Re: Lua without stdio?

[Shmuel Zeigerman <shmuz@...>]

David Kastrup wrote:
> That's all pretty useless since there is no standard behavior for
> (int)x, and besides, (int)x may overflow.
>
> If we disregard overflow, of course it is easiest to just do
>
> double floor(double x)
> {
>   double y = (double)(int)x;
>   return y > x ? y-1.0 : x;
> }

You're right with regards to overflow. Your version of floor is however 
buggy. Here is a shortened version:

double floor(double x)
{
  double y = (double)(int)x;
  return (x >= 0 || x == y) ? y : y-1;
}

--
Shmuel