大一第二学期第8周【程序阅读（2）】

 

源代码：

                 

#include <iostream>using namespace std;class Sample{private:    int x;public:    Sample() {}    Sample (int a){x=a;}    void disp(){cout<<"x="<<x<<endl;}    Sample operator+(Sample &s);};Sample Sample:: operator+( Sample &s){    return Sample(x+s.x);}int main(){    Sample obj1(20);    Sample obj2(20);    Sample obj3;    obj3=obj1+obj2;    obj3.disp();    return 0;}

 

 

运行结果：