#include <stdio.h>

/* C Description: Macros usage example
 *
 * __DATE__ - current date ( MMM DD YYYY )
 * __TIME__ - current time ( HH:MM:CC )
 * __FILE__ - current filename as a string
 * __LINE__ - current line number as a decimal
 * __STDC__ - equals to 1 is compiler compiles with the ANSI standard
 */

#ifndef DEBUG
  #define DEBUG 1
#endif


#define  average(x,y)  \
   (x+y)/2.


#define MAX(x,y) (x > y ? x : y)

int main() {


   if (DEBUG) {

      printf("File :%s\n", __FILE__ );
      printf("Date :%s\n", __DATE__ );
      printf("Time :%s\n", __TIME__ );
      printf("Line :%d\n", __LINE__ );
      printf("ANSI :%d\n", __STDC__ );
   }

   printf(" Average 1: %6.2f\n", average(7.5, 9.3));
   printf(" Average 2: %6.2f\n", average(7, 8));


   printf(" Maximum value: %6.2f\n", MAX(7.5, 9.3));
}