Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
| From | Keith Thompson <kst-u@mib.org> |
|---|---|
| Newsgroups | comp.lang.c |
| Subject | Re: Program to compute elapsed time, learning structures and functions |
| Date | 2015-10-11 14:12 -0700 |
| Organization | None to speak of |
| Message-ID | <lnd1wlcdoq.fsf@kst-u.example.com> (permalink) |
| References | (2 earlier) <d861f166-2cc0-4879-80c3-68bb2759139d@googlegroups.com> <kfn8u7a25d7.fsf@x-alumni2.alumni.caltech.edu> <mvbe1p$3fb$1@dont-email.me> <lnoag6cjd0.fsf@kst-u.example.com> <mvddd5$sjr$1@dont-email.me> |
Bartc <bc@freeuk.com> writes:
> On 11/10/2015 01:57, Keith Thompson wrote:
[..]
>> Or, IMHO more clearly:
>>
>> struct time seconds_to_tims(Seconds seconds) {
>> const struct time T = {
>> .hour = seconds/60/60,
>> .minutes = seconds/60%60,
>> .seconds = seconds%60
>> };
>> return T;
>> }
>
> What's the purpose of the 'const' here? Because I can't see it.
It indicates, both to the compiler and to the reader, that the object
won't be modified after it's been initialized. It's not much of an
advantage with such a small scope, but I prefer to omit "const" only
when an object will actually be modified (except that I don't bother
defining parameters as "const").
[...]
--
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"
Back to comp.lang.c | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Program to compute elapsed time, learning structures and functions Alla _ <modelling.data@gmail.com> - 2015-10-09 02:36 -0700
Re: Program to compute elapsed time, learning structures and functions Bartc <bc@freeuk.com> - 2015-10-09 10:48 +0100
Re: Program to compute elapsed time, learning structures and functions Alla _ <modelling.data@gmail.com> - 2015-10-09 03:06 -0700
Re: Program to compute elapsed time, learning structures and functions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-09 11:01 +0100
Re: Program to compute elapsed time, learning structures and functions Alla _ <modelling.data@gmail.com> - 2015-10-09 03:07 -0700
Re: Program to compute elapsed time, learning structures and functions Richard Heathfield <rjh@cpax.org.uk> - 2015-10-09 13:26 +0100
Re: Program to compute elapsed time, learning structures and functions Alla _ <modelling.data@gmail.com> - 2015-10-09 06:49 -0700
Re: Program to compute elapsed time, learning structures and functions Bartc <bc@freeuk.com> - 2015-10-09 16:20 +0100
Re: Program to compute elapsed time, learning structures and functions Alla _ <modelling.data@gmail.com> - 2015-10-09 09:27 -0700
Re: Program to compute elapsed time, learning structures and functions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-09 19:29 +0100
Re: Program to compute elapsed time, learning structures and functions Keith Thompson <kst-u@mib.org> - 2015-10-09 14:06 -0700
Re: Program to compute elapsed time, learning structures and functions Bartc <bc@freeuk.com> - 2015-10-09 22:24 +0100
Re: Program to compute elapsed time, learning structures and functions Keith Thompson <kst-u@mib.org> - 2015-10-09 15:51 -0700
Re: Program to compute elapsed time, learning structures and functions Richard Heathfield <rjh@cpax.org.uk> - 2015-10-09 18:26 +0100
Re: Program to compute elapsed time, learning structures and functions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-09 19:24 +0100
Re: Program to compute elapsed time, learning structures and functions Richard Heathfield <rjh@cpax.org.uk> - 2015-10-09 19:50 +0100
Re: Program to compute elapsed time, learning structures and functions Eric Sosman <esosman@comcast-dot-net.invalid> - 2015-10-09 15:56 -0400
Re: Program to compute elapsed time, learning structures and functions James Kuyper <jameskuyper@verizon.net> - 2015-10-09 15:31 -0400
Re: Program to compute elapsed time, learning structures and functions Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-10 06:57 -0700
Re: Program to compute elapsed time, learning structures and functions Bartc <bc@freeuk.com> - 2015-10-10 17:25 +0100
Re: Program to compute elapsed time, learning structures and functions Bartc <bc@freeuk.com> - 2015-10-10 19:12 +0100
Re: Program to compute elapsed time, learning structures and functions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-10 20:56 +0100
Re: Program to compute elapsed time, learning structures and functions Bartc <bc@freeuk.com> - 2015-10-10 21:52 +0100
Re: Program to compute elapsed time, learning structures and functions Keith Thompson <kst-u@mib.org> - 2015-10-10 17:57 -0700
Re: Program to compute elapsed time, learning structures and functions raltbos@xs4all.nl (Richard Bos) - 2015-10-11 10:09 +0000
Re: Program to compute elapsed time, learning structures and functions Bartc <bc@freeuk.com> - 2015-10-11 11:26 +0100
Re: Program to compute elapsed time, learning structures and functions Keith Thompson <kst-u@mib.org> - 2015-10-11 14:12 -0700
Re: Program to compute elapsed time, learning structures and functions Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-15 10:51 -0700
Re: Program to compute elapsed time, learning structures and functions Keith Thompson <kst-u@mib.org> - 2015-10-15 11:25 -0700
Re: Program to compute elapsed time, learning structures and functions Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-16 05:34 -0700
Re: Program to compute elapsed time, learning structures and functions Keith Thompson <kst-u@mib.org> - 2015-10-16 08:52 -0700
Re: Program to compute elapsed time, learning structures and functions Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-15 10:46 -0700
Re: Program to compute elapsed time, learning structures and functions Bartc <bc@freeuk.com> - 2015-10-15 19:06 +0100
Re: Program to compute elapsed time, learning structures and functions Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-16 05:24 -0700
Re: Program to compute elapsed time, learning structures and functions glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-17 00:10 +0000
Re: Program to compute elapsed time, learning structures and functions Barry Schwarz <schwarzb@dqel.com> - 2015-10-18 09:52 -0700
Re: Program to compute elapsed time, learning structures and functions Alla _ <modelling.data@gmail.com> - 2015-10-09 06:52 -0700
Re: Program to compute elapsed time, learning structures and functions Barry Schwarz <schwarzb@dqel.com> - 2015-10-18 10:21 -0700
Re: Program to compute elapsed time, learning structures and functions Alla _ <modelling.data@gmail.com> - 2015-11-05 00:56 -0800
Re: Program to compute elapsed time, learning structures and functions Barry Schwarz <schwarzb@dqel.com> - 2015-11-05 01:55 -0800
Re: Program to compute elapsed time, learning structures and functions Alla _ <modelling.data@gmail.com> - 2015-11-05 02:55 -0800
Re: Program to compute elapsed time, learning structures and functions Alla _ <modelling.data@gmail.com> - 2015-11-05 03:01 -0800
Re: Program to compute elapsed time, learning structures and functions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-11-05 03:41 -0800
Re: Program to compute elapsed time, learning structures and functions Alla _ <modelling.data@gmail.com> - 2015-11-05 06:55 -0800
Re: Program to compute elapsed time, learning structures and functions Alla _ <modelling.data@gmail.com> - 2015-11-05 03:03 -0800
Re: Program to compute elapsed time, learning structures and functions Richard Heathfield <rjh@cpax.org.uk> - 2015-11-05 13:27 +0000
Re: Program to compute elapsed time, learning structures and functions Alla _ <modelling.data@gmail.com> - 2015-11-05 06:54 -0800
Re: Program to compute elapsed time, learning structures and functions Keith Thompson <kst-u@mib.org> - 2015-11-05 12:42 -0800
Re: Program to compute elapsed time, learning structures and functions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-11-05 15:50 -0800
csiph-web