Xref: news2.mv.net comp.os.msdos.djgpp:904
From: weiqigao AT crl DOT com (Weiqi Gao)
Newsgroups: comp.os.msdos.djgpp
Subject: acos(2.0) problem?
Date: Wed, 07 Feb 1996 22:35:39 GMT
Organization: CRL Dialup Internet Access
Lines: 47
Message-ID: <4fb9h5$ik8@nntp.crl.com>
NNTP-Posting-Host: crl8.crl.com
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

After downloading the DJGPP v.2.00 from ftp.coast.net yesterday, I
started my testing today.

My first program is:

==================
#include <math.h>
#include <errno.h>
#include <stdio.h>

main()
{
  acos(2.0);
  perror("Auch");
}
==================

which I compiled with

=====================
gcc -g test.c -o test
=====================

I was expecting a output of "Auch: ERANGE Error", but instead I got
the following

=================================================================
Exiting due to signal SIGFPE 
Floating Point exception at eip=00001e72
eax=00000002 ebx=0004c140 ecx=0004f04c edx=00000033 esi=00000054
edi=00009ac4
ebp=00049a9c esp=00049a90 cs=00e7 ds=00ef es=00ef fs=0097 gs=00ff
ss=00ef
Call frame traceback EIPs:
  0x00001e72
  0x00001a8b
=================================================================

I was on a P5-75/16MB/DOS6.22/4DOS.  (And Microsoft's Visual C++ did
make test.exe print the expected message.

What did I do wrong?

--
Weiqi Gao
weiqigao AT crl DOT com