#include<iostream.h>
void change(int i,int j);
void main()
{
    int x=5;
    int y=3;
    cout<<"original x="<<x<<endl;
    cout<<"original y="<<y<<endl;
    change(x,y);
    cout<<"change x="<<x<<endl;
    cout<<"change y="<<y<<endl;
    while(1);
}
void change(int i,int j)
{
    i=i+j;
    j=i-j;
    i=i-j;
}