iterated_fctrl_4bts_limit

#include <stdio.h>

int
main ()
{
  int a = 23;
  int runner = 1;
  int b = a;
  if (a == 0)
    {
      printf ("%d", 1);
    }
  else if ((a > 0) && (a < 13))
    {
      while (runner < b)
    {
      a = a * runner;
      runner = runner + 1;
    }
    }
  else if ((a < 0) || (a > 12))
    {
      return 0;
    }
  printf ("%d", a);

  return 0;
}