52 lines
809 B
Plaintext
52 lines
809 B
Plaintext
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:- object(polygon,
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extends(shape)).
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:- info([
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author is 'Paulo Moura',
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version is 1.0,
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date is 2003/2/3,
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comment is 'Generic polygon.']).
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:- public(nsides/1).
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:- mode(nsides(?integer), zero_or_one).
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:- info(nsides/1, [
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comment is 'Polygon number of sides.',
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argnames is ['Number']]).
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:- public(area/1).
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:- mode(area(-float), zero_or_one).
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:- info(area/1, [
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comment is 'Polygon area.',
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argnames is ['Area']]).
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:- public(perimeter/1).
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:- mode(perimeter(?atom), zero_or_one).
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:- info(perimeter/1, [
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comment is 'Polygon perimeter.',
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argnames is ['Perimeter']]).
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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 'Polygon side length.',
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argnames is ['Length']]).
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side(1). % default side length
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:- end_object.
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