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| From | Keith Thompson <kst-u@mib.org> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: EXIT_SUCCESS |
| Date | 2016-07-26 08:24 -0700 |
| Organization | None to speak of |
| Message-ID | <lnh9bcbexi.fsf@kst-u.example.com> (permalink) |
| References | (7 earlier) <return-20160709122630@ram.dialup.fu-berlin.de> <lnh9bymuwq.fsf@kst-u.example.com> <6f1e2608-eac3-49ea-a5f4-0fdc746b2942@googlegroups.com> <lnk2g9d8jy.fsf@kst-u.example.com> <nn7ets$4t6$1@dont-email.me> |
David Brown <david.brown@hesbynett.no> writes:
> On 25/07/16 17:46, Keith Thompson wrote:
>> jgh@mdfs.net writes:
>>> Keith Thompson wrote:
>>>> A better solution is:
>>>> if (a == 0) result = "zero";
>>>> else if (a == 1) result = "one";
>>>> else if (a == 2) result = "two";
>>>> else if (a == 3) result = "three";
>>>> else result = "four";
>>>> return result;
>>>
>>> If you want to do multiple ifs like that, I prefer to do:
>>> result = "four"; // default
>>> if (a == 0) result = "zero";
>>> if (a == 1) result = "one";
>>> if (a == 2) result = "two";
>>> if (a == 3) result = "three";
>>> return result;
>>>
>>> jgh
>>
>> Why do you omit the "else"s?
>
> Presumably the else's were omitted because they are not necessary, and
> perhaps also because in many coding standards they would require
> brackets to added. The else's don't make the code any clearer to the
> reader, and are unlikely to make any difference to a compiler's code
> generation (assuming at least basic optimisation).
They might not be necessary in this particular case, but when I read the
code I have to verify that no more than one of the conditions can be
true. In a more complicated example, that could be difficult.
I doubt that a coding standard would require curly braces with "else"
but not require them without it. And if it did, the answer would be to
add the braces.
(In any case, thanks for your response, but I asked why jgh ommitted the
"else"s.)
>> Of course in this specific case a switch statement would be clearer
>> (and, less importantly, faster), but I presume the example is meant
>> as a more general illustration, covering cases where "switch" would
>> not work.
--
Keith Thompson (The_Other_Keith) kst-u@mib.org <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"
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Re: EXIT_SUCCESS luser droog <luser.droog@gmail.com> - 2016-07-07 19:54 -0700
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Re: EXIT_SUCCESS James Kuyper <jameskuyper@verizon.net> - 2016-07-07 23:20 -0400
Re: EXIT_SUCCESS Richard Heathfield <rjh@cpax.org.uk> - 2016-07-08 10:19 +0100
Re: EXIT_SUCCESS Malcolm McLean <malcolm.mclean5@btinternet.com> - 2016-07-08 03:25 -0700
Re: EXIT_SUCCESS Richard Heathfield <rjh@cpax.org.uk> - 2016-07-08 13:49 +0100
Re: EXIT_SUCCESS Keith Thompson <kst-u@mib.org> - 2016-07-08 08:33 -0700
Re: EXIT_SUCCESS Gareth Owen <gwowen@gmail.com> - 2016-07-08 18:03 +0100
Re: EXIT_SUCCESS Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-08 19:11 +0100
Re: EXIT_SUCCESS "Osmium" <r124c4u102@comcast.net> - 2016-07-08 14:25 -0500
Re: EXIT_SUCCESS Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-08 20:34 +0100
Re: EXIT_SUCCESS Ken Brody <kenbrody@spamcop.net> - 2016-07-11 19:10 -0400
Re: EXIT_SUCCESS Robert Wessel <robertwessel2@yahoo.com> - 2016-07-10 01:21 -0500
Re: EXIT_SUCCESS Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2016-07-10 16:09 -0600
Re: EXIT_SUCCESS Keith Thompson <kst-u@mib.org> - 2016-07-10 16:01 -0700
Re: EXIT_SUCCESS "Osmium" <r124c4u102@comcast.net> - 2016-07-10 18:30 -0500
Re: EXIT_SUCCESS Keith Thompson <kst-u@mib.org> - 2016-07-10 17:00 -0700
Re: EXIT_SUCCESS James Kuyper <jameskuyper@verizon.net> - 2016-07-10 22:43 -0400
Re: EXIT_SUCCESS Siri Cruise <chine.bleu@yahoo.com> - 2016-07-10 22:31 -0700
Re: EXIT_SUCCESS raltbos@xs4all.nl (Richard Bos) - 2016-07-11 08:24 +0000
Re: EXIT_SUCCESS Ken Brody <kenbrody@spamcop.net> - 2016-07-11 19:18 -0400
Re: EXIT_SUCCESS gazelle@shell.xmission.com (Kenny McCormack) - 2016-07-11 00:47 +0000
Re: EXIT_SUCCESS gordonb.0aikd@burditt.org (Gordon Burditt) - 2016-07-12 18:52 -0500
Re: EXIT_SUCCESS "James R. Kuyper" <jameskuyper@verizon.net> - 2016-07-12 20:32 -0400
Re: EXIT_SUCCESS Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2016-07-12 20:59 -0600
Re: EXIT_SUCCESS gordonb.a2m2l@burditt.org (Gordon Burditt) - 2016-07-13 02:11 -0500
Re: EXIT_SUCCESS James Kuyper <jameskuyper@verizon.net> - 2016-07-13 11:26 -0400
Re: EXIT_SUCCESS Keith Thompson <kst-u@mib.org> - 2016-07-13 08:48 -0700
Re: EXIT_SUCCESS Tim Rentsch <txr@alumni.caltech.edu> - 2016-07-18 09:54 -0700
Re: EXIT_SUCCESS James Kuyper <jameskuyper@verizon.net> - 2016-07-08 17:46 -0400
Re: EXIT_SUCCESS Keith Thompson <kst-u@mib.org> - 2016-07-09 13:13 -0700
Re: EXIT_SUCCESS jgh@mdfs.net - 2016-07-25 04:42 -0700
Re: EXIT_SUCCESS Richard Heathfield <rjh@cpax.org.uk> - 2016-07-25 13:07 +0100
Re: EXIT_SUCCESS Udyant Wig <udyant.wig@gmail.com> - 2016-07-25 20:05 +0530
Re: EXIT_SUCCESS raltbos@xs4all.nl (Richard Bos) - 2016-07-25 16:06 +0000
Re: EXIT_SUCCESS Richard Heathfield <rjh@cpax.org.uk> - 2016-07-25 17:41 +0100
Re: EXIT_SUCCESS Keith Thompson <kst-u@mib.org> - 2016-07-25 11:04 -0700
Re: EXIT_SUCCESS Richard Heathfield <rjh@cpax.org.uk> - 2016-07-25 19:14 +0100
Re: EXIT_SUCCESS BartC <bc@freeuk.com> - 2016-07-25 22:00 +0100
Re: EXIT_SUCCESS Richard Heathfield <rjh@cpax.org.uk> - 2016-07-25 22:03 +0100
Re: EXIT_SUCCESS BartC <bc@freeuk.com> - 2016-07-25 22:41 +0100
Re: EXIT_SUCCESS jadill33@gmail.com - 2016-07-25 14:50 -0700
Re: EXIT_SUCCESS Keith Thompson <kst-u@mib.org> - 2016-07-25 15:04 -0700
Re: EXIT_SUCCESS David Brown <david.brown@hesbynett.no> - 2016-07-26 10:43 +0200
Re: EXIT_SUCCESS jadill33@gmail.com - 2016-07-25 14:41 -0700
Re: EXIT_SUCCESS David Brown <david.brown@hesbynett.no> - 2016-07-26 10:59 +0200
Re: EXIT_SUCCESS jadill33@gmail.com - 2016-07-27 06:20 -0700
Re: EXIT_SUCCESS Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-27 15:44 +0100
Re: EXIT_SUCCESS Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-27 16:22 +0100
Re: EXIT_SUCCESS Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2016-07-27 11:20 -0600
Re: EXIT_SUCCESS luser droog <luser.droog@gmail.com> - 2016-07-27 15:32 -0700
Re: EXIT_SUCCESS Ben Bacarisse <ben.usenet@bsb.me.uk> - 2016-07-28 14:47 +0100
Re: EXIT_SUCCESS Keith Thompson <kst-u@mib.org> - 2016-07-25 08:46 -0700
Re: EXIT_SUCCESS David Brown <david.brown@hesbynett.no> - 2016-07-26 12:44 +0200
Re: EXIT_SUCCESS Keith Thompson <kst-u@mib.org> - 2016-07-26 08:24 -0700
Re: EXIT_SUCCESS David Brown <david.brown@hesbynett.no> - 2016-07-26 19:26 +0200
Re: EXIT_SUCCESS BartC <bc@freeuk.com> - 2016-07-26 18:03 +0100
Re: EXIT_SUCCESS Ken Brody <kenbrody@spamcop.net> - 2016-07-11 19:15 -0400
Re: EXIT_SUCCESS supercat@casperkitty.com - 2016-07-11 16:46 -0700
Re: EXIT_SUCCESS raltbos@xs4all.nl (Richard Bos) - 2016-07-15 13:51 +0000
Re: EXIT_SUCCESS supercat@casperkitty.com - 2016-07-15 08:07 -0700
Re: EXIT_SUCCESS Ken Brody <kenbrody@spamcop.net> - 2016-07-15 14:33 -0400
Re: EXIT_SUCCESS raltbos@xs4all.nl (Richard Bos) - 2016-07-23 09:07 +0000
Re: EXIT_SUCCESS Randy Howard <rhoward.mx@EverybodyUsesIt.com> - 2016-07-23 16:44 -0500
Re: EXIT_SUCCESS Ken Brody <kenbrody@spamcop.net> - 2016-07-25 10:36 -0400
Re: EXIT_SUCCESS Randy Howard <rhoward.mx@EverybodyUsesIt.com> - 2016-07-25 15:28 -0500
Re: EXIT_SUCCESS Rosario19 <Ros@invalid.invalid> - 2016-07-18 09:45 +0200
Re: EXIT_SUCCESS gordonb.bitq1@burditt.org (Gordon Burditt) - 2016-07-08 17:56 -0500
Re: EXIT_SUCCESS Keith Thompson <kst-u@mib.org> - 2016-07-08 08:35 -0700
Re: EXIT_SUCCESS luser droog <luser.droog@gmail.com> - 2016-07-31 15:03 -0700
Re: EXIT_SUCCESS Real Troll <real.troll@trolls.com> - 2016-07-31 18:09 -0400
Re: EXIT_SUCCESS luser droog <luser.droog@gmail.com> - 2016-07-31 15:36 -0700
Re: EXIT_SUCCESS James Kuyper <jameskuyper@verizon.net> - 2016-08-01 10:09 -0400
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