0df93ffc6e
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@970 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
32 lines
474 B
Plaintext
32 lines
474 B
Plaintext
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:- object(regular_polygon,
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extends(polygon)).
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:- info([
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author is 'Paulo Moura',
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version is 1.1,
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date is 2004/1/8,
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comment is 'Generic regular polygon.']).
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:- public(side/1).
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:- mode(side(?atom), zero_or_one).
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:- info(side/1, [
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comment is 'Regular polygon side length.',
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argnames is ['Length']]).
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side(1). % default side length
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perimeter(Perimeter) :-
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::nsides(Number),
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::side(Side),
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Perimeter is Number*Side.
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:- end_object.
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