From: Andrei Bunghez <andrei.bunghez@gmail.com>
To: Ankit Jain <ankitjain1580@yahoo.com>
Cc: linux prg <linux-c-programming@vger.kernel.org>
Subject: Re: constant in C
Date: Fri, 24 Sep 2004 10:16:32 +0300 [thread overview]
Message-ID: <a7ed6e3304092400165ad53b8c@mail.gmail.com> (raw)
In-Reply-To: <20040924033646.62233.qmail@web52901.mail.yahoo.com>
Hi,
Actually that 'const' has no size at all, it is not a variable, has no
address. The preprocessor replaces const in the source code with
123456789, or whatever its definition is.
For example:
x = const + 3;
will be preprocessed, and the compiler will see:
x = 123456789 + 3;
Therefore you cannot use sizeof(const), &const etc.
Regards,
Andrei
On Fri, 24 Sep 2004 04:36:46 +0100 (BST), Ankit Jain
<ankitjain1580@yahoo.com> wrote:
> what is the size of the constant
>
> i.e #define const 123456789
>
> thanks
>
> ankit
>
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next prev parent reply other threads:[~2004-09-24 7:16 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-24 3:36 constant in C Ankit Jain
2004-09-24 7:16 ` Andrei Bunghez [this message]
[not found] ` <4f2e7cd304092400315c83fd1e@mail.gmail.com>
2004-09-24 7:33 ` Fwd: " Uday Karan
2004-09-24 10:17 ` Micha Feigin
2004-09-24 10:47 ` Ankit Jain
2004-09-25 0:53 ` Micha Feigin
2004-09-24 7:18 ` Andrei Bunghez
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