Swap two numbers using bit-wise operators in C

We can write solution for this problem in two way i.e.

1. Call by reference
2. Call by value

Here is the C program using method 1 i.e. call by reference to swap two numbers using bit-wise operator.

/* Call by Reference:To Swap two Numbers using Bit-wise operators */
#include<stdio.h>
/* swap () to swap two numbers using bitwise operator */
void swap ( int *numFirst, int *numSecond )
{
   *numFirst  = *numFirst ^ *numSecond ;
   *numSecond = *numFirst ^ *numSecond ;
   *numFirst  = *numFirst ^ *numSecond ;
}
int main ()
{
     int numOne = 15;
     int numTwo = 12;
     printf( "\nBefore swapping, numOne %d and numTwo %d\n", numOne, numTwo );
     /* Call by reference to swap ( ) */
     swap ( &numOne, &numTwo );      
     printf( "\nAfter swapping, numOne %d and numTwo %d\n", numOne, numTwo );
    return 0;
}

Here is the C program using method 2 i.e. call by value to swap two numbers using bit-wise operator.

/* Call by value : To Swap two Numbers using Bit-wise operators */
#include<stdio.h>
void swap ( int numFirst, int numSecond )
{
   numFirst  = numFirst ^ numSecond ;
   numSecond = numFirst ^ numSecond ;
   numFirst  = numFirst ^ numSecond ;
   printf( "\nAfter swapping, numOne %d and numTwo %d\n", numFirst, numSecond );
}  
int main ()
{
  int numOne = 15;
  int numTwo = 12;
  printf (" \nBefore swapping, numOne %d and numTwo %d\n", numOne, numTwo );
     /* Call by value to swap ( ) */
     swap ( numOne, numTwo );
    return 0;
}

To contribute :

” If you like Advance Computing and would like to contribute, you can  mail your article to “computingadvance@gmail.com”. You will get credit as your name , email id, designation with article on this blog. “