Path: utzoo!mnetor!uunet!husc6!linus!mbunix!bwk
From: bwk@mitre-bedford.ARPA (Barry W. Kort)
Newsgroups: comp.ai.neural-nets
Subject: Re: Hopfield Neural Network Simulator
Message-ID: <29304@linus.UUCP>
Date: 15 Apr 88 20:22:39 GMT
References: <1314@hubcap.UUCP> <10370001@hpcllmv.HP.COM>
Sender: news@linus.UUCP
Reply-To: bwk@mbunix (Barry Kort)
Organization: The MITRE Corporation, Bedford, Mass.
Lines: 27
Summary: Mystery solved.  You can all return to work now.

I, too, had to do a bit of detective work to fix hopfield.c:

First of all, the pre-processor variables "MOD", "AND", "NOT", and "OR"
are defined in "local.h", except that they are spelled "Mod", "And",
"Not", and "Or".  I converted them to ALL UPPER CASE in "local.h"
and that problem disappeared.

Secondly, I guessed at the link libraries needed to resolve the
external function calls.  They turned out to be the math lib (-lm),
the term lib (-ltermlib)  and the curses lib (-lcurses).
I have added the following comment to my copy of hopfield.c so that
future users don't have to go into Sherlock mode to compile it:

/*
        To Compile:

                cc -o hopfield hopfield.c -lm -lcurses -ltermlib

*/

I enjoy playing with interesting software like hopfield.c, but life
would be easier if the creators of such programs would include comments
on compilation, run-time switches, etc.  Now if I could only figure
out the rest of the story behind Hopfield Networks, I would understand
what the program does!  :-)

--Barry Kort