Re: Look for a mother of a child
Feliks Kluzniak <[email protected]>
| Newsgroups | gmane.comp.ai.prolog.swi |
|---|---|
| Message-ID | <[email protected]> |
> female(X). should be female( X ), (a comma instead of a dot). — F. On Mar 8, 2014, at 16:13, Roelof Wobben <[email protected]> wrote: > Thanks, > > > One last problem. > > > I want to print the answer in a sentence like this > > > The mother of Child is Mother. > > > So I tried this: > > > > mother(Child):- > > > > write('De moeder van'), > > > > write(Child), > > > > write('is'), > > > > > parent(X, Child), > > > > female(X). > > > > write(X). > > > > > But I do not work. > > How can I make this work. > > > Roelof > > > > ---------------------------------------- >> Subject: Re: [SWIPL] Look for a mother of a child >> From: [email protected] >> Date: Sat, 8 Mar 2014 09:47:58 -0500 >> To: [email protected] >> >> Your rule for mother/1 uses the lower case atom 'child', so it is only defined >> for this binding. >> >> I believe you want to rewrite as >> >> mother(Child) :- parent(X,Child), female(X). >> >> >> Vince Marchetti >> >> On Mar 8, 2014, at 9:09 AM, Roelof Wobben wrote: >> >>> Hello, >>> >>> >>> I have these facts: >>> >>> >>> male(roelof). >>> >>> male(mans). >>> >>> male(jan). >>> >>> >>> female(chantal). >>> >>> female(tamara). >>> >>> female(marie). >>> >>> >>> parent(roelof,tamara). >>> >>> parent(mans, roelof). >>> >>> parent(jan, chantal). >>> >>> parent(marie, roelof). >>> >>> parent(chantal, tamara). >>> >>> >>> mother(child):- >>> >>> parent(X, child), >>> >>> female(X). >>> >>> >>> But when I do mother(tamara). I see no where I expected to see chantal. >>> >>> >>> Did I do something wrong or does swi-prolog do something wrong ? >>> >>> >>> Roelof >>> _______________________________________________ >>> SWI-Prolog mailing list >>> [email protected] >>> https://lists.iai.uni-bonn.de/mailman/listinfo.cgi/swi-prolog >> >> Vincent Marchetti >> [email protected] >> >> >> > _______________________________________________ > SWI-Prolog mailing list > [email protected] > https://lists.iai.uni-bonn.de/mailman/listinfo.cgi/swi-prolog