Re: Some ideas about c?

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From	Keith Thompson <kst-u@mib.org>
Newsgroups	comp.lang.c
Subject	Re: Some ideas about c?
Date	Fri, 19 May 2017 12:12:11 -0700
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scott@slp53.sl.home (Scott Lurndal) writes:
> Gareth Owen <gwowen@gmail.com> writes:
>>scott@slp53.sl.home (Scott Lurndal) writes:
>>
>>> Gareth Owen <gwowen@gmail.com> writes:
>>>>scott@slp53.sl.home (Scott Lurndal) writes:
>>>>
>>>>> int main() { char buffer[512]; fputs(fgets(buffer, sizeof(buffer),
>>>>> stdin), stdout); }
>>>>
>>>>Great.  Except it doesn't work if the input line is too big.
>>>
>>> Sure it does.  It just truncates it.  And the programmer is, of
>>> course, aware of that.
>>
>>If I want a program to duplicate the line, and sometimes it truncates it
>>then that program does not work correctly.  For every programming
>>problem there is a solution that is short, elegant and wrong.
>
> The program solves the original assignment:
>
>     Write a program, that reads in a line from the console and then
>     echoes the same line to the console again.
>
> There is nothing there about 'infinite line length' explictly, and
> even the C++ version using getline() can't handle every possible input,
> eventually the std::string will hit a memory limitation.

It fails the original requirements if the line is longer than 512 bytes.
There could be perfectly valid reasons to have input lines longer than
that; perhaps the input was automatically generated, or perhaps your cat
sat on the keyboard.  The C++ version is unlikely to fail for lines that
short.

> I would never write such code for production, but that wasn't the purpose here.

-- 
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

Some ideas about c? Vassilis Spiliopoulos <vassilis@vask1lux.de> - 2017-05-17 23:23 +0300
  Re: Some ideas about c? Ian Collins <ian-news@hotmail.com> - 2017-05-18 08:40 +1200
  Re: Some ideas about c? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-05-17 23:00 +0200
    Re: Some ideas about c? supercat@casperkitty.com - 2017-05-17 14:59 -0700
      Re: Some ideas about c? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-05-18 00:08 +0200
        Re: Some ideas about c? supercat@casperkitty.com - 2017-05-17 22:09 -0700
          Re: Some ideas about c? Ian Collins <ian-news@hotmail.com> - 2017-05-18 18:22 +1200
          Re: Some ideas about c? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-05-18 12:36 +0200
            Re: Some ideas about c? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-05-18 03:53 -0700
              Re: Some ideas about c? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-05-18 14:24 +0200
                Re: Some ideas about c? Jerry Stuckle <jstucklex@attglobal.net> - 2017-05-18 08:37 -0400
                Re: Some ideas about c? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-05-18 05:47 -0700
                Re: Some ideas about c? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-05-18 15:20 +0200
                Re: Some ideas about c? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-05-18 06:28 -0700
                Re: Some ideas about c? scott@slp53.sl.home (Scott Lurndal) - 2017-05-18 13:56 +0000
                Re: Some ideas about c? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-05-18 16:30 +0200
                Re: Some ideas about c? Thiago Adams <thiago.adams@gmail.com> - 2017-05-18 07:45 -0700
                Re: Some ideas about c? Richard Heathfield <rjh@cpax.org.uk> - 2017-05-18 16:08 +0100
                Re: Some ideas about c? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-05-18 08:15 -0700
                Re: Some ideas about c? Jerry Stuckle <jstucklex@attglobal.net> - 2017-05-18 11:46 -0400
                Re: Some ideas about c? Vassilis Spiliopoulos <vassilis@vask1lux.de> - 2017-05-18 21:33 +0300
                Re: Some ideas about c? Jerry Stuckle <jstucklex@attglobal.net> - 2017-05-18 15:29 -0400
                Re: Some ideas about c? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-05-19 01:23 +0200
                Re: Some ideas about c? Thiago Adams <thiago.adams@gmail.com> - 2017-05-18 18:12 -0700
                Re: Some ideas about c? Thiago Adams <thiago.adams@gmail.com> - 2017-05-18 10:08 -0700
                Re: Some ideas about c? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-05-19 00:39 +0200
                Re: Some ideas about c? Vassilis Spiliopoulos <vassilis@vask1lux.de> - 2017-05-19 14:27 +0300
                Re: Some ideas about c? David Brown <david.brown@hesbynett.no> - 2017-05-19 13:41 +0200
                Re: Some ideas about c? Richard Heathfield <rjh@cpax.org.uk> - 2017-05-19 13:04 +0100
                Re: Some ideas about c? Keith Thompson <kst-u@mib.org> - 2017-05-19 10:00 -0700
                Re: Some ideas about c? GOTHIER Nathan <nathan.gothier@gmail.com> - 2017-05-19 14:14 +0200
                Re: Some ideas about c? Jerry Stuckle <jstucklex@attglobal.net> - 2017-05-18 11:33 -0400
                Re: Some ideas about c? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-05-18 08:47 -0700
                Re: Some ideas about c? supercat@casperkitty.com - 2017-05-18 08:48 -0700
                Re: Some ideas about c? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-05-18 09:02 -0700
                Re: Some ideas about c? supercat@casperkitty.com - 2017-05-18 10:52 -0700
                Re: Some ideas about c? Jerry Stuckle <jstucklex@attglobal.net> - 2017-05-18 15:35 -0400
                Re: Some ideas about c? supercat@casperkitty.com - 2017-05-18 14:01 -0700
                Re: Some ideas about c? Jerry Stuckle <jstucklex@attglobal.net> - 2017-05-18 17:38 -0400
                Re: Some ideas about c? supercat@casperkitty.com - 2017-05-18 15:54 -0700
                Re: Some ideas about c? Jerry Stuckle <jstucklex@attglobal.net> - 2017-05-18 22:17 -0400
                Re: Some ideas about c? John Bode <jfbode1029@gmail.com> - 2017-05-18 08:06 -0700
                Re: Some ideas about c? John Bode <jfbode1029@gmail.com> - 2017-05-18 09:17 -0700
  Re: Some ideas about c? fir <profesor.fir@gmail.com> - 2017-05-17 14:34 -0700
    Re: Some ideas about c? Vassilis Spiliopoulos <vassilis@vask1lux.de> - 2017-05-18 16:16 +0300
  Re: Some ideas about c? Cholo Lennon <chololennon@hotmail.com> - 2017-05-18 10:26 -0300
  Re: Some ideas about c? John Bode <jfbode1029@gmail.com> - 2017-05-18 07:36 -0700
    Re: Some ideas about c? scott@slp53.sl.home (Scott Lurndal) - 2017-05-18 18:23 +0000
      Re: Some ideas about c? Gareth Owen <gwowen@gmail.com> - 2017-05-18 21:51 +0100
        Re: Some ideas about c? scott@slp53.sl.home (Scott Lurndal) - 2017-05-19 12:38 +0000
          Re: Some ideas about c? supercat@casperkitty.com - 2017-05-19 07:44 -0700
            Re: Some ideas about c? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-05-19 16:45 +0100
              Re: Some ideas about c? Tim Rentsch <txr@alumni.caltech.edu> - 2017-05-19 21:59 -0700
            Re: Some ideas about c? Keith Thompson <kst-u@mib.org> - 2017-05-19 10:06 -0700
              Re: Some ideas about c? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-05-19 18:18 +0100
                Re: Some ideas about c? Keith Thompson <kst-u@mib.org> - 2017-05-19 11:59 -0700
                Re: Some ideas about c? Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-05-19 21:05 +0100
          Re: Some ideas about c? "James R. Kuyper" <jameskuyper@verizon.net> - 2017-05-19 12:42 -0400
            Re: Some ideas about c? Richard Heathfield <rjh@cpax.org.uk> - 2017-05-19 17:54 +0100
            Re: Some ideas about c? Gareth Owen <gwowen@gmail.com> - 2017-05-19 18:52 +0100
          Re: Some ideas about c? Gareth Owen <gwowen@gmail.com> - 2017-05-19 18:51 +0100
            Re: Some ideas about c? scott@slp53.sl.home (Scott Lurndal) - 2017-05-19 18:55 +0000
              Re: Some ideas about c? Gareth Owen <gwowen@gmail.com> - 2017-05-19 19:58 +0100
              Re: Some ideas about c? Keith Thompson <kst-u@mib.org> - 2017-05-19 12:12 -0700
            Re: Some ideas about c? Keith Thompson <kst-u@mib.org> - 2017-05-19 12:01 -0700
    Re: Some ideas about c? Ian Collins <ian-news@hotmail.com> - 2017-05-19 08:22 +1200
      Re: Some ideas about c? Gareth Owen <gwowen@gmail.com> - 2017-05-18 21:53 +0100
      Re: Some ideas about c? scott@slp53.sl.home (Scott Lurndal) - 2017-05-19 12:36 +0000
        Re: Some ideas about c? Gareth Owen <gwowen@gmail.com> - 2017-05-19 18:54 +0100
          Re: Some ideas about c? scott@slp53.sl.home (Scott Lurndal) - 2017-05-19 18:58 +0000
            Re: Some ideas about c? Keith Thompson <kst-u@mib.org> - 2017-05-19 12:18 -0700

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