scanf for Ruby

$Revision: 21682 $ $Id: scanf.rb 21682 2009-01-20 03:23:46Z shyouhei $ $Author: shyouhei $ $Date: 2009-01-20 12:23:46 +0900 (Tue, 20 Jan 2009) $

A product of the Austin Ruby Codefest (Austin, Texas, August 2002)