Parsing a string formula to an integer result

Question

I\'m doing some parsing work, too complex to get into details, but there\'s one simple thing I need to do (at least simple concept, maybe not simple answer). I might have a

Answer 1

Parser10, written originally by Renate Schaaf for Delphi 1 and later upgraded to Delphi2 and 3 by Alin Flaider and Stefan Hoffmeister, is a fairly simple math parser. It will do the job for simple expressions and can serve as a boilerplate for more complex work.

It is not built for speed though.

Update :

Hallvard Vassbotn made an update of Parser10 and added some documentation. Load it from here.