🚀 go-pugleaf

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 CristofaroAristotle 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