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yap-6.3/Logtalk/examples/shapes/ph/square.lgt
pmoura 0df93ffc6e Logtalk 2.15.6 files.
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@970 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
2004-02-09 14:18:27 +00:00

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:- object(square,
extends(regular_polygon)).
:- info([
author is 'Paulo Moura',
version is 1.0,
date is 2003/2/3,
comment is 'Geometric square.']).
nsides(4).
area(Area) :-
::side(Side),
Area is Side*Side.
:- end_object.