给出下面程序的输出结果

#include<iostream>

using namespace std;

class Simple

{

int x,y;

public:

Simple(){x=y=0;}

Simple(int i,int j){x=i;y=j;}

void copy(Simple&s);

void setxy(int i,int j){x=i;y=j;}

void print(){cout<<"x="<<x<<",y="<<y<<endl;}

};

void Simple::copy(Simple&s)

{

x=s.x;y=s.y;

}

void func(Simple s1,Simple&s2)

{

s1.setxy(30,40);

s2.setxy(70,80);

}

void main()

{

Simple obj1(1,2),obj2;

obj2.copy(obj1);

func(obj1,obj2);

obj1.print();

obj2.print();

}

---