From: Steve Chapel <schapel AT utilicom DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Theory about parsing equations (functions)
Date: Fri, 16 Oct 1998 19:22:25 -0700
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"Fernando J.A. Silva (aka ^Magico^)" wrote:
> 
> Hi.
> I need to know how to parse an equation, and how it works!
> If someone knows some theory or knows where I can find some info about
> it, or source code. I'll prefer some explanations or some tutors about
> it.
> Thanks in advance,
>    Fernando J.A. Silva  (aka ^Magico^)

The de facto standards for lexing and parsing are Lex and Yacc.
The GNU equivalents are Flex and Bison.

The classic text on the matter is the "Dragon Book" by (I think)
Aho, Hopcroft, and Ullman. Anyway, probably two of those guys were
involved somewhere along the line. :-) I forget what's it's called,
but I just look for the book with the dragon on the cover.

If you want some simpler material, Bjarne has a recursive descent
parser calculator as an example in all three editions of his
_The C++ Programming Language_.
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