Re: [Solved] Need some help getting to my feet

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From	Keith Thompson <kst-u@mib.org>
Newsgroups	comp.lang.c
Subject	Re: [Solved] Need some help getting to my feet
Date	Fri, 04 May 2018 09:19:46 -0700
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bartc <bc@freeuk.com> writes:
> On 04/05/2018 09:36, Wouter Verhelst wrote:
>> On 28-04-18 01:25, bartc wrote:
>>>>> At most one of these will have the correct arguments, so at least one
>>>>> call must be wrong, but the compiler will say nothing unless you
>>>>> explicitly tell it to report an error.
>>>>
>>>> So don't do that.
>>>
>>> So if someone wants to avoid inadvertently writing dangerous
>>> constructions in a program, all they have to do Not To Write Them.
>>
>> By "that", I assume Keith meant "don't write foo() when you mean foo(void)".

Yes.

>> Once you do that, my gcc starts complaining about your f("one", "two",
>> "three"); as a call with too many arguments.
>
> Yes, but ... suppose someone writes foo() by mistake. How is that
> going to be detected?

It likely won't be detected by the compiler.  gcc doesn't complain
by default, or with a reasonable set of command-line options.
There might be an option that will cause it to warn about it.
(clang, with reasonable options, warns about an incorrect call but
not about the declaration.)

Old-style non-prototype function declarations are still part of the
language, though they're marked as obsolescent.  There is rarely,
if ever, a good reason to use them.  At least some compilers won't
help you detect uses of them.

Yes, this is unfortunate.  I wish they had been removed from the
language in C99 or C11, and I wish gcc could be coaxed to warn
about them.  (There have been discussions about reasons to keep
them in the language; I would prefer not to go over that again here.)

Nevertheless, avoiding old-style function declarations is not that
difficult, and they can be detected by reviewing your code.

This is me, again, agreeing with one of your complaints about C.
As usual, I expect you will refuse to acknowledge this and probably
blame me personally for something I am describing, not defending.

-- 
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"

Thread

Need some help getting to my feet Dan Purgert <dan@djph.net> - 2018-04-24 13:39 +0000
  Re: Need some help getting to my feet Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-04-24 16:38 +0100
    Re: Need some help getting to my feet Real Troll <real.troll@trolls.com> - 2018-04-24 13:40 -0400
  Re: Need some help getting to my feet Tim Rentsch <txr@alumni.caltech.edu> - 2018-04-24 08:38 -0700
    [Solved] Need some help getting to my feet Dan Purgert <dan@djph.net> - 2018-04-24 18:06 +0000
      Re: [Solved] Need some help getting to my feet Tim Rentsch <txr@alumni.caltech.edu> - 2018-04-25 07:33 -0700
        Re: [Solved] Need some help getting to my feet Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-25 07:49 -0700
        Re: [Solved] Need some help getting to my feet Dan Purgert <dan@djph.net> - 2018-04-25 21:28 +0000
          Re: [Solved] Need some help getting to my feet antispam@math.uni.wroc.pl - 2018-04-28 14:26 +0000
            Re: [Solved] Need some help getting to my feet Dan Purgert <dan@djph.net> - 2018-04-28 20:25 +0000
              Re: [Solved] Need some help getting to my feet antispam@math.uni.wroc.pl - 2018-04-29 15:12 +0000
                Re: [Solved] Need some help getting to my feet bartc <bc@freeuk.com> - 2018-04-29 16:49 +0100
                Re: [Solved] Need some help getting to my feet antispam@math.uni.wroc.pl - 2018-04-30 15:30 +0000
                Re: [Solved] Need some help getting to my feet bartc <bc@freeuk.com> - 2018-04-30 17:06 +0100
                Re: [Solved] Need some help getting to my feet Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-30 09:12 -0700
                Re: [Solved] Need some help getting to my feet C W Rose <cwr@seckford.org> - 2018-05-02 15:19 +0100
                Re: [Solved] Need some help getting to my feet Steven Petruzzellis <frelwizzen@gmail.com> - 2018-05-02 07:54 -0700
                Re: [Solved] Need some help getting to my feet Dan Purgert <dan@djph.net> - 2018-05-03 12:45 +0000
                Re: [Solved] Need some help getting to my feet antispam@math.uni.wroc.pl - 2018-05-05 14:22 +0000
                Re: [Solved] Need some help getting to my feet Steve Carroll <frelwizzen@gmail.com> - 2018-05-05 08:42 -0700
                Re: [Solved] Need some help getting to my feet C W Rose <cwr@seckford.org> - 2018-05-07 16:34 +0100
                Re: [Solved] Need some help getting to my feet Steve Carroll <frelwizzen@gmail.com> - 2018-05-07 09:37 -0700
                Re: [Solved] Need some help getting to my feet Wouter Verhelst <w@uter.be> - 2018-05-04 10:19 +0200
                Re: [Solved] Need some help getting to my feet bartc <bc@freeuk.com> - 2018-05-04 11:31 +0100
                Re: [Solved] Need some help getting to my feet Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-29 08:53 -0700
                Re: [Solved] Need some help getting to my feet Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-29 18:14 -0700
      Re: [Solved] Need some help getting to my feet Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-25 08:54 -0700
        Re: [Solved] Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-04-25 09:24 -0700
          Re: [Solved] Need some help getting to my feet bartc <bc@freeuk.com> - 2018-04-25 18:10 +0100
            Re: [Solved] Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-04-25 10:48 -0700
            Casting the return value of malloc() (Was: [Solved] Need some help getting to my feet) gazelle@shell.xmission.com (Kenny McCormack) - 2018-04-25 19:23 +0000
              Re: Casting the return value of malloc() (Was: [Solved] Need some help getting to my feet) Bruce S <bruces42@hotmail.com> - 2018-04-25 16:55 -0600
                Re: Casting the return value of malloc() (Was: [Solved] Need some help getting to my feet) "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-04-25 16:03 -0700
                Re: Casting the return value of malloc() (Was: [Solved] Need some help getting to my feet) Bruce S <bruces42@hotmail.com> - 2018-04-25 18:02 -0600
                Re: Casting the return value of malloc() (Was: [Solved] Need some help getting to my feet) "Chris M. Thomasson" <invalid_chris_thomasson@invalid.invalid> - 2018-04-25 17:14 -0700
                Re: Casting the return value of malloc() (Was: [Solved] Need some help getting to my feet) Bruce S <bruces42@hotmail.com> - 2018-04-26 13:31 -0600
                Re: Casting the return value of malloc() (Was: [Solved] Need some help getting to my feet) gazelle@shell.xmission.com (Kenny McCormack) - 2018-04-26 03:27 +0000
                Re: Casting the return value of malloc() (Was: [Solved] Need some help getting to my feet) Dan Purgert <dan@djph.net> - 2018-04-26 11:06 +0000
          Re: [Solved] Need some help getting to my feet 1alvinalbrecht1@gmail.com - 2018-04-25 18:41 -0700
            Re: [Solved] Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-04-26 07:26 -0700
        Re: [Solved] Need some help getting to my feet Spiros Bousbouras <spibou@gmail.com> - 2018-04-25 16:26 +0000
        Re: [Solved] Need some help getting to my feet Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-04-25 21:50 +0100
          Re: [Solved] Need some help getting to my feet Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-26 01:47 -0700
            Re: [Solved] Need some help getting to my feet Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-26 02:18 -0700
            Re: [Solved] Need some help getting to my feet Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-04-26 11:18 +0100
              Re: [Solved] Need some help getting to my feet bartc <bc@freeuk.com> - 2018-04-26 11:33 +0100
                Re: [Solved] Need some help getting to my feet Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-26 05:26 -0700
                Re: [Solved] Need some help getting to my feet Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-04-27 00:09 +0100
              Re: [Solved] Need some help getting to my feet Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-26 09:14 -0700
                Re: [Solved] Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-04-26 10:26 -0700
                Re: [Solved] Need some help getting to my feet Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-04-27 00:02 +0100
                Re: [Solved] Need some help getting to my feet Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-27 02:35 -0700
                Re: [Solved] Need some help getting to my feet Ben Bacarisse <ben.usenet@bsb.me.uk> - 2018-04-27 11:34 +0100
                Re: [Solved] Need some help getting to my feet mark.bluemel@gmail.com - 2018-04-27 04:14 -0700
                STDIO.H vs stdio.h (Was: [Solved] Need some help getting to my feet) gazelle@shell.xmission.com (Kenny McCormack) - 2018-04-27 13:08 +0000
                Re: STDIO.H vs stdio.h (Was: [Solved] Need some help getting to my feet) Manfred <noname@invalid.add> - 2018-04-27 18:52 +0200
                Re: [Solved] Need some help getting to my feet Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-27 07:08 -0700
                Re: [Solved] Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-04-27 10:36 -0700
                Re: [Solved] Need some help getting to my feet bartc <bc@freeuk.com> - 2018-04-27 19:04 +0100
                Re: [Solved] Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-04-27 11:26 -0700
                Re: [Solved] Need some help getting to my feet scott@slp53.sl.home (Scott Lurndal) - 2018-04-27 18:45 +0000
                Re: [Solved] Need some help getting to my feet Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-04-30 03:43 -0700
                Re: [Solved] Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-04-30 09:10 -0700
                Re: [Solved] Need some help getting to my feet Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-30 23:32 -0700
            Re: [Solved] Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-04-26 07:33 -0700
              Re: [Solved] Need some help getting to my feet jameskuyper@verizon.net - 2018-04-26 08:38 -0700
      Re: [Solved] Need some help getting to my feet already5chosen@yahoo.com - 2018-04-27 03:30 -0700
        Re: [Solved] Need some help getting to my feet Tim Rentsch <txr@alumni.caltech.edu> - 2018-04-27 08:41 -0700
        Re: [Solved] Need some help getting to my feet Dan Purgert <dan@djph.net> - 2018-04-27 17:04 +0000
          Re: [Solved] Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-04-27 11:06 -0700
            Re: [Solved] Need some help getting to my feet Dan Purgert <dan@djph.net> - 2018-04-27 20:15 +0000
              Re: [Solved] Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-04-27 13:47 -0700
                Re: [Solved] Need some help getting to my feet bartc <bc@freeuk.com> - 2018-04-27 22:06 +0100
                Re: [Solved] Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-04-27 14:51 -0700
                Re: [Solved] Need some help getting to my feet bartc <bc@freeuk.com> - 2018-04-28 00:25 +0100
                Re: [Solved] Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-04-27 17:23 -0700
                Re: [Solved] Need some help getting to my feet bartc <bc@freeuk.com> - 2018-04-28 01:39 +0100
                Re: [Solved] Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-04-27 19:22 -0700
                Re: [Solved] Need some help getting to my feet Wouter Verhelst <w@uter.be> - 2018-05-04 10:36 +0200
                Re: [Solved] Need some help getting to my feet bartc <bc@freeuk.com> - 2018-05-04 11:21 +0100
                Re: [Solved] Need some help getting to my feet Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2018-05-04 04:03 -0700
                Re: [Solved] Need some help getting to my feet David Brown <david.brown@hesbynett.no> - 2018-05-04 14:03 +0200
                Re: [Solved] Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-05-04 09:19 -0700
                Re: [Solved] Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-05-04 11:00 -0700
                Re: [Solved] Need some help getting to my feet David Brown <david.brown@hesbynett.no> - 2018-05-05 18:39 +0200
                Re: [Solved] Need some help getting to my feet Steve Carroll <frelwizzen@gmail.com> - 2018-05-07 16:23 -0700
                Re: [Solved] Need some help getting to my feet Dan Purgert <dan@djph.net> - 2018-04-28 12:11 +0000
              Re: [Solved] Need some help getting to my feet luser droog <luser.droog@gmail.com> - 2018-04-27 14:12 -0700
                Re: [Solved] Need some help getting to my feet Dan Purgert <dan@djph.net> - 2018-04-28 12:21 +0000
            Re: [Solved] Need some help getting to my feet Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-05-04 13:31 +0000
              Re: [Solved] Need some help getting to my feet luser droog <luser.droog@gmail.com> - 2018-05-04 17:19 -0700
              Re: [Solved] Need some help getting to my feet Tim Rentsch <txr@alumni.caltech.edu> - 2018-05-18 21:55 -0700
                Re: [Solved] Need some help getting to my feet already5chosen@yahoo.com - 2018-05-21 03:26 -0700
                Re: [Solved] Need some help getting to my feet Tim Rentsch <txr@alumni.caltech.edu> - 2018-06-14 03:00 -0700
                Mixing declarations and statements in C code (Was: [Solved] Need some help getting to my feet) gazelle@shell.xmission.com (Kenny McCormack) - 2018-12-26 06:43 +0000
                Re: [Solved] Need some help getting to my feet Anton Shepelev <anton.txt@g{oogle}mail.com> - 2018-12-26 19:02 +0300
                Re: [Solved] Need some help getting to my feet Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-12-31 18:01 +0000
                Re: [Solved] Need some help getting to my feet Richard Damon <Richard@Damon-Family.org> - 2018-12-31 17:16 -0500
                Re: [Solved] Need some help getting to my feet Bart <bc@freeuk.com> - 2018-12-31 22:44 +0000
                Re: [Solved] Need some help getting to my feet Ike Naar <ike@iceland.freeshell.org> - 2019-01-01 19:14 +0000
                Re: [Solved] Need some help getting to my feet rbowman <bowman@montana.com> - 2019-01-01 13:14 -0700
                Re: [Solved] Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2019-01-01 12:49 -0800
                Re: [Solved] Need some help getting to my feet rbowman <bowman@montana.com> - 2019-01-01 15:55 -0700
                Re: [Solved] Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2019-01-01 16:05 -0800
                Re: [Solved] Need some help getting to my feet rbowman <bowman@montana.com> - 2019-01-01 22:17 -0700
                Re: [Solved] Need some help getting to my feet Bart <bc@freeuk.com> - 2019-01-01 20:25 +0000
          Re: [Solved] Need some help getting to my feet Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-05-04 11:48 +0000
  Re: Need some help getting to my feet Ed Kellett <e@kellett.im> - 2018-04-24 16:40 +0100
    Re: Need some help getting to my feet Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-24 11:01 -0700
  Re: Need some help getting to my feet Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-04-24 15:50 +0000
    Re: Need some help getting to my feet Spiros Bousbouras <spibou@gmail.com> - 2018-04-24 17:21 +0000
  Re: Need some help getting to my feet Real Troll <real.troll@trolls.com> - 2018-04-24 13:20 -0400
    Re: Need some help getting to my feet Real Troll <real.troll@trolls.com> - 2018-04-24 13:30 -0400
  Re: Need some help getting to my feet Spiros Bousbouras <spibou@gmail.com> - 2018-04-24 17:42 +0000
    Re: Need some help getting to my feet Dan Purgert <dan@djph.net> - 2018-04-24 18:26 +0000
      Re: Need some help getting to my feet Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-04-25 19:19 +0000
        Re: Need some help getting to my feet Dan Purgert <dan@djph.net> - 2018-04-25 21:30 +0000
          Re: Need some help getting to my feet bartc <bc@freeuk.com> - 2018-04-25 22:55 +0100
          Re: Need some help getting to my feet Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-04-27 08:49 +0000
    Re: Need some help getting to my feet Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-04-25 15:37 +0000
      Re: Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-04-25 09:27 -0700
        Re: Need some help getting to my feet Wouter Verhelst <w@uter.be> - 2018-04-26 13:22 +0200
          Re: Need some help getting to my feet Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-26 09:21 -0700
          Re: Need some help getting to my feet Jorgen Grahn <grahn+nntp@snipabacken.se> - 2018-04-27 08:16 +0000
            Re: Need some help getting to my feet Tim Rentsch <txr@alumni.caltech.edu> - 2018-04-27 09:36 -0700
              Re: Need some help getting to my feet Wouter Verhelst <w@uter.be> - 2018-05-04 10:41 +0200
      Re: Need some help getting to my feet Spiros Bousbouras <spibou@gmail.com> - 2018-04-28 14:27 +0000
  Re: Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-04-24 11:09 -0700
    Re: Need some help getting to my feet C W Rose <cwr@seckford.org> - 2018-04-25 18:59 +0100
      Re: Need some help getting to my feet Keith Thompson <kst-u@mib.org> - 2018-04-26 10:42 -0700
        Re: Need some help getting to my feet Steven Petruzzellis <frelwizzen@gmail.com> - 2018-04-27 00:23 -0700

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