#include<iostream.h>
#include<stdio.h>
void invers(int & x, int & y)
{ int i; i=x; x=y; y=i;};
void main()
{
   int a,b;
	cout<<"a=";cin>>a;
   cout<<"b=";cin>>b;
   invers(a,b);
   cout<<a<<"\n";
   cout<<b<<"\n";
   getchar();
}