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| From | Ian Collins <ian-news@hotmail.com> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Pointers, constant values |
| Date | 2015-10-17 11:27 +1300 |
| Message-ID | <d8dbtoFp0vsU3@mid.individual.net> (permalink) |
| References | <5b2ab074-7644-4798-9b90-a3ae47e1f2b8@googlegroups.com> <ln4mhq7s4z.fsf@kst-u.example.com> <mvr9nb$ra4$1@dont-email.me> |
Bartc wrote: > On 16/10/2015 16:25, Keith Thompson wrote: >> Alla _ <modelling.data@gmail.com> writes: >> [...] >>> int array_sum (int array[], const int n); >> >> One piece of advice: >> >> The parameter declaration >> int array[] >> really means >> int *array >> >> There is no such thing as an array parameter in C, but it uses >> array-like syntax to define pointer variables. >> >> My advice is *not* to take advantage of that special-case rule. It's a >> pointer, so define it as a pointer: >> >> int array_sum (int *array, const int n); > >> Not everyone will agree with this; some will argue that using the [] >> notation is a reminder that it points to an element of an array, not >> just a single int object. > > But 'int *array' *is* a pointer to a single element. C allows you to > pass a pointer to an actual array, if not the array itself: > > int array_sum(int (*array)[], int n); > > However this also now requires proper array dereferencing and indexing, > not just applying an offset to an arbitrary pointer which can be to > anything: > > (*array)[i] Which is something of a mess. You really need references to force correct passing and use of arrays to functions. For example in C++, void f( int (&array)[10] ); can only be passed and array of 10 ints. -- Ian Collins
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Pointers, constant values Alla _ <modelling.data@gmail.com> - 2015-10-16 00:49 -0700
Re: Pointers, constant values Philip Lantz <prl@canterey.us> - 2015-10-16 01:49 -0700
Re: Pointers, constant values James Kuyper <jameskuyper@verizon.net> - 2015-10-16 09:41 -0400
Re: Pointers, constant values supercat@casperkitty.com - 2015-10-16 08:55 -0700
Re: Pointers, constant values Keith Thompson <kst-u@mib.org> - 2015-10-16 08:25 -0700
Re: Pointers, constant values supercat@casperkitty.com - 2015-10-16 09:11 -0700
Re: Pointers, constant values Keith Thompson <kst-u@mib.org> - 2015-10-16 12:06 -0700
Re: Pointers, constant values supercat@casperkitty.com - 2015-10-16 12:55 -0700
Re: Pointers, constant values Bartc <bc@freeuk.com> - 2015-10-16 17:49 +0100
Re: Pointers, constant values Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2015-10-16 13:23 -0400
Re: Pointers, constant values Bartc <bc@freeuk.com> - 2015-10-16 19:34 +0100
Re: Pointers, constant values supercat@casperkitty.com - 2015-10-16 12:05 -0700
Re: Pointers, constant values Keith Thompson <kst-u@mib.org> - 2015-10-16 12:18 -0700
Re: Pointers, constant values Keith Thompson <kst-u@mib.org> - 2015-10-16 12:13 -0700
Re: Pointers, constant values Bartc <bc@freeuk.com> - 2015-10-16 20:33 +0100
Re: Pointers, constant values Keith Thompson <kst-u@mib.org> - 2015-10-16 13:01 -0700
Re: Pointers, constant values Bartc <bc@freeuk.com> - 2015-10-16 21:09 +0100
Re: Pointers, constant values Keith Thompson <kst-u@mib.org> - 2015-10-16 13:41 -0700
Re: Pointers, constant values Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-16 21:07 +0100
Re: Pointers, constant values Bartc <bc@freeuk.com> - 2015-10-16 21:20 +0100
Re: Pointers, constant values Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-16 22:02 +0100
Re: Pointers, constant values Bartc <bc@freeuk.com> - 2015-10-16 22:21 +0100
Re: Pointers, constant values supercat@casperkitty.com - 2015-10-16 14:39 -0700
Re: Pointers, constant values Keith Thompson <kst-u@mib.org> - 2015-10-16 15:26 -0700
Re: Pointers, constant values supercat@casperkitty.com - 2015-10-16 15:44 -0700
Re: Pointers, constant values Keith Thompson <kst-u@mib.org> - 2015-10-16 16:58 -0700
Re: Pointers, constant values supercat@casperkitty.com - 2015-10-16 17:28 -0700
Re: Pointers, constant values Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-16 22:50 +0100
Re: Pointers, constant values supercat@casperkitty.com - 2015-10-16 15:14 -0700
Re: Pointers, constant values Bartc <bc@freeuk.com> - 2015-10-17 01:23 +0100
Re: Pointers, constant values Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-17 19:39 +0100
Re: Pointers, constant values Bartc <bc@freeuk.com> - 2015-10-17 22:42 +0100
Re: Pointers, constant values Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-18 00:31 +0100
Re: Pointers, constant values Bartc <bc@freeuk.com> - 2015-10-18 02:11 +0100
Re: Pointers, constant values Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-18 11:59 +0100
Re: Pointers, constant values Bartc <bc@freeuk.com> - 2015-10-18 12:12 +0100
Re: Pointers, constant values Bartc <bc@freeuk.com> - 2015-10-18 12:28 +0100
Re: Pointers, constant values Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-18 23:16 +0100
Re: Pointers, constant values Bartc <bc@freeuk.com> - 2015-10-18 23:34 +0100
Re: Pointers, constant values Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-19 01:45 +0100
Re: Pointers, constant values Bartc <bc@freeuk.com> - 2015-10-19 11:51 +0100
Re: Pointers, constant values Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-19 12:55 +0100
Re: Pointers, constant values Bartc <bc@freeuk.com> - 2015-10-19 13:51 +0100
Re: Pointers, constant values Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-10-19 06:02 -0700
Re: Pointers, constant values supercat@casperkitty.com - 2015-10-19 07:02 -0700
Re: Pointers, constant values Bartc <bc@freeuk.com> - 2015-10-19 15:39 +0100
Re: Pointers, constant values supercat@casperkitty.com - 2015-10-19 08:54 -0700
Re: Pointers, constant values Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-10-19 09:14 -0700
Re: Pointers, constant values supercat@casperkitty.com - 2015-10-19 10:21 -0700
Re: Pointers, constant values Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-10-19 12:57 -0700
Re: Pointers, constant values glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-19 21:20 +0000
Re: Pointers, constant values supercat@casperkitty.com - 2015-10-20 20:50 -0700
Re: Pointers, constant values glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-21 04:58 +0000
Re: Pointers, constant values Keith Thompson <kst-u@mib.org> - 2015-10-19 08:40 -0700
Re: Pointers, constant values Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-19 20:17 +0100
Re: Pointers, constant values supercat@casperkitty.com - 2015-10-17 16:44 -0700
Re: Pointers, constant values Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-18 11:52 +0100
Re: Pointers, constant values Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-10-18 05:15 -0700
Re: Pointers, constant values Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-18 21:54 +0100
Re: Pointers, constant values Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-10-18 16:09 -0700
Re: Pointers, constant values supercat@casperkitty.com - 2015-10-18 07:55 -0700
Re: Pointers, constant values Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-18 21:47 +0100
Re: Pointers, constant values supercat@casperkitty.com - 2015-10-18 15:37 -0700
Re: Pointers, constant values Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-19 00:10 +0100
Re: Pointers, constant values supercat@casperkitty.com - 2015-10-18 19:04 -0700
Re: Pointers, constant values Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-16 21:13 +0100
Re: Pointers, constant values Ian Collins <ian-news@hotmail.com> - 2015-10-17 11:27 +1300
Re: Pointers, constant values Bartc <bc@freeuk.com> - 2015-10-17 00:56 +0100
Re: Pointers, constant values Les Cargill <lcargill99@comcast.com> - 2015-10-16 12:37 -0500
Re: Pointers, constant values James Kuyper <jameskuyper@verizon.net> - 2015-10-16 14:22 -0400
Re: Pointers, constant values Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-10-16 18:57 +0000
Re: Pointers, constant values Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-16 20:40 +0100
Re: Pointers, constant values Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-10-16 20:46 +0000
Re: Pointers, constant values Keith Thompson <kst-u@mib.org> - 2015-10-16 14:24 -0700
Re: Pointers, constant values Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-10-19 12:43 +0000
Re: Pointers, constant values Siri Cruz <chine.bleu@yahoo.com> - 2015-10-16 13:20 -0700
Re: Pointers, constant values supercat@casperkitty.com - 2015-10-17 13:59 -0700
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