Простой вопрос про div()

  - Function: div_t div (int NUMERATOR, int DENOMINATOR)
      This function `div' computes the quotient and remainder from the
      division of NUMERATOR by DENOMINATOR, returning the result in a structure of type `div_t'.
 
      If the result cannot be represented (as in a division by zero), the
      behavior is undefined.
 
      Here is an example, albeit not a very useful one.
 
           div_t result;
           result = div (20, -6);
 
      Now `result.quot' is `-3' and `result.rem' is `2'.