#include <stdio.h>

long int fatorial (int n)
{
  long int parcial ;

  printf ("antes:  n: %d\n", n) ;

  if (n < 2)
    parcial = 1 ;
  else
    parcial = n * fatorial (n - 1) ;  // observe a chamada recursiva

  printf ("depois: n: %d, parcial: %ld\n", n, parcial) ;

  return (parcial) ;
}

int main ()
{
  printf ("Fatorial (6) = %ld\n", fatorial (6)) ;
  return 0 ;
}