第8次（友元函数、友元类）.zip

#include<iostream> #include<string> using namespace std; class Teacher { private: string name; string subject; public: Teacher(string name, string subject) :name(name), subject(subject) {} void display() { //实现display函数 cout << "Name: " << name << " Subject: " << subject << endl; } //定义Student类是Teacher类的友元类 friend class Student; }; class Student { private: string name; int score; Teacher* teacher; public: Student(string name, Teacher* teacher, int score) :name(name), teacher(teacher), score(score) {} void display() { //实现display函数 cout << "Name: " << name << " Teacher's name: " << teacher->name << " Teacher's subject: " << teacher->subject << " Score: " << score << endl; } }; int main() { Teacher t1("DJ Yang", "CPP"), t2("Simin Zhang", "Java"); Student s1("Tom", &t1, 80), s2("Jerry", &t2, 90), s3("Garfield", &t2, 100); t1.display(); t2.display(); s1.display(); s2.display(); s3.display(); return 0; } //Name: DJ Yang Subject : CPP //Name: Simin Zhang Subject : Java //Name: Tom Teacher's name: DJ Yang Teacher's subject : CPP Score : 80 //Name: Jerry Teacher's name: Simin Zhang Teacher's subject : Java Score : 90 //Name: Garfield Teacher's name: Simin Zhang Teacher's subject : Java Score : 100