#include <stdio.h>


     #define WARN_IF(EXP) \
     do { if (EXP) \
             fprintf (stderr, "Warning: " #EXP "\n"); } \
     while (0)
#define STRINGIFY(ARG) " #ARG "
int main(void){
	enum e_e{E0,E1,E2} e=E1;
	
	printf("%s %s\n",STRINGIFY(e),STRINGIFY(E1));
	WARN_IF(E1);
	return e;
}