Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!ucbvax!bloom-beacon!usc!polyslo!csun!solaria!ecphssrw@winston.csun.edu
From: ecphssrw@winston.csun.edu (Stephen Walton)
Newsgroups: comp.sys.amiga
Subject: Re: Manx and floats
Message-ID: <675@solaria.csun.edu>
Date: 28 Apr 89 01:35:01 GMT
References: <13477@louie.udel.EDU>
Sender: ecphssrw@solaria.csun.edu
Reply-To: ecphssrw@winston.csun.edu (Stephen Walton)
Organization: California State Univ., Northridge
Lines: 25
In-reply-to: mermelstein@inrs-telecom.uquebec.ca (Lois Mermelstein)

In article <13477@louie.udel.EDU>, mermelstein@inrs-telecom (Lois Mermelstein) writes:
>My setup for using Manx 3.6a with floats is
>	#include <math.h> [somewhere near the top of my source code]
>	compile using cc [filename]  [no options]
>	link using ln [filename.o] -lm -lc
>
>you'll discover that SDB won't
>be able to tell you the correct values of any floating point (float OR
>double) variables...

This is because SDB was apparently compiled with the IEEE format.  Use the
+FI switch and link with -lmx or -lma.  The latter uses CBM's mathieeedoubbas-
.library, which will use a 68881 on a system with one and software without.
+F8 of course requires a 68881 and linking with -lm8 (and also works with SDB).

>I also had a problem with fscanf; I think using %e helped it, but I
>don't remember if I ever figured out *why*

Just remember (1) pass pointers to scanf and (2) if you pass a pointer to
double instead of a pointer to long, precede the conversion character by
l (that's lower-case letter ell), as in "%le" or "%lf".
--
Stephen Walton, Dept. of Physics & Astronomy, Cal State Univ. Northridge
RCKG01M@CALSTATE.BITNET       ecphssrw@afws.csun.edu
swalton@solar.stanford.edu    ...!csun!afws.csun.edu!ecphssrw