Swapping values without using third variable (C++)

Swapping values without using third variable

The following code shows you how two swap between two values without using third variable.

Code

#include "stdafx.h"

#include "iostream"

#include "conio.h"

using namespace std;

int main()

{

       int a;

       int b;

       cout<<"Enter A > ";

       cin>>a;

        

       cout<<"Enter B > ";

       cin>>b;

       a = a + b;

       b = a - b;

       a = a - b;

         

       cout<<"After Swapping A is > "<<a<<endl;

       cout<<"After Swapping B is > "<<b<<endl;

      

       _getche();

       return 0;

}

Output

Enter A > 12

Enter B > 21

After Swapping A is > 21

After Swapping B is > 12