#include <stdio.h>

#define X 1^2

int main(void) {
#if X
	puts("X is true.");
#else
	puts("X is false!");
#endif	

#if X+0
	puts("X+0 is true.");
#else
	puts("X+0 is false!");
#endif	

#if X+0 != 0
	puts("X+0 != 0 is true.");
#else
	puts("X+0 != 0 is false!");
#endif	
	return 0;
}