SWAPPING TWO NUMBERS IN C++ ( METHOD 3 )

#include <iostream>
using namespace std;

int main ()
{
    int a,b;

//IF YOU WANT YOU ARE NOT TAKING INPUT FROM USER SO YOU DICLARE VARIABLE LIKE int a=25;


    cout<<"PLEASE ENTER A NUMBER : ";
    cin>>a; //FOR TAKING INPUT FROM USER


    cout<<"PLEASE ENTER ANOTHER NUMBER : ";
    cin>>b; //FOR TAKING INPUT FROM USER


    cout<<"BEFORE SWAPPING THE NUMBERS ARE : "<<a<<" & "<<b<<endl;

    //SWAPPING

    a=a+b;
    b=a-b;
    a=a-b;

    cout<<"AFTER SWAPPING THE NUMBERS ARE : "<<a<<" & "<<b<<endl;

    return 0;
}

OUTPUT