?? ch04ex06.pro
字號:
/*
Turbo Prolog 2.0 Chapter 4, Example Program 4
Copyright (c) 1986, 88 by Borland International, Inc
*/
domains
person = symbol
predicates
father(person) /* This person is a father */
father(person, person) /* One person is the father of the other person */
clauses
father(Man) :-
father(Man,_).
father(adam, seth).
father(abraham, isaac).
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