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Date: Fri, 25 May 2001 10:28:15 -0400
From: Christopher Faylor <cgf AT redhat DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Fw: BUG REPORT:  unexpected floating point behavior
Message-ID: <20010525102815.G22907@redhat.com>
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In-Reply-To: <000d01c0e507$64435540$0401a8c0@ntserv>; from stas@xpconsulting.com on Fri, May 25, 2001 at 03:42:27AM -0700

Welcome to the world of floating point.

cgf

On Fri, May 25, 2001 at 03:42:27AM -0700, Stan Malyshev wrote:
>
>----- Original Message -----
>From: Stan Malyshev
>To: cygwin AT cygwin DOT com
>Cc: Tennyson Lee
>Sent: Friday, May 25, 2001 3:40 AM
>Subject: BUG REPORT: unexpected floating point behavior
>
>
>Consider the following unexpected output of a simple loop that increments a
>floating value by 0.1 at every iteration:
>
>
>#include <stdio.h>
>
>int main() {
>
>  float x;
>
>  for (x = 0; x < 4; x += 0.1f) {
>    printf("x=%f\n", x);
>  }
>
>  return 0;
>}
>
>
>------------------
>
>x=0.000000
>x=0.100000
>x=0.200000
>x=0.300000
>x=0.400000
>x=0.500000
>x=0.600000
>x=0.700000
>x=0.800000
>x=0.900000
>x=1.000000
>x=1.100000
>x=1.200000
>x=1.300000
>x=1.400000
>x=1.500000
>x=1.600000
>x=1.700000
>x=1.800000
>x=1.900000
>x=2.000000
>x=2.100000
>x=2.200000
>x=2.300000
>x=2.400000
>x=2.500000
>x=2.600000
>x=2.700000
>x=2.799999
>x=2.899999
>x=2.999999
>x=3.099999
>x=3.199999
>x=3.299999
>x=3.399999
>x=3.499999
>x=3.599999
>x=3.699999
>x=3.799999
>x=3.899998
>x=3.999998
>
>
>
>
>--
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-- 
cgf AT cygnus DOT com                        Red Hat, Inc.
http://sources.redhat.com/            http://www.redhat.com/

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