Re: Problem with the function that should display new letter

From	Bartc <bc@freeuk.com>
Newsgroups	comp.lang.c
Subject	Re: Problem with the function that should display new letter
Date	2015-10-28 11:57 +0000
Organization	A noiseless patient Spider
Message-ID	<n0qd3e$8ca$1@dont-email.me> (permalink)
References	(2 earlier) <d9a7ctFg1b3U1@mid.individual.net> <34ba9d6a-42ad-4d2d-9405-5c46b98369b8@googlegroups.com> <d9bdrlFg1b3U3@mid.individual.net> <n0q8jg$oa6$1@dont-email.me> <87wpu7grkw.fsf@bsb.me.uk>

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On 28/10/2015 11:28, Ben Bacarisse wrote:
> Bartc <bc@freeuk.com> writes:

>> This is one of those cases where an exception can be made. A-Z are
>> commonly numbered 1 to 26 in all sorts of situations. (If you had to
>> tap N times on the metal pipe in your cell to communicate one of A to
>> Z, then 0 taps for A makes that awkward.)
>
> The program is not going to tap anything out.  It's going to do modular
> arithmetic on the result and then index that array again.  Both are
> naturally 0-based operations.
>
>> So a return of i+1 would be simplest (with adjustments in the
>> caller).
>
> How is returning i+1 simpler than returning i?

Is the caller going to check the result? Then it needs to be decided 
whether lookup returns 0 to 25 on success, and -1 etc on failure, or 1 
to 26 on success, and 0 on failure.

In the latter case, returning i+1 is simpler (Another way is to offset 
the array so that 'A' starts at element [1]. Then the need to have A=0 
for the purpose of indexing disappears.)

> Also, the most
> significant adjustment required in the caller will be to subtract the 1
> you are suggesting should be added.  It makes no sense.

It depends on what the caller wants to do. It could also make it easier 
to think about the logic when A is represented by 1, B by 2 etc.

That might be better than having 0 representing A forced on you because 
in one place in the code, it has to do modular arithmetic, which can 
probably be done with an if-statement just as easily.

-- 
Bartc

Thread

Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 09:52 -0700
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 10:06 -0700
    Re: Problem with the function that should display new letter John Gordon <gordon@panix.com> - 2015-10-27 17:16 +0000
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 11:28 -0700
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 10:09 -0700
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 10:12 -0700
    Re: Problem with the function that should display new letter Barry Schwarz <schwarzb@dqel.com> - 2015-10-27 13:12 -0700
      Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-10-27 13:23 -0700
        Re: Problem with the function that should display new letter Keith Thompson <kst-u@mib.org> - 2015-10-27 13:49 -0700
          Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-27 21:27 +0000
            Re: Problem with the function that should display new letter Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2015-10-27 18:00 -0400
            Re: Problem with the function that should display new letter glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-28 02:53 +0000
              Re: Problem with the function that should display new letter Robert Wessel <robertwessel2@yahoo.com> - 2015-10-28 00:43 -0500
              Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 06:08 +0000
                Re: Problem with the function that should display new letter glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-28 08:44 +0000
            Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-28 09:26 +0100
              Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 08:44 +0000
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-28 10:40 +0100
                Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-10-28 06:44 -0700
              Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-10-28 06:35 -0700
  Re: Problem with the function that should display new letter "D. Aaron Sawyer" <aaron@110.net> - 2015-10-27 13:40 -0400
    Re: Problem with the function that should display new letter "D. Aaron Sawyer" <aaron@110.net> - 2015-10-27 13:47 -0400
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 11:38 -0700
        Re: Problem with the function that should display new letter "D. Aaron Sawyer" <aaron@110.net> - 2015-10-27 16:46 -0400
    Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 11:39 -0700
  Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-27 18:20 +0000
    Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 11:36 -0700
    Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 12:09 -0700
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 11:51 -0700
  Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-27 19:25 +0000
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-27 12:27 -0700
    Re: Problem with the function that should display new letter Ian Collins <ian-news@hotmail.com> - 2015-10-28 10:07 +1300
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-28 00:50 -0700
        Re: Problem with the function that should display new letter Ian Collins <ian-news@hotmail.com> - 2015-10-28 21:04 +1300
          Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-28 01:13 -0700
          Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 10:40 +0000
            Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 11:02 +0000
            Re: Problem with the function that should display new letter Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-28 11:28 +0000
              Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 11:57 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 12:53 +0000
                Re: Problem with the function that should display new letter Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-28 13:33 +0000
        Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 08:35 +0000
          Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 10:59 +0000
            Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 11:04 +0000
              Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 11:38 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 11:43 +0000
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 12:10 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 12:58 +0000
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 13:55 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 14:02 +0000
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 15:01 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 15:44 +0000
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 16:22 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 16:26 +0000
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 16:44 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 18:45 +0000
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 19:26 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-28 20:44 +0000
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-28 22:59 +0100
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 22:48 +0000
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-29 01:14 +0100
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-29 01:07 +0000
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-29 14:07 +0100
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-29 13:57 +0000
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-29 16:22 +0100
                Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-10-29 08:38 -0700
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-29 17:25 +0100
                Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-10-29 12:46 -0700
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-30 09:03 +0100
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-29 19:19 +0000
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-30 09:54 +0100
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-30 12:20 +0000
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-29 21:36 +0000
                Re: Problem with the function that should display new letter Ian Collins <ian-news@hotmail.com> - 2015-10-30 10:47 +1300
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-29 22:25 +0000
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-30 09:59 +0100
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-30 10:07 +0100
                Re: Problem with the function that should display new letter David Brown <david.brown@hesbynett.no> - 2015-10-28 16:25 +0100
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-28 16:01 +0000
                Re: Problem with the function that should display new letter Keith Thompson <kst-u@mib.org> - 2015-10-28 09:50 -0700
                Re: Problem with the function that should display new letter glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-10-28 21:57 +0000
                Re: Problem with the function that should display new letter Geoff <geoff@invalid.invalid> - 2015-10-28 18:25 -0700
                Re: Problem with the function that should display new letter Geoff <geoff@invalid.invalid> - 2015-10-28 18:23 -0700
                Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-29 01:44 +0000
            Re: Problem with the function that should display new letter Keith Thompson <kst-u@mib.org> - 2015-10-28 07:07 -0700
          Re: Problem with the function that should display new letter Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-30 07:07 -0700
            Re: Problem with the function that should display new letter Keith Thompson <kst-u@mib.org> - 2015-10-30 09:08 -0700
              Re: Problem with the function that should display new letter Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-30 14:29 -0700
                Re: Problem with the function that should display new letter Keith Thompson <kst-u@mib.org> - 2015-10-30 16:10 -0700
                Re: Problem with the function that should display new letter Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-30 20:27 -0700
                Re: Problem with the function that should display new letter Keith Thompson <kst-u@mib.org> - 2015-10-31 12:40 -0700
                Re: Problem with the function that should display new letter Tim Rentsch <txr@alumni.caltech.edu> - 2015-11-02 02:16 -0800
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 03:36 -0700
    Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 10:46 +0000
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 03:56 -0700
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 04:00 -0700
        Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 11:02 +0000
          Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 04:05 -0700
            Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 11:14 +0000
          Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 04:14 -0700
            Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-29 11:26 +0000
            Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 11:26 +0000
              Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 05:29 -0700
                Re: Problem with the function that should display new letter James Kuyper <jameskuyper@verizon.net> - 2015-10-29 09:23 -0400
                Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 07:44 -0700
                Re: Problem with the function that should display new letter James Kuyper <jameskuyper@verizon.net> - 2015-10-29 11:39 -0400
                Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 09:52 -0700
                Re: Problem with the function that should display new letter Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-29 16:02 +0000
                Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 09:56 -0700
                Re: Problem with the function that should display new letter James Kuyper <jameskuyper@verizon.net> - 2015-10-29 13:41 -0400
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 17:46 +0000
                Re: Problem with the function that should display new letter Udyant Wig <udyantw@gmail.com> - 2015-10-30 00:14 +0530
                Re: Problem with the function that should display new letter raltbos@xs4all.nl (Richard Bos) - 2015-10-29 19:30 +0000
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 22:08 +0000
                Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 22:28 -0700
                Re: Problem with the function that should display new letter Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-30 08:10 -0700
                Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-10-30 08:56 -0700
                Re: Problem with the function that should display new letter Tim Rentsch <txr@alumni.caltech.edu> - 2015-10-30 13:18 -0700
                Re: Problem with the function that should display new letter Ian Collins <ian-news@hotmail.com> - 2015-10-30 09:11 +1300
                Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 01:21 -0700
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 04:04 -0700
        Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 11:11 +0000
          Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 04:19 -0700
            Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 11:24 +0000
              Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 05:26 -0700
                Re: Problem with the function that should display new letter Keith Thompson <kst-u@mib.org> - 2015-10-29 08:31 -0700
            Re: Problem with the function that should display new letter James Kuyper <jameskuyper@verizon.net> - 2015-10-29 09:42 -0400
              Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 08:31 -0700
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-29 10:17 -0700
    Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-29 17:36 +0000
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 01:18 -0700
        Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-30 08:36 +0000
          Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-30 08:38 +0000
          Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 02:26 -0700
            Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-30 09:32 +0000
              Re: Problem with the function that should display new letter Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-30 13:39 +0000
          Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 03:59 -0700
            Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-30 11:18 +0000
              Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 06:24 -0700
                Re: Problem with the function that should display new letter James Kuyper <jameskuyper@verizon.net> - 2015-10-30 14:18 -0400
              Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 06:34 -0700
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-30 13:39 +0000
                Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 06:57 -0700
                Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-11-01 09:06 +0000
            Re: Problem with the function that should display new letter Keith Thompson <kst-u@mib.org> - 2015-10-30 08:49 -0700
              Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 10:18 -0700
    Re: Problem with the function that should display new letter Barry Schwarz <schwarzb@dqel.com> - 2015-10-29 11:48 -0700
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 01:23 -0700
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 01:42 -0700
    Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-30 09:13 +0000
    Re: Problem with the function that should display new letter Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-30 10:17 +0000
      Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-30 10:23 +0000
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 06:39 -0700
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 06:45 -0700
    Re: Problem with the function that should display new letter Richard Heathfield <rjh@cpax.org.uk> - 2015-10-30 13:55 +0000
      Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-30 07:05 -0700
    Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-10-30 23:29 +0000
      Re: Problem with the function that should display new letter Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-31 01:14 +0000
        Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-10-31 17:02 +0000
          Re: Problem with the function that should display new letter Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-10-31 18:05 +0000
            Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-10-31 23:46 +0000
              Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-11-01 08:46 -0800
                Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-11-01 23:43 +0000
                Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-11-01 16:05 -0800
              Re: Problem with the function that should display new letter Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-11-01 21:41 +0000
                Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-11-01 22:46 +0000
          Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-31 18:22 +0000
            Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-10-31 23:57 +0000
        Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-10-31 17:20 +0000
      Re: Problem with the function that should display new letter Bartc <bc@freeuk.com> - 2015-10-31 13:38 +0000
        Re: Problem with the function that should display new letter supercat@casperkitty.com - 2015-10-31 11:28 -0700
          Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-11-01 00:06 +0000
        Re: Problem with the function that should display new letter Steve Thompson <stevet810@gmail.com> - 2015-10-31 17:58 +0000
  Re: Problem with the function that should display new letter Alla _ <modelling.data@gmail.com> - 2015-10-31 01:14 -0700

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