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Gprolog Tutorial


collect(L) :- retract(queue(X) ) , !, (X == bottom, !, L=[] ; L=[X | Rest], collect(Rest) ). C:\GNU-Prolog\bin\gprolog.exe --init-goal halt Regards Ricky Previous Message by Thread: PL_PATH and making CLIP I am helping the group from Brandeis University port the clip application from Linux to the Windows platform.  I tried using an alternate syntax involving two separate rules for disjunction, but I had the same issue, which now makes me think there's something bigger that I'm doing wrong. Sorry but I don't understand which part of my code you are looking at can you print the line.

You should show your code. With respect to the negation, I meant to say \+ with the first part, but I forgot to double the \ sign. chasingamy 2008-01-27 17:58:13 UTC #9 Thanks for the reply, I do not quite understand what you are trying to say though. Separate namespaces for functions and variables in POSIX shells more hot questions question feed about us tour help blog chat data legal privacy policy work here advertising info mobile contact us

Gprolog Tutorial

Is it dangerous to use default router admin passwords if only trusted users are allowed on the network? "Full-time Employment is a Loophole in the Law to Make Wages Lower"? Beware that this rule is not sufficient. Everything works. You are definitely on the right track.

  1. You should indente your code.
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  3. There are some persons for which the fact male(p) is redundant, because they are also fathers of someone else.
  4. GNU Prolog 1.4.2 By Daniel Diaz Copyright (C) 1999-2012 Daniel Diaz | ?- Duke PL Course member atm15 commented Feb 28, 2013 Nope, I'm using what was included in the VM
  5. ERROR The requested URL could not be retrieved The following error was encountered while trying to retrieve the URL: Connection to failed.
  6. GNU's implementation of Prolog up until 1.4.0 only had the fail/0 predicate (per the ISO Prolog standard)w rather than the false/0 predicate.
  7. likes(grommit, cheese).
  8. GBiz is too! Latest News Stories: Docker 1.0Heartbleed Redux: Another Gaping Wound in Web Encryption UncoveredThe Next Circle of Hell: Unpatchable SystemsGit 2.0.0 ReleasedThe Linux Foundation Announces Core Infrastructure
  9. Duke PL Course member sudowork commented Feb 28, 2013 @atm15 Apologies about this.

I'd just check over the syntax again. However, I was trying to do this: Define (Add into the database) a rule called is_male(X) that returns "yes" (or "true") if X is the father of somebody. Former boss asking me to do presentations Encode the alphabet cipher What was the first operating system to feature a separate kernel? Where would I need to add another argument?

yes | ?- even(c). male(mark). female(sonya). http://stackoverflow.com/questions/29888420/prolog-uncaught-exception-error Once you completed the definition of is_male/1, you can determine the sex of a person p by calling is_male(p) instead of checking the fact male(p).

Solutions? I can compile the smath directory of clip (see clip instructions), but when I execute the 'make clip' command', I get the error 'cannot find the path for GNU Prolog, set Any ideas? You must write a predicate path/3 It is not a good method to use the same name for a predicate and an argument.

Gnu Prolog

likes(wallace, cheese). https://lists.gnu.org/archive/html/users-prolog/2009-03/msg00006.html Whenever I use 'halt' in the "init-goal", there is a dialog box popped up at the end saying "Program terminated". Gprolog Tutorial Lengthwise or widthwise. Prolog Not Is there any way to get rid of it?

female(jodi). compile with: [email protected]:~/prog/prolog$ gplc nubble.pro execute with: [email protected]:~/prog/prolog$ ./nubble This is what you get: GNU Prolog 1.3.0 By Daniel Diaz Copyright (C) 1999-2007 Daniel Diaz | ?- even(X). male(arnold). On SWI-Prolog, it makes extend([Node | Path], NewPaths) :- search([NewNode, Node |Path], (path(Node, NewNode, Path), not(member(NewNode, [Node | Path]))), NewPaths), !. Swi Prolog

Already have an account? From the GNU Prolog Intro I got the following example, stored in HelloWorld.pl. search(X,Goal,Xlist) :- call(Goal), assertz(queue(X)), fail; assertz(queue(bottom)), collect(Xlist). C:\GNU-Prolog\bin\gprolog.exe --init-goal halt Regards Ricky

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What problem are you working on? It's all correct. Prolog 1.3.1 could not be installed in my Mac, I'm using prolog 1.4.0.

Is there a way to just negate an input on its own?

even(b). parent(hank,ben). uncaught exception: error(existence_error(procedure,even/1),top_level/0) not sure if the installation was wrong, but got not errors or I'm missing something very simple. and not directly copying and pasting into the prompt?

Thanks in adv. reply via email to [Prev in Thread] Current Thread [Next in Thread] uncaught exception: error(existence_error(procedure,even/1),top_level/0), James Gale<= Re: uncaught exception: error(existence_error(procedure, even/1), top_level/0), John Velman, 2009/03/06 Prev by Date: Re: Users-prolog asked 2 years ago viewed 1919 times active 2 years ago Related 1Simple graph search in Prolog3Prolog Rule - need help with getting something working?0Prolog Beginner: Trivial Example that I cannot Modify functions in R using body, formals and environment methods Is giving my girlfriend money for her mortgage closing costs and down payment considered fraud?

Furthermore, using the ; operator for disjunction, I'm getting the same error after a few cases. prolog share|improve this question edited Jan 4 '12 at 13:12 skaffman 278k63619658 asked Apr 6 '11 at 7:16 Hongseok Yoon 1,07541837 add a comment| 1 Answer 1 active oldest votes up uncaught exception: error(existence_error(procedure,(:-)/2),top_level/0) | ?- halt. female(sofia).

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