Print the results in a txt file with prolog

Question

I'm using Prolog with clpd to solve boolean problems. I have rules like this one below:

:- use_module(library(clpb)).

fun(A, B, C, D, E) :-
    sat(A + B + C, D),
    sat(E),
    labeling([A, B, C, D, E]);

Is possible to print the results in a file? How can I do?

Answer 1

Your code had some simple mistakes. You could try this version (changed some small things):

:- use_module(library(clpb)).

fun(A, B, C, D, E) :-
    open('test1234.txt',write,ID),
     (  sat(A + B + C + D),
        sat(E),
        labeling([A, B, C, D, E]),
        write(ID, labeling([A, B, C, D, E]) ),nl(ID), fail
        ;   close(ID)
      ).

Now if you query:

?- fun(A,B,C,D,E).
true.

"test1234.txt" will e created in your current working directory. The "test1234.txt" file contains:

labeling([0,0,0,1,1])
labeling([0,0,1,0,1])
labeling([0,0,1,1,1])
labeling([0,1,0,0,1])
labeling([0,1,0,1,1])
labeling([0,1,1,0,1])
labeling([0,1,1,1,1])
labeling([1,0,0,0,1])
labeling([1,0,0,1,1])
labeling([1,0,1,0,1])
labeling([1,0,1,1,1])
labeling([1,1,0,0,1])
labeling([1,1,0,1,1])
labeling([1,1,1,0,1])
labeling([1,1,1,1,1])