Question

How to swap two integers using XOR (^) in C

Answer 1

#include <stdio.h>     

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

int main(void)
{
    int a = 7, b = 3;
    
    swap(&a, &b);
    
    printf("a = %d b = %d\n", a, b);
    
    return 0;
}

/*
run:

a = 3 b = 7

*/

 

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