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gprolog display incorrectly a ?
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From: |
Michel Levy |
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Subject: |
gprolog display incorrectly a ? |
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Date: |
Mon, 14 Feb 2005 18:45:32 +0100 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.3) Gecko/20030314 |
Let's suppose that the predicate a is defined by
a(f(b),1).
a(f(c),2).
We execute the query
?- a(f(b),X).
X = 1?
Why Prolog display a ? although there are no remaining alternatives ?
--
Michel Levy
36 rue George Sand 38400 Saint Martin d'Hères
email : address@hidden
http://www-lsr.imag.fr/users/Michel.Levy/
- gprolog display incorrectly a ?,
Michel Levy <=