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Date: | Thu, 27 Sep 2007 11:29:39 -0400 (EDT) |
From: | William Sutton <william AT trilug DOT org> |
To: | Andrew Louie <louiea AT gmail DOT com> |
cc: | cygwin AT cygwin DOT com |
Subject: | Re: strange behavior with perl v 5.8.8 |
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Nope, not a Cygwin specific issue. I get the same behavior at the same point on Gentoo perl 5.8.8 (x86 dual-Xeon), Debian Etch perl 5.8.8 (x86 P4), and SunOS 5.10 perl 5.8.4. William Sutton On Thu, 27 Sep 2007, Andrew Louie wrote: > Hello, > > I've run into a strange adding problem with perl: > > when incrementing by 0.1 i get a strange behavior where at some > arbitrary number, it will append 0.9999999999 to the end of the > number. > > test case: > ------------------------------------------------------------------------------------ > my $start = 0; > my $interval = 0.1; > my $end = 10; > > do{ print "start: $start\n"; $start += $interval;}until($start >= $end); > ------------------------------------------------------------------------------------ > Results: > ... > start: 4.5 > start: 4.6 > start: 4.7 > start: 4.8 > start: 4.9 > start: 5 > start: 5.1 > start: 5.2 > start: 5.3 > start: 5.4 > start: 5.5 > start: 5.6 > start: 5.7 > start: 5.8 > start: 5.9 > start: 5.99999999999999 > start: 6.09999999999999 > start: 6.19999999999999 > start: 6.29999999999999 > start: 6.39999999999999 > start: 6.49999999999999 > start: 6.59999999999999 > start: 6.69999999999999 > start: 6.79999999999999 > start: 6.89999999999999 > ------------------------------------------------------------------------------------ > > why all of suddun i get 5.999999999? > > Is this a perl problem? > > im using cygwin version 1.5.24 > perl -v: > > This is perl, v5.8.8 built for cygwin-thread-multi-64int > (with 8 registered patches, see perl -V for more detail) > > > -- > -Andrew Louie > > -- > Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple > Problem reports: http://cygwin.com/problems.html > Documentation: http://cygwin.com/docs.html > FAQ: http://cygwin.com/faq/ > > > -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
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