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Re: (simple?) problem with multiplication

From Pete Becker <pete@versatilecoding.com>
Organization Roundhouse Consulting, Ltd.
Newsgroups comp.lang.c++
Date 2011-06-22 11:02 -0400
Message-ID <201106221102413141-pete@versatilecodingcom> (permalink)
References <589f8b74-d065-44a5-ab9e-81e6a6fcd88b@v12g2000vby.googlegroups.com> <2011062210102947914-pete@versatilecodingcom> <r6Cdnc4udqZ5ZJzTnZ2dnUVZ8tKdnZ2d@giganews.com> <1eca825a-8d6f-4939-92e3-2f1fcdc553cb@fr19g2000vbb.googlegroups.com> <ir-dnTwS6c81Y5zTnZ2dnUVZ8vednZ2d@giganews.com>
Subject Re: (simple?) problem with multiplication

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On 2011-06-22 10:39:37 -0400, Leigh Johnston said:

> On 22/06/2011 15:33, Dilip wrote:
>> On Jun 22, 10:19 am, Leigh Johnston<le...@i42.co.uk>  wrote:
>>> On 22/06/2011 15:10, Pete Becker wrote:
>>> 
>>>> On 2011-06-22 09:55:49 -0400, gwowen said:
>>> 
>>>>> You know that modulo is distributive over multiplication ...
>>> 
>>>> But it's not. :-(
>>> 
>>>> (5 * 2) % 10 != (5%10) * (2%10)
>>> 
>>> Yes it is:
>>> 
>>> (5 * 2) % 10 == ( (5 % 10) * (2 % 10) ) % 10
>>> 
>>> /Leigh
>> 
>> Huh? For an operation to be called distributive it has to be both left
>> &  right distributive. Obviously modulo over multiplication is not
>> right distributive as Pete Showed.
> 
> I guess, however what I showed is probably what gwowen actually meant.
> 

That's probably true, but it's not what distributive means.

-- 
  Pete
Roundhouse Consulting, Ltd. (www.versatilecoding.com) Author of "The 
Standard C++ Library Extensions: a Tutorial and Reference 
(www.petebecker.com/tr1book)

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(simple?) problem with multiplication Ttodir <sanmrtn96@gmail.com> - 2011-06-21 11:04 -0700
  Re: (simple?) problem with multiplication Ttodir <sanmrtn96@gmail.com> - 2011-06-21 11:11 -0700
  Re: (simple?) problem with multiplication "Balog Pal" <pasa@lib.hu> - 2011-06-21 20:35 +0200
    Re: (simple?) problem with multiplication Anonymous <anonymous@no.net> - 2011-06-21 20:45 +0200
    Re: (simple?) problem with multiplication Pete Becker <pete@versatilecoding.com> - 2011-06-21 14:46 -0400
      Re: (simple?) problem with multiplication Ttodir <sanmrtn96@gmail.com> - 2011-06-21 12:03 -0700
        Re: (simple?) problem with multiplication Gido <gido0001@gmail.com> - 2011-06-21 14:30 -0700
          Re: (simple?) problem with multiplication Anonymous <anonymous@no.net> - 2011-06-21 23:32 +0200
          Re: (simple?) problem with multiplication Juha Nieminen <nospam@thanks.invalid> - 2011-06-23 06:33 +0000
  Re: (simple?) problem with multiplication Pete Becker <pete@versatilecoding.com> - 2011-06-21 14:40 -0400
  Re: (simple?) problem with multiplication Christopher <cpisz@austin.rr.com> - 2011-06-21 11:39 -0700
  Re: (simple?) problem with multiplication Anonymous <anonymous@no.net> - 2011-06-21 23:32 +0200
    Re: (simple?) problem with multiplication Kai-Uwe Bux <jkherciueh@gmx.net> - 2011-06-21 23:41 +0200
  Re: (simple?) problem with multiplication Rune Allnor <allnor@tele.ntnu.no> - 2011-06-21 21:33 -0700
    Re: (simple?) problem with multiplication Ttodir <sanmrtn96@gmail.com> - 2011-06-22 04:59 -0700
  Re: (simple?) problem with multiplication gwowen <gwowen@gmail.com> - 2011-06-22 06:55 -0700
    Re: (simple?) problem with multiplication Pete Becker <pete@versatilecoding.com> - 2011-06-22 10:10 -0400
      Re: (simple?) problem with multiplication Leigh Johnston <leigh@i42.co.uk> - 2011-06-22 15:19 +0100
        Re: (simple?) problem with multiplication Dilip <rdilipk@gmail.com> - 2011-06-22 07:33 -0700
          Re: (simple?) problem with multiplication Leigh Johnston <leigh@i42.co.uk> - 2011-06-22 15:39 +0100
            Re: (simple?) problem with multiplication Pete Becker <pete@versatilecoding.com> - 2011-06-22 11:02 -0400
              Re: (simple?) problem with multiplication "Paul" <pchristor@yahoo.co.uk> - 2011-06-23 23:45 +0100
          Re: (simple?) problem with multiplication gwowen <gwowen@gmail.com> - 2011-06-22 23:59 -0700
      Re: (simple?) problem with multiplication gwowen <gwowen@gmail.com> - 2011-06-22 23:50 -0700
        Re: (simple?) problem with multiplication "Paul" <pchristor@yahoo.co.uk> - 2011-06-23 09:26 +0100
  Re: (simple?) problem with multiplication "Paul" <pchristor@yahoo.co.uk> - 2011-06-22 21:24 +0100
    Re: (simple?) problem with multiplication "Paul" <pchristor@yahoo.co.uk> - 2011-06-24 00:00 +0100
  Re: (simple?) problem with multiplication gwowen <gwowen@gmail.com> - 2011-06-24 01:42 -0700
    Re: (simple?) problem with multiplication "Paul" <pchristor@yahoo.co.uk> - 2011-06-24 10:47 +0100
  Re: (simple?) problem with multiplication SG <s.gesemann@gmail.com> - 2011-06-24 10:09 -0700
    Re: (simple?) problem with multiplication Pete Becker <pete@versatilecoding.com> - 2011-06-24 13:32 -0400
      Re: (simple?) problem with multiplication Kai-Uwe Bux <jkherciueh@gmx.net> - 2011-06-24 20:07 +0200
        Re: (simple?) problem with multiplication Pete Becker <pete@versatilecoding.com> - 2011-06-24 14:14 -0400
          Re: (simple?) problem with multiplication Kai-Uwe Bux <jkherciueh@gmx.net> - 2011-06-24 20:28 +0200
            Re: (simple?) problem with multiplication Pete Becker <pete@versatilecoding.com> - 2011-06-24 16:26 -0400
              Re: (simple?) problem with multiplication "Paul" <pchristor@yahoo.co.uk> - 2011-06-25 03:01 +0100
                Re: (simple?) problem with multiplication "Paul" <pchristor@yahoo.co.uk> - 2011-06-25 18:20 +0100
            Re: (simple?) problem with multiplication "Alf P. Steinbach /Usenet" <alf.p.steinbach+usenet@gmail.com> - 2011-06-25 04:21 +0200
            Re: (simple?) problem with multiplication "Paul" <pchristor@yahoo.co.uk> - 2011-06-25 10:12 +0100
              Re: (simple?) problem with multiplication SG <s.gesemann@gmail.com> - 2011-06-25 02:51 -0700
                Re: (simple?) problem with multiplication "Paul" <pchristor@yahoo.co.uk> - 2011-06-25 11:19 +0100
                Re: (simple?) problem with multiplication "Paul" <pchristor@yahoo.co.uk> - 2011-06-25 11:19 +0100
                Re: (simple?) problem with multiplication Gareth Owen <gwowen@gmail.com> - 2011-06-26 07:59 +0100
                Re: (simple?) problem with multiplication "Paul" <pchristor@yahoo.co.uk> - 2011-06-26 12:34 +0100
          Re: (simple?) problem with multiplication SG <s.gesemann@gmail.com> - 2011-06-25 02:37 -0700
        Re: (simple?) problem with multiplication Gareth Owen <gwowen@gmail.com> - 2011-06-25 08:58 +0100
          Re: (simple?) problem with multiplication "Paul" <pchristor@yahoo.co.uk> - 2011-06-25 10:00 +0100
          Re: (simple?) problem with multiplication Kai-Uwe Bux <jkherciueh@gmx.net> - 2011-06-25 10:29 +0200

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