(* Fibonacci -- Compute Fibonacci numbers

BSD Owl Scripts (https://bitbucket.org/michipili/bsdowl)
This file is part of BSD Owl Scripts

Copyright © 2005–2014 Michael Grünewald

This file must be used under the terms of the CeCILL-B.
This source file is licensed as described in the file COPYING, which
you should have received as part of this distribution. The terms
are also available at
http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.txt *)

(** Compute Fibonacci numbers.

The 0-th and 1-st Fibonacci numbers [F_0] and [F_1] are 1, and then [F_n+2
= F_n + F_n+1]. *)
val calc : int -> Num.num

val phi_string : int -> string
