A C++ program that swaps data using reference variable.

SwapDataReferenceVariable.cpp

#include<iostream>
#include<conio.h>

using namespace std;

void swap(int &,int &);

int main()
{
 int a,b;
 cout<<"Enter first number : ";cin>>a;
 cout<<"Enter second number : ";cin>>b;
 swap(a,b);
 cout<<"After Swap !!!";
 cout<<"\nFirst number is "<<a;
 cout<<"\nSecond number is "<<b;
 getch();
 return(0);
}

void swap(int &x,int &y)
{
 int z=x;
 x=y;
 y=z;
}