WAP to swap to numeric data using function.(Reference variable).

#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;
}