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| From | Keith Thompson <kst-u@mib.org> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: dereference |
| Date | 2012-08-20 15:30 -0700 |
| Organization | None to speak of |
| Message-ID | <lnwr0ti4cw.fsf@nuthaus.mib.org> (permalink) |
| References | <k0uc8k$9s4$1@speranza.aioe.org> |
"Bill Cunningham" <nospam@nspam.invalid> writes:
> I believe I have derefencing down now. If I am understanding right it
> has all to do with pointers. The dereference in this code worked but for
> some reason I am getting some big negative value for x before it's
> dereferenced. What's wrong with the pointer here?
No, you clearly don't have dereferencing down now.
> #include <stdio.h>
>
> int main(void)
> {
> int x;
> x = 2;
> int *px = &x;
> printf("%d\n", px);
The problem here is that you're not dereferencing px. Change `px` to
`*px` and it will work.
Did your compiler not warn you about the type mismatch (passing an int*
to printf when it requires an int argument?
> *px = 5;
> printf("%d\n", x);
> return 0;
> }
--
Keith Thompson (The_Other_Keith) kst-u@mib.org <http://www.ghoti.net/~kst>
Will write code for food.
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"
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dereference "Bill Cunningham" <nospam@nspam.invalid> - 2012-08-20 18:04 -0400
Re: dereference Keith Thompson <kst-u@mib.org> - 2012-08-20 15:30 -0700
Re: dereference "Bill Cunningham" <nospam@nspam.invalid> - 2012-08-20 18:37 -0400
Re: dereference Keith Thompson <kst-u@mib.org> - 2012-08-20 18:43 -0700
Re: dereference Kenneth Brody <kenbrody@spamcop.net> - 2012-08-22 14:42 -0400
Re: dereference Keith Thompson <kst-u@mib.org> - 2012-08-22 12:10 -0700
Re: dereference Kenneth Brody <kenbrody@spamcop.net> - 2012-08-22 17:38 -0400
Re: dereference "Bill Cunningham" <nospam@nspam.invalid> - 2012-08-20 21:09 -0400
Re: dereference Keith Thompson <kst-u@mib.org> - 2012-08-20 18:46 -0700
Re: dereference "Bill Cunningham" <nospam@nspam.invalid> - 2012-08-21 16:15 -0400
Re: dereference "Bill Cunningham" <nospam@nspam.invalid> - 2012-08-21 16:26 -0400
Re: dereference Kenneth Brody <kenbrody@spamcop.net> - 2012-08-22 14:49 -0400
Re: dereference "Bill Cunningham" <nospam@nspam.invalid> - 2012-08-22 18:10 -0400
Re: dereference Barry Schwarz <schwarzb@dqel.com> - 2012-08-22 17:36 -0700
Re: dereference "Bill Cunningham" <nospam@nspam.invalid> - 2012-08-22 20:50 -0400
Re: dereference Keith Thompson <kst-u@mib.org> - 2012-08-22 17:54 -0700
Re: dereference "Bill Cunningham" <nospam@nspam.invalid> - 2012-08-22 21:23 -0400
Re: dereference "Bill Cunningham" <nospam@nspam.invalid> - 2012-08-22 21:26 -0400
Re: dereference Kenneth Brody <kenbrody@spamcop.net> - 2012-08-23 12:55 -0400
Re: dereference Mark Bluemel <mark_bluemel@pobox.com> - 2012-08-24 08:05 +0100
Re: dereference Hans Vlems <hvlems@freenet.de> - 2012-08-24 03:00 -0700
Re: dereference Kenneth Brody <kenbrody@spamcop.net> - 2012-08-24 13:31 -0400
Re: dereference "Bill Cunningham" <nospam@nspam.invalid> - 2012-08-24 17:20 -0400
Re: dereference "Bill Cunningham" <nospam@nspam.invalid> - 2012-08-24 19:36 -0400
Re: dereference Adrian Ratnapala <adrian.ratnapala@gmail.com> - 2012-08-24 20:42 -0700
Re: dereference Hans Vlems <hvlems@freenet.de> - 2012-08-27 00:11 -0700
Re: dereference Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-08-27 02:01 -0700
Re: dereference Keith Thompson <kst-u@mib.org> - 2012-08-27 03:24 -0700
Re: dereference Barry Schwarz <schwarzb@dqel.com> - 2012-08-24 21:44 -0700
Re: dereference "Bill Cunningham" <nospam@nspam.invalid> - 2012-08-25 09:46 -0400
Re: dereference Vincenzo Mercuri <vincenzo.mercuri@yahoo.it> - 2012-08-25 16:22 +0200
Re: dereference Vincenzo Mercuri <vincenzo.mercuri@yahoo.it> - 2012-08-25 16:33 +0200
Re: dereference Adrian Ratnapala <adrian.ratnapala@gmail.com> - 2012-08-25 08:07 -0700
Re: dereference Vincenzo Mercuri <vincenzo.mercuri@yahoo.it> - 2012-08-25 17:55 +0200
Re: dereference Adrian Ratnapala <adrian.ratnapala@gmail.com> - 2012-08-25 10:58 -0700
Re: dereference Ike Naar <ike@iceland.freeshell.org> - 2012-08-25 20:39 +0000
Re: dereference Adrian Ratnapala <adrian.ratnapala@gmail.com> - 2012-08-26 14:49 -0700
Re: dereference "Bill Cunningham" <nospam@nspam.invalid> - 2012-08-25 18:36 -0400
Re: dereference Keith Thompson <kst-u@mib.org> - 2012-08-25 16:42 -0700
Re: dereference "Bill Cunningham" <nospam@nspam.invalid> - 2012-08-25 20:19 -0400
Re: dereference Adrian Ratnapala <adrian.ratnapala@gmail.com> - 2012-08-26 14:40 -0700
Re: dereference Adrian Ratnapala <adrian.ratnapala@gmail.com> - 2012-08-26 14:46 -0700
Re: dereference Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-08-27 02:11 -0700
Re: dereference James Kuyper <jameskuyper@verizon.net> - 2012-08-27 08:36 -0400
Re: dereference Adrian Ratnapala <adrian.ratnapala@gmail.com> - 2012-08-27 10:38 -0700
Re: dereference James Kuyper <jameskuyper@verizon.net> - 2012-08-27 13:55 -0400
Re: dereference Adrian Ratnapala <adrian.ratnapala@gmail.com> - 2012-08-27 12:57 -0700
Re: dereference James Kuyper <jameskuyper@verizon.net> - 2012-08-27 16:25 -0400
Re: dereference Kenneth Brody <kenbrody@spamcop.net> - 2012-08-29 10:41 -0400
Re: dereference Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-08-27 02:09 -0700
Re: dereference Barry Schwarz <schwarzb@dqel.com> - 2012-08-25 12:16 -0700
Re: dereference Keith Thompson <kst-u@mib.org> - 2012-08-25 16:40 -0700
Re: dereference "Bill Cunningham" <nospam@nspam.invalid> - 2012-08-25 21:21 -0400
Re: dereference Barry Schwarz <schwarzb@dqel.com> - 2012-08-25 21:48 -0700
Re: dereference Les Cargill <lcargill99@comcast.com> - 2012-08-25 13:08 -0500
Re: dereference Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-08-27 02:02 -0700
Re: dereference Andrew Cooper <amc96@cam.ac.uk> - 2012-08-25 02:53 +0100
Re: dereference Hans Vlems <hvlems@freenet.de> - 2012-08-27 00:10 -0700
Re: dereference Nick Keighley <nick_keighley_nospam@hotmail.com> - 2012-08-27 02:14 -0700
Re: dereference Adrian Ratnapala <adrian.ratnapala@gmail.com> - 2012-08-27 10:34 -0700
Re: dereference Kenneth Brody <kenbrody@spamcop.net> - 2012-08-29 10:22 -0400
Re: dereference Les Cargill <lcargill99@comcast.com> - 2012-08-20 17:38 -0500
Re: dereference "Bill Cunningham" <nospam@nspam.invalid> - 2012-08-20 18:41 -0400
Re: dereference "christian.bau" <christian.bau@cbau.wanadoo.co.uk> - 2012-08-20 16:43 -0700
Re: dereference Mark Bluemel <mark_bluemel@pobox.com> - 2012-08-21 09:22 +0100
Re: dereference "Bill Cunningham" <nospam@nspam.invalid> - 2012-08-21 16:12 -0400
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