Question

How to swap two numbers with the bitwise operator in C

Answer 1

#include <stdio.h>

void swap(int* a, int* b) {
    *a = *a ^ *b;
    *b = *a ^ *b;
    *a = *a ^ *b;
}

int main()
{
    int a = 3, b = 7;

    printf("Before swapping: a = %d, b = %d\n", a, b);
    
    swap(&a, &b);
    
    printf("After swapping:  a = %d, b = %d\n", a, b);

    return 0;
}


  
  
  
/*
run:
  
Before swapping: a = 3, b = 7
After swapping:  a = 7, b = 3
  
*/

 

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