (int i = 0; i < students.size(); i++) {
            if (students[i].id == id) {
                string name, gender, department, clazz, phone;
                int age;
                cout << "Enter student name: ";
                cin >> name;
                cout << "Enter student gender: ";
                cin >> gender;
                cout << "Enter student age: ";
                cin >> age;
                cout << "Enter student department: ";
                cin >> department;
                cout << "Enter student class: ";
                cin >> clazz;
                cout << "Enter student phone: ";
                cin >> phone;
                students[i] = Student(id, name, gender, age, department, clazz, phone);
                cout << "Student updated successfully!" << endl;
                found = true;
                break;
            }
        }
        if (!found) {
            cout << "No student found!" << endl;
        }
    }

    void editCourse() {
        string code;
        cout << "Enter course code: ";
        cin >> code;
        bool found = false;
        for (int i = 0; i < courses.size(); i++) {
            if (courses[i].code == code) {
                string name, type, semester;
                int total_hours, credit, num_of_students;
                cout << "Enter course name: ";
                cin >> name;
                cout << "Enter course type: ";
                cin >> type;
                cout << "Enter total hours: ";
                cin >> total_hours;
                cout << "Enter credit: ";
                cin >> credit;
                cout << "Enter semester: ";
                cin >> semester;
                cout << "Enter number of students: ";
                cin >> num_of_students;
                courses[i] = Course(code, name, type, total_hours, credit, semester, num_of_students);
                cout << "Course updated successfully!" << endl;
                found = true;
                break;
            }
        }
        if (!found) {
            cout << "No course found!" << endl;
        }
    }

    void removeStudent() {
        string id;
        cout << "Enter student id: ";
        cin >> id;
        bool found = false;
        for (int i = 0; i < students.size(); i++) {
            if (students[i].id == id) {
                students.erase(students.begin() + i);
                cout << "Student removed successfully!" << endl;
                found = true;
                break;
            }
        }
        if (!found) {
            cout << "No student found!" << endl;
        }
    }

    void removeCourse() {
        string code;
        cout << "Enter course code: ";
        cin >> code;
        bool found = false;
        for (int i = 0; i < courses.size(); i++) {
            if (courses[i].code == code) {
                courses.erase(courses.begin() + i);
                cout << "Course removed successfully!" << endl;
                found = true;
                break;
            }
        }
        if (!found) {
            cout << "No course found!" << endl;
        }
    }
};

int main() {
    ManagementSystem ms;
    while (true) {
        cout << "1. Add student" << endl;
        cout << "2. Add course" << endl;
        cout << "3. List students" << endl;
        cout << "4. List courses" << endl;
        cout << "5. Search student" << endl;
        cout << "6. Search course" << endl;
        cout << "7. Edit student" << endl;
        cout << "8. Edit course" << endl;
        cout << "9. Remove student" << endl;
        cout << "10. Remove course" << endl;
        cout << "11. Exit" << endl;
        int choice;
        cout << "Enter your choice: ";
        cin >> choice;
        switch (choice) {
            case 1:
                ms.addStudent();
                break;
            case 2:
                ms.addCourse();
                break;
            case 3:
                ms.listStudents();
                break;
            case 4:
                ms.listCourses();
                break;
            case 5:
                ms.searchStudent();
                break;
            case 6:
                ms.searchCourse();
                break;
            case 7:
                ms.editStudent();
                break;
            case 8:
                ms.editCourse();
                break;
            case 9:
                ms.removeStudent();
                break;
            case 10:
                ms.removeCourse();
                break;
            case 11:
                return 0;
            default:
                cout << "Invalid choice!" << endl;
                break;
        }
    }
    return 0;
}

注意：本代码仅为演示目的，实际情况下应当进行更严谨的输入检查和异常处理。