Newsgroups: comp.lang.c
Path: utzoo!henry
From: henry@utzoo.uucp (Henry Spencer)
Subject: Re: evaluating math w/o recompile
Message-ID: <1989Sep15.154336.28487@utzoo.uucp>
Organization: U of Toronto Zoology
References: <7598@goofy.megatest.UUCP> <34566@apple.Apple.COM> <556@tigger.planet.bt.co.uk> <451@siswat.UUCP> <72603@yale-celray.yale.UUCP>
Date: Fri, 15 Sep 89 15:43:36 GMT

In article <72603@yale-celray.yale.UUCP> zador-anthony@CS.YALE.EDU (anthony zador) writes:
>I would like to be able to specify the form of the function f
>at *run time* (no recompiles). That is, i would like 
>to place a line of math
>in some file and have the program read it in and evaluate it.

You can't.  There is no way that line of math can be *executed* without
compiling it (in a very broad sense of the word), so trying to do it with
no recompiles is futile.  Either you invoke the C compiler, or you write
a mini-compiler as part of your program.  *Something* has to turn the math
notation into an executable/interpretable representation of some kind.
-- 
V7 /bin/mail source: 554 lines.|     Henry Spencer at U of Toronto Zoology
1989 X.400 specs: 2200+ pages. | uunet!attcan!utzoo!henry henry@zoo.toronto.edu