Swap two numbers using bitwise operators

   #include <stdio.h>
   int main()
   {
     int i = 65;
     int k = 120;
     printf("\n value of i=%d k=%d before swapping", i, k);
     i = i ^ k;
     k = i ^ k;
     i = i ^ k;
     printf("\n value of i=%d k=%d after swapping", i, k);
     return 0;
   }