#include <stdio.h>

// To experiment with the DEBUG symbol, try to define it as follows
// gcc -DDEBUG -Wall -g -o conditional conditional.c
#ifdef DEBUG
#define PRINT(message) printf("%s:%d %s\n",__FILE__,__LINE__,message);
#else
#define PRINT(message) 
#endif

int main() {

  int a = 5;
  int b = 10;

  PRINT("got here...");
  PRINT("how about here...");

  printf("a+b is %d\n", a+b);
  return 0;
}