21 lines
248 B
Plaintext
21 lines
248 B
Plaintext
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:- object(square,
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extends(regular_polygon)).
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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 'Geometric square.']).
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nsides(4).
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area(Area) :-
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::side(Side),
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Area is Side*Side.
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:- end_object.
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