Re: Another little puzzle

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From	"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups	comp.programming
Subject	Re: Another little puzzle
Date	Wed, 14 Dec 2022 14:35:19 +0100
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On 2022-12-14 14:10, Richard Heathfield wrote:
> On 14/12/2022 1:06 pm, Dmitry A. Kazakov wrote:
>> On 2022-12-14 13:24, Stefan Ram wrote:
>>>    Given n times of the 24-hour day, print their average.
>>>
>>>    For example, the average of "eight o'clock" and
>>>    "ten o'clock" (n=2) would be "nine o'clock".
>>
>> You probably missed to require the interesting part: doing all that in 
>> the modular type (modulo 24) arithmetic:
>>
>>     20 + 5 = 1 (mod 24)
> 
> ...which will give you the wrong answer. Chase that goose!

Right, you must count the wrap-ups. E.g.

for I in Times'Range loop
    New_Sum := Old_Sum + Times (I);
    if Old_Sum > New_Sum then -- Wrapped
       Count := Count + 1;
       if Count = n then -- Each n wrap-ups can be discarded
          Count := 0;
       end if;
    end if;
    Old_Sum := New_Sum;
end loop;

In the end you have to evaluate

    (Old_Sum + Count * 24) / n  (mod 24)

where Count < n is the wrap-ups count.

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de

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Re: Another little puzzle "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2022-12-14 14:06 +0100
  Re: Another little puzzle Richard Heathfield <rjh@cpax.org.uk> - 2022-12-14 13:10 +0000
    Re: Another little puzzle "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2022-12-14 14:35 +0100
      Re: Another little puzzle Richard Heathfield <rjh@cpax.org.uk> - 2022-12-14 14:10 +0000
        Re: Another little puzzle "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2022-12-14 15:58 +0100
          Re: Another little puzzle Richard Heathfield <rjh@cpax.org.uk> - 2022-12-14 15:18 +0000
            Re: Another little puzzle "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2022-12-14 16:41 +0100
              Re: Another little puzzle "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> - 2022-12-14 16:43 +0100
                Re: Another little puzzle Y A <angel00000100000@mail.ee> - 2023-01-09 16:33 -0800
              Re: Another little puzzle Richard Heathfield <rjh@cpax.org.uk> - 2022-12-14 16:13 +0000
        Re: Another little puzzle V <angleeeeeeee@mail.ee> - 2023-05-10 11:16 -0700
    Re: Another little puzzle Ǝ <angel0000000001000000000000@mail.ee> - 2022-12-30 05:59 -0800

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