#include <iostream>
using namespace std ;

int main()
{
	int x1 = 5 ;
	int& ref1Var  = x1 ;
	cout << ref1Var << endl ;
	ref1Var++ ;
	cout <<x1 << " : " <<  ref1Var << endl ;
	x1++ ;
	cout <<x1 << " : " <<  ref1Var << endl ;
	//Every reference need to be initialized at the point of definition.
	//Compiler error
	//   int& refVar1 ;
	return(0)  ;

}