Hello, I have a solution for the bridge crossing problem (4 people crossing a bridge with a time of 1,2,5,10 with a torch and they need to take the torch back as long as they didnt all crossed the bridge). here is my code : time(b,1). time(e,2). time(a,5). time(l,10). traverser(Tmax,[],MembresRe…

When I tried your program, (in file /tmp/pont.pl), I got these warnings: Warning: /tmp/pont.pl:6: Warning: Singleton variables: [Tmax,MembresResDG,Temps,Transitions] You might start by looking at those. Also, what is the form of your query? I got this: ?- traverser(Tmax,MembresResGD,MembresRe…

[image] peter.ludemann: PS: When posting, if you surround your code with triple back-quotes, it preserves the layout. I fixed it for them.

Hello, the call you have to do for the function traverser is traverser(17,[b,e,a,l],[],0,[]). The idea is that you start the problem with 4 guys on left of the bridge. You start to move 2 guys on the right and examine if you still have people on the left. If they are not 0, (and that s the po…

i tried the triple quote but i am not sure of what i did. Can you tell me if its ok.

[image] XavierDebecq: i tried the triple quote but i am not sure of what i did. You used “”" when you need to use ```, e.g. ``` Prolog code goes here ``` See: Language highlighting

First, a minor thing: you can test for a zero-length (empty) list by MembresResDG2 = [_|_] – that is, it has at least one member. (Alternatively: MembresResDG2 \= []). Also, your debug output would be easier to read if you used writeln/1. I think you need to think in terms of “what conditions allo…

The fact of having at least in the worst case 2 elements for the two select is garanteed by the test. My problem is that i have no if then else. I reworked my code and got an error i still not understand. My problem is that i dont have any knowledge in prolog syntax. From the algorithmical point…

Perhaps it would help if you fully stated the problem (in French, if you wish – some of us can read French and Google Translate will help the others). E.g.: is it allowed for a single person to cross? Are there constraints on who can cross together? Etc. Then write down in detail (in English or Fre…

Bridge problem

Help!

EricGT November 3, 2021, 3:25pm 6

You used “”" when you need to use ```, e.g.

``` Prolog code goes here ```

See: Language highlighting

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Bridge problem

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