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| From | James Kuyper <jameskuyper@verizon.net> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: a doubt about c |
| Date | 2011-06-11 09:36 -0400 |
| Organization | A noiseless patient Spider |
| Message-ID | <isvr0f$47k$1@dont-email.me> (permalink) |
| References | <7523b6ca-ef28-41c3-99d8-c60273641ddf@glegroupsg2000goo.googlegroups.com> |
On 06/11/2011 09:11 AM, Ya Shou wrote: > Hello, friends. > > I read some open source c program code, found a problem that let me doubt. > All those programs are using macros to define constants, and did not use an enum to achieve, but I think in the enumeration constants is very convenient. > Enumeration defines constants used in c++, but not seen any in c, why? This is mostly a cultural thing; it has little to do with any differences between the way the two languages work. There are definite advantages to using enumeration constants over macros, but most of those advantages apply equally well in both languages. However, those advantages are also relatively minor, which is why it's still commonplace to use macros instead. Enumeration constants have the type of the enumeration in C++, whereas they always have a type of 'int' in C. Because that affects overload resolution and template instantiation, that can be an important difference in C++, whereas if C adopted such a rule, it wouldn't make much difference. -- James Kuyper
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a doubt about c Ya Shou <zxyzxy12321@gmail.com> - 2011-06-11 06:11 -0700
Re: a doubt about c James Kuyper <jameskuyper@verizon.net> - 2011-06-11 09:36 -0400
Re: a doubt about c Angel <angel+news@spamcop.net> - 2011-06-11 14:37 +0000
Re: a doubt about c Keith Thompson <kst-u@mib.org> - 2011-06-11 11:55 -0700
Re: a doubt about c Angel <angel+news@spamcop.net> - 2011-06-11 20:41 +0000
Re: a doubt about c Ian Collins <ian-news@hotmail.com> - 2011-06-12 08:58 +1200
Re: a doubt about c Shao Miller <sha0.miller@gmail.com> - 2011-06-11 17:09 -0500
Re: a doubt about c Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-06-11 18:25 -0400
Re: a doubt about c Ian Collins <ian-news@hotmail.com> - 2011-06-12 11:43 +1200
Re: a doubt about c Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-06-12 05:38 -0700
Re: a doubt about c Roberto Waltman <usenet@rwaltman.com> - 2011-06-12 10:12 -0400
Re: a doubt about c Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-06-12 10:59 -0400
Re: a doubt about c Nobody <nobody@nowhere.com> - 2011-06-15 17:07 +0100
Re: a doubt about c Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-06-12 11:33 -0700
Re: a doubt about c James Kuyper <jameskuyper@verizon.net> - 2011-06-15 09:53 -0400
Re: a doubt about c Dr Nick <3-nospam@temporary-address.org.uk> - 2011-06-16 18:46 +0100
Re: a doubt about c DSF <notavalid@address.here> - 2011-06-11 18:53 -0500
Re: a doubt about c Keith Thompson <kst-u@mib.org> - 2011-06-11 16:18 -0700
Re: a doubt about c Stephen Sprunk <stephen@sprunk.org> - 2011-06-11 21:13 -0500
Re: a doubt about c Ian Collins <ian-news@hotmail.com> - 2011-06-12 14:56 +1200
Re: a doubt about c Keith Thompson <kst-u@mib.org> - 2011-06-11 20:24 -0700
Re: a doubt about c Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-06-12 08:10 -0400
Re: a doubt about c Ian Collins <ian-news@hotmail.com> - 2011-06-12 11:49 +1200
Re: a doubt about c Keith Thompson <kst-u@mib.org> - 2011-06-11 15:36 -0700
Re: a doubt about c Nobody <nobody@nowhere.com> - 2011-06-12 00:23 +0100
Re: a doubt about c Seebs <usenet-nospam@seebs.net> - 2011-06-13 14:39 +0000
Re: a doubt about c Squeamizh <squeamz@hotmail.com> - 2011-06-15 15:44 -0700
Re: a doubt about c Geoff <geoff@invalid.invalid> - 2011-06-15 19:57 -0700
Re: a doubt about c "J. J. Farrell" <jjf@bcs.org.uk> - 2011-06-16 18:39 +0100
Re: a doubt about c Nobody <nobody@nowhere.com> - 2011-06-17 15:39 +0100
Re: a doubt about c Willem <willem@toad.stack.nl> - 2011-06-17 14:49 +0000
Re: a doubt about c Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-06-17 09:14 -0600
Re: a doubt about c Shao Miller <sha0.miller@gmail.com> - 2011-06-17 12:00 -0500
Re: a doubt about c Shao Miller <sha0.miller@gmail.com> - 2011-06-17 11:08 -0500
Re: [OT] Doubt vs. question. (Re: a doubt about c) Shao Miller <sha0.miller@gmail.com> - 2011-06-17 13:00 -0500
Re: [OT] Doubt vs. question. (Re: a doubt about c) Shao Miller <sha0.miller@gmail.com> - 2011-06-22 19:01 -0500
Re: a doubt about c Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-06-17 09:14 -0600
Re: a doubt about c Seebs <usenet-nospam@seebs.net> - 2011-06-17 22:16 +0000
Re: a doubt about c "J. J. Farrell" <jjf@bcs.org.uk> - 2011-06-18 02:24 +0100
Re: a doubt about c Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-06-11 23:09 -0600
[OT] Doubt vs. question. (Re: a doubt about c) Roberto Waltman <usenet@rwaltman.com> - 2011-06-12 10:05 -0400
Re: [OT] Doubt vs. question. (Re: a doubt about c) Keith Thompson <kst-u@mib.org> - 2011-06-12 11:22 -0700
Re: [OT] Doubt vs. question. (Re: a doubt about c) Ben Pfaff <blp@cs.stanford.edu> - 2011-06-12 11:44 -0700
Re: [OT] Doubt vs. question. (Re: a doubt about c) Ralph Spitzner <rasp@spitzner.org> - 2011-06-13 11:31 +0200
Re: [OT] Doubt vs. question. (Re: a doubt about c) James Kuyper <jameskuyper@verizon.net> - 2011-06-15 10:03 -0400
Re: [OT] Doubt vs. question. (Re: a doubt about c) Dr Nick <3-nospam@temporary-address.org.uk> - 2011-06-17 07:52 +0100
Re: [OT] Doubt vs. question. (Re: a doubt about c) Michael Press <rubrum@pacbell.net> - 2011-06-19 00:41 -0700
Re: [OT] Doubt vs. question. (Re: a doubt about c) James Kuyper <jameskuyper@verizon.net> - 2011-06-19 07:04 -0400
Re: [OT] Doubt vs. question. (Re: a doubt about c) Bill Waddington <william.waddington@beezmo.com> - 2011-06-23 11:03 -0700
Re: a doubt about c Shao Miller <sha0.miller@gmail.com> - 2011-06-11 11:23 -0500
Re: a doubt about c pete <pfiland@mindspring.com> - 2011-06-11 13:56 -0400
Re: a doubt about c "dr.oktopus" <blindwilly@freeonline.zzn.com> - 2011-06-11 12:53 -0700
Re: a doubt about c Lew Pitcher <lpitcher@teksavvy.com> - 2011-06-11 16:01 -0400
Re: a doubt about c Keith Thompson <kst-u@mib.org> - 2011-06-11 13:07 -0700
Re: a doubt about c Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-06-11 14:13 -0600
Re: a doubt about c Nobody <nobody@nowhere.com> - 2011-06-11 23:31 +0100
Re: a doubt about c pete <pfiland@mindspring.com> - 2011-06-11 20:07 -0400
Re: a doubt about c Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-06-11 23:05 -0600
Re: a doubt about c Shao Miller <sha0.miller@gmail.com> - 2011-06-11 16:42 -0500
Re: a doubt about c "christian.bau" <christian.bau@cbau.wanadoo.co.uk> - 2011-06-11 14:23 -0700
Re: a doubt about c Shao Miller <sha0.miller@gmail.com> - 2011-06-11 17:27 -0500
Re: a doubt about c Keith Thompson <kst-u@mib.org> - 2011-06-11 15:42 -0700
Re: a doubt about c Seebs <usenet-nospam@seebs.net> - 2011-06-13 14:39 +0000
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