Swapping Without Third Variable

C++ PROGRAMS

The previous program (Swapping) used a third variable t which helped in swapping. However swapping can also be done without a third variable. 

In this we use simple logic of addition and subtraction.

Code:

#include<iostream.h>

#include<conio.h>

void swap(int a,int b)

{

a=a+b;

b=a-b;

a=a-b;

cout<<a<<" "<<b;

}

void main()

{

int a,b;

cin>>a>>b;

swap(a,b);

getch();

}

Output:

First Run:

Second Run:

For any queries or suggestions please comment !