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  1. parent( mary, john ).
  2. parent( ann, mary ).
  3. female( mary).
  4. mother( X, Y) :- parent( X, Y), female( X).
  5. grandparent( X, Y) :- parent( X, Z), parent( Z, Y).
Success #stdin #stdout 0.02s 68352KB
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GNU Prolog 1.3.1
By Daniel Diaz
Copyright (C) 1999-2009 Daniel Diaz
https://ideone.com/ZuGIn
language:
Prolog (gprolog 1.4.5)
created:
14 years ago
visibility:
public

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