101Program_SwappingWithoutUsingThirdVariable.cpp

/**************************************************
 * Using Substraction and Addition
 * ************************************************/
#include<iostream>
using namespace std;                        
int main()
{
    int a,b;
    cout<<"Enter the first number: ";
    cin>>a;
    cout<<"Enter the second number: ";
    cin>>b;
    a = b-a;
    b = b -a;
    a = a + b;
    cout<<"After swapping, first number is "<<a<<" and second number is "<<b;
    return 0;
}