Please note this is a completely separate question about Prolog programming as I can not figure how to simply start a new post.
LPA WIN-PROLOG 4.600 - S/N 0014307049 - 05 Sep 2005
Copyright (c) 2005 Logic Programming Associates Ltd
Licensed To: Stephen Earl Kirk
The above is the opening text when executing my LPA Win-Prolog application.
I first sent this email to LPA Prolog, but have not received any response.
I have been working for over 25 years with LPA Prolog – I have worked with their MacProlog versions as well as several Win-Prolog versions. I have worked mostly closely with Nicky Johns and some with Brian Steel.
I have been moderately to severely ill in the last 15 years. However I am back on a Ph.D. track and I desire to use Prolog as the scripting and programming language in my ultimate doctoral dissertation.
I have a very simple question. I am sure that I have done this Prolog programming before, but at the moment – I have just become overly frustrated by my inability to solve it.
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I would like simply to create a Prolog program, which will read from a text file, each character by character.
That is it. I feel that I should know this, as I know that I have done this before. But I have some sort of mental block disabling me as to remembering how exactly to do it.
I am using LPA WIN-PROLOG 4.600. In the below example, I do have the text file:
My current Prolog script is as follows.
open('C:\dell\temp.txt', read, In),
process_stream(end_of_file, _) :-
process_stream(Char, In) :-
When I execute the script. The output looks like:
| ?- a.
! Error 22 : Instantiation Error
! Goal : open('C:\dell\temp.txt',read,_51760)
It has been a few years, since I have devoted myself to programming in Prolog. But I have done this type of programming before and I cannot comprehend, why I cannot remember how to do it. . . Help, please?
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Take Care and God Bless!
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