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| From | James Kuyper <jameskuyper@verizon.net> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: confusion about behavior |
| Date | 2011-08-14 22:37 -0400 |
| Organization | A noiseless patient Spider |
| Message-ID | <j2a0pm$k5u$1@dont-email.me> (permalink) |
| References | <cda0e503-482a-4075-b3fa-af3013819716@l11g2000prh.googlegroups.com> <j296jn$p5q$1@dont-email.me> <pan.2011.08.15.02.04.50@gmail.com> |
On 08/14/2011 10:04 PM, Todd Carnes wrote:
> On Sun, 14 Aug 2011 15:10:48 -0400, James Kuyper wrote:
>
>> On 08/14/2011 02:56 PM, LJ wrote:
>>> int a = 2;
>>> int b = 3;
>>> c = a+++b;
>>> What will be the value of c??
>>> Shouldn't it be undefined depending upon the interpretation??
...
>> c = ((a++) + b);
>>
>> Assuming that c has an arithmetic type, the behavior of that statement
>> is well-defined: 'a' ends up with a value of 3, and c ends up with a
>> value of 5 (converted, if necessary, to whatever the type of c happens
>> to be).
>
> So, c would actually be equal to 6. :)
>
> c = ((a++) + b)
> c = ((2++) + 3)
> c = (3 + 3)
> c = 6
c = ((a++) + b); is equivalent to the following:
{
int temp = a;
a = a + 1;
c = (temp + b);
}
When you fill in the numbers, you'll get c==5.
--
James Kuyper
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confusion about behavior LJ <djtheshowstopper@gmail.com> - 2011-08-14 11:56 -0700
Re: confusion about behavior China Blue Tip Wrench <chine.bleu@yahoo.com> - 2011-08-14 12:05 -0700
Re: confusion about behavior Keith Thompson <kst-u@mib.org> - 2011-08-14 12:06 -0700
Re: confusion about behavior Todd Carnes <toddcarnes@gmail.com> - 2011-08-15 01:57 +0000
Re: confusion about behavior Keith Thompson <kst-u@mib.org> - 2011-08-14 19:10 -0700
Re: confusion about behavior Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-08-15 03:44 +0100
Re: confusion about behavior Keith Thompson <kst-u@mib.org> - 2011-08-14 20:27 -0700
Re: confusion about behavior Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-08-14 22:52 -0400
Re: confusion about behavior Seebs <usenet-nospam@seebs.net> - 2011-08-15 04:28 +0000
Re: confusion about behavior Kenneth Brody <kenbrody@spamcop.net> - 2011-08-15 15:31 -0400
Re: confusion about behavior Keith Thompson <kst-u@mib.org> - 2011-08-15 12:36 -0700
Re: confusion about behavior Seebs <usenet-nospam@seebs.net> - 2011-08-15 20:33 +0000
Re: confusion about behavior Kenneth Brody <kenbrody@spamcop.net> - 2011-08-16 14:39 -0400
Re: confusion about behavior Keith Thompson <kst-u@mib.org> - 2011-08-16 12:27 -0700
Re: confusion about behavior Willem <willem@toad.stack.nl> - 2011-08-16 19:47 +0000
Re: confusion about behavior Barry Schwarz <schwarz45@yahoo.com> - 2011-09-05 04:50 -0700
[OT] Re: confusion about behavior Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-05 09:07 -0400
Re: confusion about behavior Kenneth Brody <kenbrody@spamcop.net> - 2011-09-06 12:42 -0400
Re: confusion about behavior James Kuyper <jameskuyper@verizon.net> - 2011-08-14 15:10 -0400
Re: confusion about behavior Todd Carnes <toddcarnes@gmail.com> - 2011-08-15 02:04 +0000
Re: confusion about behavior Keith Thompson <kst-u@mib.org> - 2011-08-14 19:15 -0700
Re: confusion about behavior Todd Carnes <toddcarnes@gmail.com> - 2011-08-15 02:34 +0000
Re: confusion about behavior James Kuyper <jameskuyper@verizon.net> - 2011-08-14 22:37 -0400
Re: confusion about behavior Todd Carnes <toddcarnes@gmail.com> - 2011-08-15 02:26 +0000
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