Read a txt file

[jayyy]

Hello,

I have problems with read a simple txt file.

If the txt file is just one number and I use this code :

19 ?- open('lezen.txt',read,S),read(S,X).

I always get :
ERROR: lezen.txt:1:0: Syntax error: Unexpected end of file

what am I doing wrong?

 

[joel76]

read/2 is used to read prolog terms, you must end with a dot.

 

[jayyy]

is there a way to read files that doesn't end with a dot?

 

[joel76]

With SWI-Prolog, you can use read_line_to_codes/2.
e.g

test :-
	open('c:/travail/developpements/prolog/toto.txt', read,S),
	read_line_to_codes(S,X),
	close(S),
	writeln(X).

The file toto.txt contains
"salut
"
you get

1 ?- test.
[115, 97, 108, 117, 116]
true.

 

[jayyy]

Thanks