Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!ux1.cso.uiuc.edu!aries!mcdonald
From: mcdonald@aries.uiuc.edu (Doug McDonald)
Newsgroups: comp.lang.c
Subject: Re: Reading in Functions
Message-ID: <1989Oct18.202238.22792@ux1.cso.uiuc.edu>
Date: 18 Oct 89 20:22:38 GMT
References: <1197@utkcs2.cs.utk.edu>
Sender: news@ux1.cso.uiuc.edu (News)
Reply-To: mcdonald@aries.scs.uiuc.edu (Doug McDonald)
Organization: ^
Lines: 17

In article <1197@utkcs2.cs.utk.edu> wozniak@utkux1.utk.edu (Bryon Lape) writes:
>
>	How does one write a procedure in C so that the user can type in
>a formula from the keyboard and the programme will graph it?  I can
>handle the graphing part, but what I want to be able to do is is have a
>programme that will read in a function and graph the result.
>
>
>-bryon-

Well, you read the formula into a char array and then either 
interpret or compile it to get a y value at each x point. There
is a program called "gnuplot" that does this, and the graphing too.
I have written a formula compiler for the 8086 and use that.
I also have an interpreter (only) that I could send you.

Doug McDonald (mcdonald@uxe.cso.uiuc.edu)