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From: mike@drd.com (Mike Rovak)
Newsgroups: comp.lang.pascal
Subject: Re: (none)
Summary: Piece of cake
Keywords: parse algebraic expression
Message-ID: <1991Apr12.123137.8905@drd.com>
Date: 12 Apr 91 12:31:37 GMT
References: <26538@adm.brl.mil>
Sender: Mike Rovak
Organization: DRD Corporation
Lines: 42

In article <26538@adm.brl.mil> AL282247%VMTECSLP.BITNET@uga.cc.uga.edu ( J Picazzo) writes:
>Hi,
>  You asked about processing an equation in run-time. Well, PASCAL is a
>compiler, so once you've compiled a program, you can't change the code.
>  What you can do is implementing a routine that analizes the equation using
>stacks or binary trees (it's a hard one, the equation must be given in a
>string, and analyzed part by part).
>  I remember I've done something like that once, but I couldn't find it. If I
>find some routines that work, I'll send them to you. Good luck.
>
>                            J Picazzo
>                           ITESM Campus San Luis - MEXICO

I have in my hand the Turbo Pascal 3.0 source code to a complete working
program which uses an ASCII file data dictionary (which can be extended) 
and an arbitrary algebraic expression supplied by the user from the terminal
to convert the expression to postfix form and plot the equation using 
specified ranges.

I did not write this code, I got from "SOMEWHERE" so I would recommend that
you do not use it commercially since the copyright is not ours.  I do recall
that it may be used freely for personal use.

I'm sure that you could easily use these routines and make them do
whatever you want.

However, I have it here only in hardcopy, I have it at home on disk
"SOMEWHERE."  How do you want it?  If you want it email, send me a good
email address, and I'll tear the house up looking for that disk, which
may take a few days.  If you can't wait, I CAN FAX it to you, send me
your FAX number, or I can snail it to you.

-- Mike

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