From: thecrux@gmail.com
To: ALT Linux Team development discussions <devel@lists.altlinux.org>
Subject: Re: [devel] [JT] Вопрос про работу ceil() из ANSI C, баг или не баг?
Date: Wed, 19 Oct 2011 13:33:02 +0400
Message-ID: <20111019093302.GA28852@mail.truecrux.org> (raw)
In-Reply-To: <CAJXf7QPmWHVjVG=mGzo2jbkLzxe-woLBWDBSbxgmV9riohOrwA@mail.gmail.com>
On Wed, Oct 19, 2011 at 12:16:49PM +0300, Igor Zubkov wrote:
> 2011/10/19 Anatoly Lyutin:
> > 19.10.2011 13:11, Denis Medvedev пишет:
> >>
> >> Все нормально.
> >> Результат целочисленного деления 5/2 = 2
> >> ceil(2)=2
> >> Результат плавающего деления 5.0/2 =2.5
> >> ceil(2.5)=3
> >
> > Да, точно, перегрелся.
> > Если сделать ceil(5/2.0), то всё работает правильно, конечно.
>
> В ruby так же:
> ruby-1.8.7-p352 :001 > 5/2
> => 2
> ruby-1.8.7-p352 :002 > 5/2.0
> => 2.5
> ruby-1.8.7-p352 :003 >
а Perl ведёт себя так, только если использовать прагму integer
say 5/2; # 2.5
use integer;
say 5/2; # 2
а в python даже придумали оператор //
>>> 5//2.0
2.0
--
Vladimir Lettiev aka crux ✉ theCrux@gmail.com
prev parent reply other threads:[~2011-10-19 9:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-19 9:19 ` [devel] " Anatoly Lyutin
2011-10-19 9:16 ` Igor Zubkov
2011-10-19 9:33 ` thecrux [this message]
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