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Groups > comp.lang.c > #126937

Re: C Construction Problem

From Keith Thompson <kst-u@mib.org>
Newsgroups comp.lang.c
Subject Re: C Construction Problem
Date 2018-02-21 09:43 -0800
Organization None to speak of
Message-ID <ln4lmame6e.fsf@kst-u.example.com> (permalink)
References (1 earlier) <87po4z3dh5.fsf@bsb.me.uk> <p6hi0911a6s@news1.newsguy.com> <87606r3867.fsf@bsb.me.uk> <p6hpgg0f33@news4.newsguy.com> <kfn7er6wcle.fsf@x-alumni2.alumni.caltech.edu>

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Tim Rentsch <txr@alumni.caltech.edu> writes:
[...]
> (1) The code is compiled using gcc in its default mode.  Don't Do
> That.  I recommend 'gcc -std=c99 -pedantic-errors', or similar.
> I recommend against -std=c90 (or the various equivalents to
> that).

Why not -std=c11?

> (2) The code has a dozen or so functions defined with no return
> type.  Don't Do That.  The main() functions should be int main(),
> and there are two help() functions that should be void help().

Better, they should be int main(void) and void help(void),
respectively.  In particular, the latter lets the compiler diagnose
incorrect calls to help() with extra arguments.

[...]

> (8) In a couple of places there were printf() conversions that
> didn't match up with the argument types.  I think all of those
> were the result of trying to print a pointer type as some integer
> type.  I recommend using %p, or perhaps something else if %p
> cannot be used for some reason.

And if you use %p, you should cast the corresponding argument to void*.

[...]

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"

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Thread

C Construction Problem "F. Russell" <fr@random.info> - 2018-02-20 13:51 +0000
  Re: C Construction Problem bartc <bc@freeuk.com> - 2018-02-20 14:42 +0000
    Re: C Construction Problem "F. Russell" <fr@random.info> - 2018-02-20 15:06 +0000
      Re: C Construction Problem Manfred <noname@invalid.add> - 2018-02-20 18:07 +0100
  Re: C Construction Problem Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-02-20 14:54 +0000
  Re: C Construction Problem "James R. Kuyper" <jameskuyper@verizon.net> - 2018-02-20 10:06 -0500
    Re: C Construction Problem "F. Russell" <fr@random.info> - 2018-02-20 16:11 +0000
  Re: C Construction Problem Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-02-20 15:08 +0000
    Re: C Construction Problem "F. Russell" <fr@random.info> - 2018-02-20 16:22 +0000
      Re: C Construction Problem Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-02-20 17:03 +0000
        Re: C Construction Problem Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-02-20 09:23 -0800
        Re: C Construction Problem Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2018-02-20 11:11 -0700
        Re: C Construction Problem "F. Russell" <fr@random.info> - 2018-02-20 18:30 +0000
          Re: C Construction Problem Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-02-20 23:37 +0000
            Re: C Construction Problem "F. Russell" <fr@random.info> - 2018-02-21 00:45 +0000
              Re: C Construction Problem bartc <bc@freeuk.com> - 2018-02-21 01:46 +0000
                Re: C Construction Problem David Brown <david.brown@hesbynett.no> - 2018-02-21 08:49 +0100
                Re: C Construction Problem Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-02-21 09:29 +0000
                [OT] Re: C Construction Problem bartc <bc@freeuk.com> - 2018-02-21 11:24 +0000
                Re: [OT] Re: C Construction Problem Anton Shepelev <anton.txt@g{oogle}mail.com> - 2018-02-21 14:41 +0300
                Re: [OT] Re: C Construction Problem David Brown <david.brown@hesbynett.no> - 2018-02-21 15:10 +0100
                Re: [OT] Re: C Construction Problem Robert Wessel <robertwessel2@yahoo.com> - 2018-02-21 12:36 -0600
                Re: [OT] Re: C Construction Problem bartc <bc@freeuk.com> - 2018-02-21 21:04 +0000
                Re: [OT] Re: C Construction Problem Robert Wessel <robertwessel2@yahoo.com> - 2018-02-21 18:20 -0600
                Re: C Construction Problem Anton Shepelev <anton.txt@g{oogle}mail.com> - 2018-02-21 11:09 +0300
                Re: C Construction Problem Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-02-21 02:29 -0800
                Re: C Construction Problem "F. Russell" <fr@random.info> - 2018-02-21 11:32 +0000
                Re: C Construction Problem Geoff <geoff@invalid.invalid> - 2018-02-26 11:02 -0800
                Re: C Construction Problem David Brown <david.brown@hesbynett.no> - 2018-02-27 09:22 +0100
                Re: C Construction Problem Geoff <geoff@invalid.invalid> - 2018-02-27 11:18 -0800
                Re: C Construction Problem bartc <bc@freeuk.com> - 2018-02-27 19:51 +0000
                Re: C Construction Problem Robert Wessel <robertwessel2@yahoo.com> - 2018-02-28 01:54 -0600
                Re: C Construction Problem Robert Wessel <robertwessel2@yahoo.com> - 2018-02-28 01:43 -0600
                Re: C Construction Problem Geoff <geoff@invalid.invalid> - 2018-02-28 12:54 -0800
                Re: archive decompressor Noob <root@127.0.0.1> - 2018-03-04 12:34 +0100
              Re: C Construction Problem Anton Shepelev <anton.txt@g{oogle}mail.com> - 2018-02-21 11:04 +0300
                Re: C Construction Problem "F. Russell" <fr@random.info> - 2018-02-21 11:27 +0000
                Re: C Construction Problem Anton Shepelev <anton.txt@gmail.com> - 2018-02-28 22:59 +0300
                Re: C Construction Problem supercat@casperkitty.com - 2018-02-21 08:49 -0800
            Re: C Construction Problem Geoff <geoff@invalid.invalid> - 2018-02-26 11:08 -0800
              Re: C Construction Problem "F. Russell" <fr@random.info> - 2018-02-26 23:51 +0000
                Re: C Construction Problem Geoff <geoff@invalid.invalid> - 2018-02-27 11:24 -0800
          Re: C Construction Problem Tim Rentsch <txr@alumni.caltech.edu> - 2018-02-21 08:07 -0800
            Re: C Construction Problem fr314159@gmail.com - 2018-02-21 09:16 -0800
              Re: C Construction Problem Tim Rentsch <txr@alumni.caltech.edu> - 2018-02-21 21:26 -0800
            Re: C Construction Problem Keith Thompson <kst-u@mib.org> - 2018-02-21 09:43 -0800
              Re: C Construction Problem Tim Rentsch <txr@alumni.caltech.edu> - 2018-02-21 22:47 -0800
                Re: C Construction Problem Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-02-22 13:09 +0000
                Re: C Construction Problem Tim Rentsch <txr@alumni.caltech.edu> - 2018-02-24 13:37 -0800
                Re: C Construction Problem Keith Thompson <kst-u@mib.org> - 2018-02-22 10:50 -0800
                Re: C Construction Problem Tim Rentsch <txr@alumni.caltech.edu> - 2018-02-24 13:58 -0800
                Re: C Construction Problem Keith Thompson <kst-u@mib.org> - 2018-02-24 15:05 -0800
                Re: C Construction Problem Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-02-25 03:21 -0800
                Re: C Construction Problem bartc <bc@freeuk.com> - 2018-02-25 11:51 +0000
                Re: C Construction Problem Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-02-25 04:06 -0800
                Re: C Construction Problem bartc <bc@freeuk.com> - 2018-02-25 12:47 +0000
                Re: C Construction Problem "F. Russell" <fr@random.info> - 2018-02-25 13:20 +0000
                Re: C Construction Problem bartc <bc@freeuk.com> - 2018-02-25 17:46 +0000
                Re: C Construction Problem "F. Russell" <fr@random.info> - 2018-02-25 18:58 +0000
                Re: C Construction Problem bartc <bc@freeuk.com> - 2018-02-25 20:01 +0000
                Re: C Construction Problem bartc <bc@freeuk.com> - 2018-02-25 20:25 +0000
                Re: C Construction Problem Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-02-26 02:49 -0800
                Re: C Construction Problem Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-02-25 20:02 +0000
                Re: C Construction Problem Keith Thompson <kst-u@mib.org> - 2018-02-25 15:13 -0800
                Re: C Construction Problem Robert Wessel <robertwessel2@yahoo.com> - 2018-02-25 11:50 -0600
                Re: C Construction Problem Ian Collins <ian-news@hotmail.com> - 2018-02-26 07:38 +1300
                Re: C Construction Problem Keith Thompson <kst-u@mib.org> - 2018-02-25 15:15 -0800
                Re: C Construction Problem Tim Rentsch <txr@alumni.caltech.edu> - 2018-02-26 22:02 -0800
                Re: C Construction Problem jameskuyper@verizon.net - 2018-02-27 06:32 -0800
                Re: C Construction Problem GOTHIER Nathan <nathan.gothier@gmail.com> - 2018-02-27 16:56 +0100
                Re: C Construction Problem jameskuyper@verizon.net - 2018-02-27 08:27 -0800
                Re: C Construction Problem GOTHIER Nathan <nathan.gothier@gmail.com> - 2018-02-27 18:02 +0100
                Re: C Construction Problem jameskuyper@verizon.net - 2018-02-27 10:23 -0800
                Re: C Construction Problem Tim Rentsch <txr@alumni.caltech.edu> - 2018-03-03 01:09 -0800
                Re: C Construction Problem David Brown <david.brown@hesbynett.no> - 2018-02-28 10:37 +0100
                Re: C Construction Problem Tim Rentsch <txr@alumni.caltech.edu> - 2018-03-03 01:29 -0800
                Re: C Construction Problem Steven Petruzzellis <frelwizzen@gmail.com> - 2018-03-03 02:00 -0800
                Re: C Construction Problem Keith Thompson <kst-u@mib.org> - 2018-02-27 08:46 -0800
                Re: C Construction Problem jameskuyper@verizon.net - 2018-02-27 09:15 -0800
                Re: C Construction Problem Tim Rentsch <txr@alumni.caltech.edu> - 2018-03-03 02:08 -0800
                Re: C Construction Problem Steven Petruzzellis <frelwizzen@gmail.com> - 2018-03-03 02:31 -0800
                Re: C Construction Problem Ian Collins <ian-news@hotmail.com> - 2018-03-04 10:34 +1300
                Re: C Construction Problem Tim Rentsch <txr@alumni.caltech.edu> - 2018-03-19 10:27 -0700
                Re: C Construction Problem jameskuyper@verizon.net - 2018-03-03 21:35 -0800
                Re: C Construction Problem Tim Rentsch <txr@alumni.caltech.edu> - 2018-03-17 10:29 -0700
                Re: C Construction Problem Steven Petruzzellis <frelwizzen@gmail.com> - 2018-03-18 08:14 -0700
                Re: C Construction Problem David Brown <david.brown@hesbynett.no> - 2018-02-25 21:49 +0100
                Re: C Construction Problem Keith Thompson <kst-u@mib.org> - 2018-02-25 15:09 -0800
                Re: C Construction Problem gazelle@shell.xmission.com (Kenny McCormack) - 2018-02-26 13:46 +0000
                Re: C Construction Problem David Brown <david.brown@hesbynett.no> - 2018-02-26 14:57 +0100
                Re: C Construction Problem Tim Rentsch <txr@alumni.caltech.edu> - 2018-02-26 22:14 -0800
            Re: C Construction Problem "F. Russell" <fr@random.info> - 2018-02-22 00:11 +0000
              Re: C Construction Problem Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2018-02-21 17:27 -0700
    Re: C Construction Problem Keith Thompson <kst-u@mib.org> - 2018-02-20 09:30 -0800
      Re: C Construction Problem Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-02-21 00:23 +0000
  Re: C Construction Problem Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2018-02-20 09:11 -0700
    Re: C Construction Problem "F. Russell" <fr@random.info> - 2018-02-20 16:38 +0000
      Re: C Construction Problem bartc <bc@freeuk.com> - 2018-02-20 17:07 +0000
      Re: C Construction Problem John Bode <jfbode1029@gmail.com> - 2018-02-20 09:09 -0800
      Re: C Construction Problem "James R. Kuyper" <jameskuyper@verizon.net> - 2018-02-20 12:18 -0500
        Re: C Construction Problem Keith Thompson <kst-u@mib.org> - 2018-02-20 09:38 -0800
      Re: C Construction Problem Joe Pfeiffer <pfeiffer@cs.nmsu.edu> - 2018-02-20 11:08 -0700
      Re: C Construction Problem Gordon Burditt <gordon@hammy.burditt.org> - 2018-02-20 21:47 -0600
        Re: C Construction Problem Keith Thompson <kst-u@mib.org> - 2018-02-21 09:36 -0800
          Re: C Construction Problem Geoff <geoff@invalid.invalid> - 2018-02-26 11:21 -0800

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