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#define NO_FAULT 0
#define NULLDIV 1
#define INT_DIV_BECOMES_SMALLER_NULL 2

int last_math_fault = 0;


void math_fault(int new_error)
{
   last_math_fault = new_error;
}

int Get_last_math_fault (void)
{
   return last_math_fault;
}

int div(int a, int b)
{
   if (b==0) {
       math_fault(NULLDIV);
       return 0;
   }
   if (b > a) {
       math_fault(INT_DIV_BECOMES_SMALLER_NULL);
       return 0;
   }
   math_fault (NO_FAULT);
   return a/b;
}


int main (void)
{
   int return_value = div(5,0);
   if (Get_last_math_fault != NO_FAULT) {
      printf("Da war was...");
      if (Get_last_math_fault == NULLDIV) {
         printf("Division durch 0!");
      }
   }
   return return_value;
}