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| From | jt@toerring.de (Jens Thoms Toerring) |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: addresses of variables |
| Date | 2012-03-18 11:18 +0000 |
| Organization | Freie Universitaet Berlin |
| Message-ID | <9slukoF5c2U1@mid.uni-berlin.de> (permalink) |
| References | <9524023.127.1332068169176.JavaMail.geo-discussion-forums@ynbq18> |
Zero <chefmuetze@web.de> wrote:
> does the ansi standard define
> at what addresses variables will be found or is this dependent on each compiler,
> I wonder, e.g.
> when I have this code
> main()
> {
> int a, b, c, d;
> char e;
> }
> whether those local variables are placed one after the other in memory (e.g. 0x100, 0x104, 0x108, 0x10C and 0x10D or
> whether the can be aligned at different addresses 0x200, 0x100, 0x300...
> Does the standard define those things...
No, that's all up for the compiler to decide on its own. And the
variables don't even need to have addresses: unless you take the
address of a variable somewhere the compiler can very well "op-
timize out" a variable by keeping its value in a CPU register
or, if it finds it's not really needed, throw it out completely.
Regards, Jens
--
\ Jens Thoms Toerring ___ jt@toerring.de
\__________________________ http://toerring.de
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addresses of variables Zero <chefmuetze@web.de> - 2012-03-18 03:56 -0700
Re: addresses of variables "BartC" <bc@freeuk.com> - 2012-03-18 11:18 +0000
Re: addresses of variables jt@toerring.de (Jens Thoms Toerring) - 2012-03-18 11:18 +0000
Re: addresses of variables pete <pfiland@mindspring.com> - 2012-03-18 07:30 -0500
Re: addresses of variables Zero <chefmuetze@web.de> - 2012-03-18 04:42 -0700
Re: addresses of variables Lowell Gilbert <lgusenet@be-well.ilk.org> - 2012-03-19 10:52 -0400
Re: addresses of variables Stephen Sprunk <stephen@sprunk.org> - 2012-03-19 12:55 -0500
Re: addresses of variables James Kuyper <jameskuyper@verizon.net> - 2012-03-19 14:30 -0400
Re: addresses of variables jacob navia <jacob@spamsink.net> - 2012-03-19 20:11 +0100
Re: addresses of variables hoganlong@gmail.com - 2012-03-19 12:17 -0700
Re: addresses of variables James Kuyper <jameskuyper@verizon.net> - 2012-03-19 16:15 -0400
Re: addresses of variables hoganlong@gmail.com - 2012-03-19 14:18 -0700
Re: addresses of variables "io_x" <a@b.c.invalid> - 2012-03-19 23:26 +0100
Re: addresses of variables Stephen Sprunk <stephen@sprunk.org> - 2012-03-20 03:52 -0500
Re: addresses of variables James Kuyper <jameskuyper@verizon.net> - 2012-03-20 06:00 -0400
Re: addresses of variables Stephen Sprunk <stephen@sprunk.org> - 2012-03-20 16:47 -0500
Re: addresses of variables James Kuyper <jameskuyper@verizon.net> - 2012-03-20 18:37 -0400
Re: addresses of variables Stephen Sprunk <stephen@sprunk.org> - 2012-03-21 17:58 -0500
Re: addresses of variables James Kuyper <jameskuyper@verizon.net> - 2012-03-21 20:24 -0400
Re: addresses of variables Stephen Sprunk <stephen@sprunk.org> - 2012-03-21 23:53 -0500
Re: addresses of variables James Kuyper <jameskuyper@verizon.net> - 2012-03-22 06:22 -0400
Re: addresses of variables Kenneth Brody <kenbrody@spamcop.net> - 2012-03-22 12:01 -0400
Re: addresses of variables Stephen Sprunk <stephen@sprunk.org> - 2012-03-24 16:09 -0500
Re: addresses of variables Jens Gustedt <jens.gustedt@loria.fr> - 2012-03-23 13:41 +0100
Re: addresses of variables James Kuyper <jameskuyper@verizon.net> - 2012-03-23 09:06 -0400
Re: addresses of variables Jens Gustedt <jens.gustedt@loria.fr> - 2012-03-23 19:47 +0100
Re: addresses of variables James Kuyper <jameskuyper@verizon.net> - 2012-03-23 16:04 -0400
Re: addresses of variables Jens Gustedt <jens.gustedt@loria.fr> - 2012-03-24 00:19 +0100
Re: addresses of variables James Kuyper <jameskuyper@verizon.net> - 2012-03-23 22:20 -0400
Re: addresses of variables Jens Gustedt <jens.gustedt@loria.fr> - 2012-03-24 09:39 +0100
Re: addresses of variables Anders Wegge Keller <wegge@wegge.dk> - 2012-03-20 20:02 +0100
Re: addresses of variables James Kuyper <jameskuyper@verizon.net> - 2012-03-20 15:18 -0400
Re: addresses of variables Anders Wegge Keller <wegge@wegge.dk> - 2012-03-21 21:37 +0100
Re: addresses of variables Lowell Gilbert <lgusenet@be-well.ilk.org> - 2012-03-20 11:52 -0400
Re: addresses of variables Kenneth Brody <kenbrody@spamcop.net> - 2012-03-21 11:04 -0400
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