Re: Strange: listing of Character values instead of the characters themselves

[Daniel Diaz]

Hello,

In GNU-Prolog a string is a simple notation of a list of character codes 
(as in most Prolog implementations).
You should use atoms instead of string. For instance replace your 
example/1 fact by:

example(['Peter','Diva','Ex','Newt','Xtra']).

And everything is OK. Alternatively you can use format('~s',[ "my 
string" ]) to display a string (but you have to do it for each element 
of the list Perm).

Daniel


Le 24/01/2011 14:36, Peter Karlsson a écrit :
> %
> % Testing permute&  select
> %
>
> test :- example(Ex), permutation(Ex, Perm),
>       write(Perm), nl, fail.
> test :- true.
>
> example(["Peter","Diva","Ex","Newt","Xtra"]).
>
>
> % Permutation&  Select
>
> %permutation(Xs, [Z|Zs]) :- select(Z, Xs, Ys), %permutation(Ys, Zs).
> %permutation([],[]).
>
> %select(X, [X|Xs], Xs).
> %select(X, [Y|Ys], [Y|Zs]) :- select(X, Ys, Zs).