Question

How to swap two numbers using bitwise XOR in C

Answer 1

#include <stdio.h>
 
int main() 
{ 
    int a = 5, b = 13;
     
    a = a ^ b;
    b = a ^ b;
    a = a ^ b;
  
    printf("a = %d\nb = %d\n", a, b);
     
    return 0;
}
 
 
 
/*
run:
 
a = 13
b = 5
 
*/

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Answer 2

#include <stdio.h>
  
int main() 
{
   int x = 5;
   int y = 9;
     
   x ^= y; 
   y ^= x; 
   x ^= y;
     
   printf("%i %i", x, y);
    
   return 0;
}
  
  
  
/*
run:
  
9 5
  
*/

 

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