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Groups > comp.lang.c > #4098

Re: I need help

From Keith Thompson <kst-u@mib.org>
Newsgroups comp.lang.c
Subject Re: I need help
Date 2011-05-16 11:41 -0700
Organization None to speak of
Message-ID <lnaaemfpyr.fsf@nuthaus.mib.org> (permalink)
References <04ee4fd1-29ef-4640-a906-22055187c1e4@glegroupsg2000goo.googlegroups.com> <iqm0nq$7st$1@dont-email.me> <iqph2n$1vh$1@speranza.aioe.org> <iqpkhl$c51$1@dont-email.me> <iqrqar$f49$1@speranza.aioe.org>

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sandeep <nospam@nospam.com> writes:
[...]
> In C90 there is no ptrdiff_t, so casting to (signed long int) and using %
> ld may be best. I don't know if pointer expressions in C90 are allowed to 
> yield wider types than long int.

Yes, C90 does have ptrdiff_t; see C90 7.1.6.

C90 doesn't have a printf conversion specifier for ptrdiff_t, but
converting to long should be enough; ptrdiff_t is a typedef for a
signed integer type, and C90 has no predefined signed type wider
than long.

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

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Thread

I need help janus <emekamicro@gmail.com> - 2011-05-14 04:05 -0700
  Re: I need help "Heinrich Wolf" <invalid@invalid.invalid> - 2011-05-14 13:30 +0200
    Re: I need help "Joachim Schmitz" <jojo.nospam@schmitz-digital.de> - 2011-05-14 13:46 +0200
      Re: I need help "Heinrich Wolf" <invalid@invalid.invalid> - 2011-05-14 14:20 +0200
    Re: I need help Columbus sailed the ocean China Blue <chine.bleu@yahoo.com> - 2011-05-14 04:48 -0700
  Re: I need help "Joachim Schmitz" <jojo.nospam@schmitz-digital.de> - 2011-05-14 13:39 +0200
    Re: I need help "Joachim Schmitz" <jojo.nospam@schmitz-digital.de> - 2011-05-14 13:44 +0200
    Re: I need help "Heinrich Wolf" <invalid@invalid.invalid> - 2011-05-14 14:23 +0200
      Re: I need help "Joachim Schmitz" <jojo.nospam@schmitz-digital.de> - 2011-05-16 16:47 +0200
    Re: I need help James Kuyper <jameskuyper@verizon.net> - 2011-05-14 09:14 -0400
      Re: I need help "Joachim Schmitz" <jojo.nospam@schmitz-digital.de> - 2011-05-16 16:43 +0200
        Re: I need help Keith Thompson <kst-u@mib.org> - 2011-05-16 08:23 -0700
          Re: I need help Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-05-16 23:00 +0100
            Rationale for Shao Miller <sha0.miller@gmail.com> - 2011-05-16 23:40 -0500
              Re: Rationale for Some of 6.7.3p9? Shao Miller <sha0.miller@gmail.com> - 2011-05-16 23:43 -0500
                Re: Rationale for Some of 6.7.3p9? Heikki Kallasjoki <see@end.of.message.invalid> - 2011-05-17 06:06 +0000
                Re: Rationale for Some of 6.7.3p9? Heikki Kallasjoki <see@end.of.message.invalid> - 2011-05-17 06:13 +0000
                Re: Rationale for Some of 6.7.3p9? Angel <angel+news@spamcop.net> - 2011-05-17 14:03 +0000
                Re: Rationale for Some of 6.7.3p9? Shao Miller <sha0.miller@gmail.com> - 2011-05-17 10:19 -0400
              Re: Rationale for Ike Naar <ike@iceland.freeshell.org> - 2011-05-17 06:09 +0000
                Re: Rationale for Shao Miller <sha0.miller@gmail.com> - 2011-05-17 10:20 -0400
  Re: I need help Columbus sailed the ocean China Blue <chine.bleu@yahoo.com> - 2011-05-14 04:45 -0700
  Re: I need help Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-05-14 09:39 -0400
    Re: I need help sandeep <nospam@nospam.com> - 2011-05-15 21:37 +0000
      Re: I need help Eric Sosman <esosman@ieee-dot-org.invalid> - 2011-05-15 18:35 -0400
        Re: I need help pete <pfiland@mindspring.com> - 2011-05-15 19:45 -0400
          Re: I need help pete <pfiland@mindspring.com> - 2011-05-15 20:15 -0400
        Re: I need help sandeep <nospam@nospam.com> - 2011-05-16 18:27 +0000
          Re: I need help Shao Miller <sha0.miller@gmail.com> - 2011-05-16 14:45 -0400
          Re: I need help Keith Thompson <kst-u@mib.org> - 2011-05-16 11:41 -0700
            Re: I need help Seebs <usenet-nospam@seebs.net> - 2011-05-16 19:12 +0000
              Re: I need help Keith Thompson <kst-u@mib.org> - 2011-05-16 12:30 -0700
                Re: I need help Seebs <usenet-nospam@seebs.net> - 2011-05-16 20:09 +0000
                Re: I need help sandeep <nospam@nospam.com> - 2011-05-16 20:35 +0000
                Re: I need help Ben Bacarisse <ben.usenet@bsb.me.uk> - 2011-05-16 23:22 +0100
                Re: I need help David Thompson <dave.thompson2@verizon.net> - 2011-05-24 01:19 -0400
              Re: I need help Tim Rentsch <txr@alumni.caltech.edu> - 2011-05-19 00:19 -0700
                Re: I need help Seebs <usenet-nospam@seebs.net> - 2011-05-19 14:37 +0000
                Re: I need help Keith Thompson <kst-u@mib.org> - 2011-05-19 08:17 -0700
                Re: I need help Seebs <usenet-nospam@seebs.net> - 2011-05-19 16:08 +0000
                Re: I need help Tim Rentsch <txr@alumni.caltech.edu> - 2011-05-19 11:13 -0700
      Re: I need help Keith Thompson <kst-u@mib.org> - 2011-05-16 08:12 -0700

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