#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define PRINT_VAR(X)\
printf(#X " is %d at address %p\n, X, &X);
#define SWAP(A, B) A ^= B ^= A ^= B;
int main(int argc, char* argv[]) {
int a = 3;
PRINT_VAR(5);
int x = 2, y = 5;
printf("%d %d\n", x, y);
SWAP(x, y);
printf("%d %d\n", x, y);
return 0;
}