#include <stdio.h> #include <iostream> using namespacestd; //友元函数 class Girl{ public: friendvoid changeAge(Girl *girl,int age);//友元函数 friendclass Boy;//友元类 int tell(); private: int age; }; int Girl::tell(){ cout<<"age:"<<age<<endl; return0; } void changeAge(Girl *girl,int age){ girl->age = age; } //友元类 class Boy{ public: Boy(Girl girl){ this->girl = girl; } void introduce(){ cout<<"介绍girl年龄: "<<girl.age<<endl; } void changeGirl(){ girl.age =28; } private: Girl girl; }; int main(){ /* Girl * girl = new Girl(); girl->tell(); changeAge(girl, 16); girl->tell(); delete girl; return 0;*/ Girl girl; Boy boy =Boy(girl); boy.introduce(); boy.changeGirl(); boy.introduce(); return0; }
C++ 友元函数 友元类
最新推荐文章于 2025-05-11 16:13:22 发布