#
# This software is Copyright 2005 by Elsevier Inc.  You may use it
# under the terms of the license at http://perl.plover.com/hop/LICENSE.txt .
#



###
### fib0
###

## Chapter 5 section 4.3.1

sub fib {
  my $n = shift;
  if ($n < 2) { return $n }
  fib($n-2) + fib($n-1);
}