From: Thomas Martitz <thomas.martitz@student.htw-berlin.de>
To: gcc-help@gcc.gnu.org
Subject: Re: infinite for-loop and related question
Date: Wed, 16 Feb 2011 23:22:00 -0000 [thread overview]
Message-ID: <4D5C576D.3060107@student.htw-berlin.de> (raw)
In-Reply-To: <AANLkTi=OznL9_-pyuT7iRo_F-vuFaeYf6eRO87i4idmQ@mail.gmail.com>
Am 16.02.2011 22:49, schrieb Jonathan Wakely:
> On 16 February 2011 21:37, Bob Plantz wrote:
>> On 02/16/2011 12:41 PM, Jason Mancini wrote:
>>> Though I still find the output of this odd:
>>>
>>> for (char i(1); i>0; ++i)
>>> printf("%d %d\n", i, sizeof(i));
>>>
>>> ...
>>> 362195 1
>>> 362196 1
>>> 362197 1
>>> ...
>>>
>>> For very large values of char! ^_^
>>>
>>> Jason
>> That's odd. With g++ 4.4.5 on an x86-64 machine in 64-bit mode I get:
>>
>> ---
>> 125 1
>> 126 1
>> 127 1
>>
>> which is what I would expect. That is, i is a (signed) char, and when it
>> goes over 127 it becomes a negative number, so the loop terminates.
> That would be the expected result if char was unsigned.
Not exactly, no? An unsiged char goes to 255.
Best regards.
next prev parent reply other threads:[~2011-02-16 23:02 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-16 20:17 Jason Mancini
2011-02-16 20:41 ` Jonathan Wakely
2011-02-16 21:37 ` Jason Mancini
2011-02-16 21:49 ` Bob Plantz
2011-02-16 23:00 ` Jonathan Wakely
2011-02-16 23:22 ` Thomas Martitz [this message]
2011-02-17 6:31 ` Jonathan Wakely
2011-02-17 10:36 ` Axel Freyn
2011-02-17 12:23 ` Jonathan Wakely
2011-02-17 13:16 ` Axel Freyn
2011-02-17 14:08 ` Jonathan Wakely
2011-02-16 23:00 Bill McEnaney
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