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yap-6.3/Logtalk/examples/sicstus/square1.lgt
2001-06-06 19:40:57 +00:00

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:- object(square(Side),
extends(rectangle(Side, Side))).
:- info([
authors is 'Paulo Moura',
version is 1.0,
date is 2000/4/22,
comment is 'Parametric object for representing geometric squares.',
parnames is ['Side']]).
:- public(side/1).
:- mode(side(?number), zero_or_one).
:- info(side/1, [
comment is 'Square side.',
argnames is ['Side']]).
side(Side) :-
parameter(1, Side).
width(Width) :-
parameter(1, Width).
height(Height) :-
parameter(1, Height).
:- end_object.