C++多重继承

#include <iostream>
#include <string>
class Person
{
public:
    Person(std::string theName);
    void introduce();
protected:
    std::string name;
};

class Teacher:public Person
{
public:
    Teacher(std::string theName, std::string theClasses);
    void introduce();
    void teach();
protected:
    std::string classes;
};

class Student:public Person
{
public:
    Student(std::string theName, std::string theClasses);
    void introduce();
    void attendClass();
protected:
    std::string classes;
};

class TeachingStudent:public Teacher, public Student
{
public:
    TeachingStudent(std::string theName, std::string classTeaching, std::string classAttending);
    void introduce();
};

Person::Person(std::string theName)
{
    name = theName;
}
void Person::introduce()
{
    std::cout << "大家好，我是："<< name << "\n\n";
}

Teacher::Teacher(std::string theName, std::string theClasses):Person(theName)
{
    classes = theClasses;
}

void Teacher::teach()
{
    std::cout << name << "教" << classes << "\n\n";
}
void Teacher::introduce()
{
    std::cout << "大家好，我是" << name << ",我教" << classes << "\n\n";
}

Student::Student(std::string theName, std::string theClasses):Person(theName)
{
    classes = theClasses;
}
void Student::attendClass()
{
    std::cout << name << "加入" << classes << "学习\n\n";
}
void Student::introduce()
{
    std::cout << "大家好，我是"<< name << "，我在" << classes << "学习\n\n";
}

TeachingStudent::TeachingStudent(std::string theName,std::string classTeaching, std::string classAttending)
:Teacher(theName,classTeaching), Student(theName, classAttending)
{
}
void TeachingStudent::introduce()
{
    std::cout <<"大家好，我是"<< Student::name << ",我教" <<Teacher::classes << "\n";
    std::cout <<"同时我在"<< Student::classes << "学习\n\n";
}
int main()
{
    Teacher teacher("小甲鱼","C++入门");
    Student student("云上天空","C++入门");
    TeachingStudent teachingStudent("丁丁","C++入门","C++进阶");


    teacher.introduce();
    teacher.teach();

    student.introduce();
    student.attendClass();

    teachingStudent.introduce();
    teachingStudent.teach();
    teachingStudent.attendClass();

    return 0;
}