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Groups > comp.lang.c > #10146

Re: Unexpected output

From Eric Sosman <esosman@ieee-dot-org.invalid>
Newsgroups comp.lang.c
Subject Re: Unexpected output
Date 2011-09-11 17:43 -0400
Organization A noiseless patient Spider
Message-ID <j4ja33$9kk$1@dont-email.me> (permalink)
References <8787e0b5-b4c3-463f-bd9a-6ffc30034950@x29g2000prh.googlegroups.com> <chine.bleu-E38952.12592910092011@news.eternal-september.org> <j4gi57$taa$1@dont-email.me> <03877e30-335e-4348-9207-c9274d1f43e1@j19g2000yqc.googlegroups.com>

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On 9/11/2011 3:08 PM, Paul N wrote:
> On Sep 10, 9:42 pm, Eric Sosman<esos...@ieee-dot-org.invalid>  wrote:
>>       C has two distinct uses for the comma: as an operator, and as
>> a separator.  The comma operator involves a defined order and a
>> sequence point: `f = x,y' means "first evaluate x and ignore the
>> value, sequence point, then evaluate y and yield its value, that
>> value is assigned to f."
>
> Just to be picky, won't that expression actually assign x to f, as the
> = operator has a higher precedence than the , operator? (And yes, I
> know the standard doesn't actually call it precedence.)

     Oops!  Serves me right for editing my example ("for clarity," of
course) after writing it -- and after ceasing to think ...

-- 
Eric Sosman
esosman@ieee-dot-org.invalid

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Thread

Unexpected output Mazen <neurohacks@gmail.com> - 2011-09-10 12:36 -0700
  Re: Unexpected output China Blue Corn Chips <chine.bleu@yahoo.com> - 2011-09-10 12:59 -0700
    Re: Unexpected output Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-10 16:42 -0400
      Re: Unexpected output Mazen <neurohacks@gmail.com> - 2011-09-10 17:51 -0700
        Re: Unexpected output Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-09-10 20:38 -0600
        Re: Unexpected output pete <pfiland@mindspring.com> - 2011-09-10 22:41 -0400
        Re: Unexpected output Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-11 09:35 -0400
          Re: Unexpected output gazelle@shell.xmission.com (Kenny McCormack) - 2011-09-11 13:39 +0000
        Re: Unexpected output "BartC" <bc@freeuk.com> - 2011-09-11 15:26 +0100
      Re: Unexpected output Paul N <gw7rib@aol.com> - 2011-09-11 12:08 -0700
        Re: Unexpected output Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-11 17:43 -0400
    Re: Unexpected output Mazen <neurohacks@gmail.com> - 2011-09-10 13:24 -0700
      Re: Unexpected output China Blue Corn Chips <chine.bleu@yahoo.com> - 2011-09-10 15:02 -0700
    Re: Unexpected output Kenneth Brody <kenbrody@spamcop.net> - 2011-09-12 10:01 -0400
  Re: Unexpected output arni <arnmin@gmail.com> - 2011-09-10 13:31 -0700
    Re: Unexpected output Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-10 16:49 -0400
      Re: Unexpected output arni <arnmin@gmail.com> - 2011-09-10 14:13 -0700
        Re: Unexpected output Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-09-10 17:26 -0400
          Re: Unexpected output Mazen <neurohacks@gmail.com> - 2011-09-10 17:59 -0700
            Re: Unexpected output Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2011-09-10 20:52 -0600
              Re: Unexpected output China Blue Corn Chips <chine.bleu@yahoo.com> - 2011-09-10 19:55 -0700
              Re: Unexpected output Nick Keighley <nick_keighley_nospam@hotmail.com> - 2011-09-11 06:03 -0700
                Re: Unexpected output James Kuyper <jameskuyper@verizon.net> - 2011-09-11 14:04 -0400
            Re: Unexpected output Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-09-11 11:22 +0100
            Re: Unexpected output Keith Thompson <kst-u@mib.org> - 2011-09-11 11:01 -0700
              Re: Unexpected output Phil Carmody <thefatphil_demunged@yahoo.co.uk> - 2011-09-13 14:09 +0300
        Re: Unexpected output Seebs <usenet-nospam@seebs.net> - 2011-09-13 06:44 +0000
    Re: Unexpected output "Morris Keesan" <mkeesan@post.harvard.edu> - 2011-09-10 17:16 -0400
  Re: Unexpected output "BartC" <bc@freeuk.com> - 2011-09-10 23:20 +0100
  Re: Unexpected output August Karlstrom <fusionfile@gmail.com> - 2011-09-11 22:55 +0200
    Re: Unexpected output Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-09-11 22:51 +0100
      Re: Unexpected output pete <pfiland@mindspring.com> - 2011-09-11 22:25 -0400
      Re: Unexpected output August Karlstrom <fusionfile@gmail.com> - 2011-09-12 15:34 +0200
        Re: Unexpected output Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-09-12 19:55 +0100
          Re: Unexpected output August Karlstrom <fusionfile@gmail.com> - 2011-09-13 19:22 +0200

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