#include <stdio.h>

#define Test

int main()
{
   int a = 3, b = 5, c;

   c = a * b;
   #ifdef Test
      printf("Variableninhalte:\n");
      printf("a = %i\nb = %i\nc = %i\n", a, b, c);
   #else
      printf("Ergebnis von %i mal %i ist %i\n", a, b, c);
   #endif

   return 0;
}