From: tlaronde@polynum.com
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] Rounding off by one
Date: Mon, 19 Apr 2010 20:26:26 +0200 [thread overview]
Message-ID: <20100419182626.GA730@polynum.com> (raw)
In-Reply-To: <20100419181533.GA2071@polynum.com>
On Mon, Apr 19, 2010 at 08:15:33PM +0200, tlaronde@polynum.com wrote:
>
> Thanks for the note. But I think I have found the problem: a division by
> 2 supposed to be "floor" and that slips as (x + y) / 2: is there
> anything that guarantees that the result shall be floor, ceil or
> nearest? I find nothing in C89.
Replying to myself: K&R, C, A7.6 Multiplicative operators.
=> The problem is with negatives for which there is only a general rule.
--
Thierry Laronde <tlaronde +AT+ polynum +dot+ com>
http://www.kergis.com/
Key fingerprint = 0FF7 E906 FBAF FE95 FD89 250D 52B1 AE95 6006 F40C
next prev parent reply other threads:[~2010-04-19 18:26 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-19 15:43 tlaronde
2010-04-19 16:11 ` Martin Neubauer
2010-04-19 18:15 ` tlaronde
2010-04-19 18:26 ` tlaronde [this message]
2010-04-19 18:55 ` Federico G. Benavento
2010-04-19 19:03 ` erik quanstrom
2010-04-19 19:14 ` Federico G. Benavento
2010-04-19 19:28 ` tlaronde
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