重载<<和>>

                                                重载运算符

#include<iostream.h>

//using namespace std;

class point{

public:int x,y;

public:

 point()  {x=0;y=0;}

 point(int xx,int yy)  {x=xx;y=yy;}

 friend ostream &operator<<(ostream &output,point obj);

 friend istream &operator>>(istream &input,point &obj);

};

 

ostream &operator<<(ostream &output,point obj) {

output<<"x="<<obj.x<<" "<<"y="<<obj.y<<endl;

return output;

}

istream &operator>>(istream &input,point &obj) {

cout<<"请输入x、y的值"<<endl;

input>>obj.x>>obj.y;

return input;

}

 

int main() {

point p(10,20);

cout<<p;

cin>>p;

cout<<p;

return 0;

}