Re: Pre And Post Increment Operator Output

From	Keith Thompson <kst-u@mib.org>
Newsgroups	comp.lang.c
Subject	Re: Pre And Post Increment Operator Output
Date	2012-06-21 16:51 -0700
Organization	None to speak of
Message-ID	<lnipek8bri.fsf@nuthaus.mib.org> (permalink)
References	<8404c4f1-a3b7-46b7-ad9c-17de265f9aee@googlegroups.com> <js02hp$jsl$1@dont-email.me> <js03uf$sb3$1@dont-email.me> <js092m$pov$1@dont-email.me>

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"BartC" <bc@freeuk.com> writes:
> "Eric Sosman" <esosman@ieee-dot-org.invalid> wrote in message
> news:js03uf$sb3$1@dont-email.me...
>> On 6/21/2012 5:08 PM, BartC wrote:
>
>>> "Yogesh Yadav Pacheria" <yogeshpacheria@gmail.com> wrote in message
>>> news:8404c4f1-a3b7-46b7-ad9c-17de265f9aee@googlegroups.com...
>
>>>>   int i = 0;
>>>>   i = ++i + ++i + ++i;
>>>>   printf("%d",i);
>
>>>> Output should be 6
>>>>
>>>> But In GCC it's 7
>
>>> I agree it ought to be 6.
>>
>>     Nitwit.
>
> Yet, given the OP's program, and a randomly assigned but unknown compiler,
> what result would you put your money on, if you were obliged to gamble?

Fortunately, we are not obliged to gamble.

> And once you know the result, would you gamble on the same compiler giving 
> the exactly the same answer one more time?

What would be the point?  Don't waste time guessing what the code might
do for a given implementation.  Just fix it.

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
    Will write code for food.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"

Thread

Pre And Post Increment Operator Output Yogesh Yadav Pacheria <yogeshpacheria@gmail.com> - 2012-06-21 12:56 -0700
  Re: Pre And Post Increment Operator Output Paul N <gw7rib@aol.com> - 2012-06-21 13:08 -0700
    Re: Pre And Post Increment Operator Output Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-06-21 16:52 -0400
  Re: Pre And Post Increment Operator Output John Gordon <gordon@panix.com> - 2012-06-21 20:11 +0000
  Re: Pre And Post Increment Operator Output Andrew Cooper <amc96@cam.ac.uk> - 2012-06-21 21:29 +0100
  Re: Pre And Post Increment Operator Output "BartC" <bc@freeuk.com> - 2012-06-21 22:08 +0100
    Re: Pre And Post Increment Operator Output Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-06-21 17:32 -0400
      Re: Pre And Post Increment Operator Output "BartC" <bc@freeuk.com> - 2012-06-22 00:00 +0100
        Re: Pre And Post Increment Operator Output Keith Thompson <kst-u@mib.org> - 2012-06-21 16:51 -0700
          Re: Pre And Post Increment Operator Output "BartC" <bc@freeuk.com> - 2012-06-22 11:09 +0100
            Re: Pre And Post Increment Operator Output nick_keighley_nospam@hotmail.com - 2012-06-22 05:36 -0700
            Re: Pre And Post Increment Operator Output Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-06-22 14:34 +0100
              Re: Pre And Post Increment Operator Output Les Cargill <lcargill99@comcast.com> - 2012-06-22 12:45 -0500
              Re: Pre And Post Increment Operator Output nick_keighley_nospam@hotmail.com - 2012-06-25 00:27 -0700
                Re: Pre And Post Increment Operator Output Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-06-25 14:32 +0100
                Re: Pre And Post Increment Operator Output Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-06-25 09:42 -0400
                Re: Pre And Post Increment Operator Output Kenneth Brody <kenbrody@spamcop.net> - 2012-06-25 11:33 -0400
              Re: Pre And Post Increment Operator Output Richard Damon <news.x.richarddamon@xoxy.net> - 2012-07-04 16:27 -0400
                Re: Pre And Post Increment Operator Output Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-07-04 17:46 -0400
                Re: Pre And Post Increment Operator Output Richard Damon <news.x.richarddamon@xoxy.net> - 2012-07-05 09:08 -0400
                Re: Pre And Post Increment Operator Output "io_x" <a@b.c.invalid> - 2012-07-06 17:34 +0200
            Re: Pre And Post Increment Operator Output Keith Thompson <kst-u@mib.org> - 2012-06-22 12:31 -0700
              Re: Pre And Post Increment Operator Output Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-06-22 16:21 -0400
        Re: Pre And Post Increment Operator Output Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-06-21 21:06 -0400
          Re: Pre And Post Increment Operator Output Noob <root@127.0.0.1> - 2012-06-22 13:30 +0200
            Re: BartC (was: Pre And Post Increment Operator Output) "BartC" <bc@freeuk.com> - 2012-06-22 13:06 +0100
            Re: Pre And Post Increment Operator Output Eric Sosman <esosman@ieee-dot-org.invalid> - 2012-06-22 09:26 -0400
              Re: Pre And Post Increment Operator Output "Bartc" <bc@freeuk.com> - 2012-07-01 16:33 +0100
                Re: Pre And Post Increment Operator Output Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-07-01 17:15 +0100
                Re: Pre And Post Increment Operator Output "Bartc" <bc@freeuk.com> - 2012-07-01 18:45 +0100
                Re: Pre And Post Increment Operator Output Keith Thompson <kst-u@mib.org> - 2012-07-01 13:03 -0700
                Re: Pre And Post Increment Operator Output Ben Bacarisse <ben.usenet@bsb.me.uk> - 2012-07-02 00:18 +0100
        Re: Pre And Post Increment Operator Output Phil Carmody <thefatphil_demunged@yahoo.co.uk> - 2012-06-24 23:45 +0300
      Re: Pre And Post Increment Operator Output Tim Rentsch <txr@alumni.caltech.edu> - 2012-06-24 09:15 -0700
        Re: Pre And Post Increment Operator Output Phil Carmody <thefatphil_demunged@yahoo.co.uk> - 2012-06-24 23:54 +0300
          Re: Pre And Post Increment Operator Output Tim Rentsch <txr@alumni.caltech.edu> - 2012-06-24 15:12 -0700
            Re: Pre And Post Increment Operator Output "BartC" <bc@freeuk.com> - 2012-06-25 11:00 +0100
              Re: Pre And Post Increment Operator Output Tim Rentsch <txr@alumni.caltech.edu> - 2012-06-25 13:53 -0700
  Re: Pre And Post Increment Operator Output Keith Thompson <kst-u@mib.org> - 2012-06-21 15:17 -0700
  Re: Pre And Post Increment Operator Output Yogesh Yadav Pacheria <yogeshpacheria@gmail.com> - 2012-06-21 21:03 -0700
    Re: Pre And Post Increment Operator Output nick_keighley_nospam@hotmail.com - 2012-06-22 00:06 -0700
    Re: Pre And Post Increment Operator Output Mark Bluemel <mark_bluemel@pobox.com> - 2012-06-22 08:30 +0100
    Re: Pre And Post Increment Operator Output John Bode <jfbode1029@gmail.com> - 2012-06-22 09:18 -0700
      Re: Pre And Post Increment Operator Output Keith Thompson <kst-u@mib.org> - 2012-06-22 12:36 -0700
      Re: Pre And Post Increment Operator Output lawrence.jones@siemens.com - 2012-06-22 14:25 -0400
  Re: Pre And Post Increment Operator Output "Heinrich Wolf" <invalid@invalid.invalid> - 2012-06-22 10:27 +0200
    Re: Pre And Post Increment Operator Output Kenneth Brody <kenbrody@spamcop.net> - 2012-06-22 13:46 -0400
      Re: Pre And Post Increment Operator Output Michael Press <rubrum@pacbell.net> - 2012-07-13 02:09 -0700
  Re: Pre And Post Increment Operator Output Ian Collins <ian-news@hotmail.com> - 2012-06-22 23:11 +1200
    Re: Pre And Post Increment Operator Output Mark Bluemel <mark_bluemel@pobox.com> - 2012-06-22 12:18 +0100

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