text: #include <stdlib.h>
  extern int Quoziente(size_t x, size_t y);
  
  void quoz_rec(size_t x, size_t y, int* ris) {
      if (x < y)
          return;
      *ris += 1;
      quoz_rec(x - y, y, ris);
  }
  
  int Quoziente(size_t x, size_t y) {
      if (y <= 0)
          return -1;
      int ris = 0;
      quoz_rec(x, y, &ris);
      return ris;
  }
  
  int main(void) {
      size_t x = 81, y = 9;
      printf("\n%d\n", Quoziente(x, y));
      return EXIT_SUCCESS;
  }