Re: Writing an expression evaluator

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#26

From: G. C. Straty
Date: Sat, 17 Feb 1996 00:00

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Aristotle wrote:
> 
> Does anyone have any tips on how to go about writing an expression
> evaluator(one complex enough to handle Trig. functions). I am writing a
> program that uses expression and I would like to have the user be able to
>  enter their own expressions and have my program implement them. Any help
>  would be appreciated. Thanks in advance!
> 
>                                 John M. "Aristotle" De Cristofaro

Borland Pascal-3 (if you can remember that far back) included
source code for what they called MicroCalc, sample code for a
basic spread sheet. In that code was a reasonably good function 
interpreter and evaluator which I have used often with good results. 
It will handle fairly complicated expressions as long as parens are
not to deep. In digging through my stack of old 5.25 DDs I found 
I still have it. If you are interested, I would be happy to make it
available to you.

straty@bldrdoc.gov

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From: "G. C. Straty" <straty@harrier.bldrdoc.gov>
Newsgroups: comp.lang.pascal.misc,comp.lang.pascal.borland,comp.programming,comp.lang.misc,comp.lang.c,comp.lang.c++
Subject: Re: Writing an expression evaluator
Date: Fri, 16 Feb 1996 17:00:47 -0700
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