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Re: strtoll discussion

From glen herrmannsfeldt <gah@ugcs.caltech.edu>
Newsgroups comp.lang.c
Subject Re: strtoll discussion
Date 2015-04-03 20:41 +0000
Organization Aioe.org NNTP Server
Message-ID <mfmtst$1e0$1@speranza.aioe.org> (permalink)
References <mfm0uu$i18$1@dont-email.me> <551EE8B7.4020106@verizon.net> <mfmr6o$qbj$1@dont-email.me>

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Richard Heathfield <rjh@cpax.org.uk> wrote:

(snip)

> A couple of points here. Firstly, I think Jacob Navia regards strtoll() 
> as a way to /input/ numeric representations in arbitrary bases - get the 
> input via a string, and convert it into an integer type. The 
> corresponding output functions would be ltostr, lltostr... which the C 
> Standard does not specify. Nor does it provide... okay, with the caveat 
> that I haven't read the Standard for at least twenty minutes, but if it 
> hasn't changed yet again under my feet, then it does not provide format 
> specifiers to allow *printf to write out numeric representations in an 
> arbitrary base.
 
> Secondly, I chose my words very carefully in that paragraph. What strtol 
> and strtoll read is not numbers with an arbitrary base, but numeric 
> representations in an arbitrary base. Numbers do not have bases. A 
> number is the same number no matter how you represent it. The following:

Seems to me that sometimes the distinction is important and sometimes
not so important.

If I say X'3F' is a hexadecimal number, it is pretty obvious, even
though it is the hexadecimal representation of an abstract
mathematical integer value.

But on pi day (March 14th) I wasn't celebrating. It is a strange
connection between the decimal representation of the numerical
value and the unexplainable representation of dates on the
calendar.  (e day is on February 71st.) 

Seems to me that some years ago number bases were taught in 
elementary school as part of "new math", but that has faded.
People are expected to know that computers use binary (even
when they don't) but not actually understand binary, or any
base other than ten.

-- glen

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Thread

strtoll discussion jacobnavia <jacob@jacob.remcomp.fr> - 2015-04-03 14:28 +0200
  Re: strtoll discussion Richard Heathfield <rjh@cpax.org.uk> - 2015-04-03 14:46 +0100
  Re: strtoll discussion Keith Thompson <kst-u@mib.org> - 2015-04-03 11:08 -0700
  Re: strtoll discussion James Kuyper <jameskuyper@verizon.net> - 2015-04-03 15:23 -0400
    Re: strtoll discussion Richard Heathfield <rjh@cpax.org.uk> - 2015-04-03 20:55 +0100
      Re: strtoll discussion glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-04-03 20:41 +0000
        Re: strtoll discussion Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-03 13:52 -0700
          Re: strtoll discussion Richard Heathfield <rjh@cpax.org.uk> - 2015-04-03 22:25 +0100
            Re: strtoll discussion Bartc <bc@freeuk.com> - 2015-04-04 00:17 +0100
              Re: strtoll discussion Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-03 16:27 -0700
            Re: strtoll discussion Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-04 02:07 +0100
              Re: strtoll discussion Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-04 03:44 -0700
                Re: strtoll discussion Richard Heathfield <rjh@cpax.org.uk> - 2015-04-04 12:13 +0100
    Re: strtoll discussion James Kuyper <jameskuyper@verizon.net> - 2015-04-03 16:11 -0400
    Re: strtoll discussion Keith Thompson <kst-u@mib.org> - 2015-04-03 14:12 -0700
    Re: strtoll discussion jacobnavia <jacob@jacob.remcomp.fr> - 2015-04-03 23:56 +0200
  Re: strtoll discussion Ian Collins <ian-news@hotmail.com> - 2015-04-04 08:41 +1300
    Re: strtoll discussion jacobnavia <jacob@jacob.remcomp.fr> - 2015-04-03 23:33 +0200
  Re: strtoll discussion James Lothian <james@firstnamelastname.freeserve.co.uk> - 2015-04-03 20:51 +0100
    Re: strtoll discussion asetofsymbols@gmail.com - 2015-04-03 13:09 -0700
      Re: strtoll discussion asetofsymbols@gmail.com - 2015-04-03 13:16 -0700
      Re: strtoll discussion Richard Heathfield <rjh@cpax.org.uk> - 2015-04-03 21:19 +0100
        Re: strtoll discussion asetofsymbols@gmail.com - 2015-04-03 13:28 -0700
          Re: strtoll discussion Richard Heathfield <rjh@cpax.org.uk> - 2015-04-03 22:29 +0100
          Re: strtoll discussion jacobnavia <jacob@jacob.remcomp.fr> - 2015-04-03 23:33 +0200
      Re: strtoll discussion jacobnavia <jacob@jacob.remcomp.fr> - 2015-04-03 23:34 +0200
        Re: strtoll discussion Richard Heathfield <rjh@cpax.org.uk> - 2015-04-03 22:42 +0100
          Re: strtoll discussion Keith Thompson <kst-u@mib.org> - 2015-04-03 15:08 -0700
          Re: strtoll discussion jacobnavia <jacob@jacob.remcomp.fr> - 2015-04-04 00:13 +0200
            Re: strtoll discussion Richard Heathfield <rjh@cpax.org.uk> - 2015-04-03 23:44 +0100
              Re: strtoll discussion jacobnavia <jacob@jacob.remcomp.fr> - 2015-04-04 00:48 +0200
                Re: strtoll discussion Richard Heathfield <rjh@cpax.org.uk> - 2015-04-04 00:03 +0100
                Re: strtoll discussion Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2015-04-03 19:31 -0400
                Re: strtoll discussion Richard Heathfield <rjh@cpax.org.uk> - 2015-04-04 00:37 +0100
                Re: strtoll discussion Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2015-04-04 10:29 -0400
                Re: strtoll discussion Richard Heathfield <rjh@cpax.org.uk> - 2015-04-04 15:54 +0100
                Re: strtoll discussion Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-04 08:07 -0700
                Re: strtoll discussion Bartc <bc@freeuk.com> - 2015-04-04 16:28 +0100
                Re: strtoll discussion Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-04 08:57 -0700
                Re: strtoll discussion Bartc <bc@freeuk.com> - 2015-04-04 17:03 +0100
                Re: strtoll discussion Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-04 09:44 -0700
                Re: strtoll discussion Richard Heathfield <rjh@cpax.org.uk> - 2015-04-04 18:05 +0100
                Re: strtoll discussion Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-04 23:32 -0700
                Re: strtoll discussion Richard Heathfield <rjh@cpax.org.uk> - 2015-04-05 11:00 +0100
                Re: strtoll discussion Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-05 13:18 -0700
                Re: strtoll discussion Richard Damon <Richard@Damon-Family.org> - 2015-04-05 17:37 -0400
                Re: strtoll discussion Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-04-05 15:00 -0700
                Re: strtoll discussion Robert Wessel <robertwessel2@yahoo.com> - 2015-04-05 22:17 -0500
                Re: strtoll discussion Richard Damon <Richard@Damon-Family.org> - 2015-04-04 18:54 -0400
                Re: strtoll discussion Bartc <bc@freeuk.com> - 2015-04-05 12:14 +0100
                Re: strtoll discussion glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-04-04 00:19 +0000
                Re: strtoll discussion Keith Thompson <kst-u@mib.org> - 2015-04-03 17:48 -0700
                Re: strtoll discussion James Kuyper <jameskuyper@verizon.net> - 2015-04-08 11:23 -0400
                Re: strtoll discussion jacobnavia <jacob@jacob.remcomp.fr> - 2015-04-08 19:35 +0200
                Re: strtoll discussion Keith Thompson <kst-u@mib.org> - 2015-04-08 10:47 -0700
                Re: strtoll discussion James Kuyper <jameskuyper@verizon.net> - 2015-04-08 14:22 -0400
  lltostr/ulltostr jacobnavia <jacob@jacob.remcomp.fr> - 2015-04-04 13:56 +0200
    Re: lltostr/ulltostr Richard Heathfield <rjh@cpax.org.uk> - 2015-04-04 13:36 +0100
    Re: lltostr/ulltostr Barry Schwarz <schwarzb@dqel.com> - 2015-04-04 18:54 -0700
      Re: lltostr/ulltostr Ian Collins <ian-news@hotmail.com> - 2015-04-05 14:29 +1200
    Re: lltostr/ulltostr Ralf Damaschke <rwspam@gmx.de> - 2015-04-05 16:58 +0000
      Re: lltostr/ulltostr jacobnavia <jacob@jacob.remcomp.fr> - 2015-04-05 20:39 +0200
        Re: lltostr/ulltostr glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-04-05 20:19 +0000
      Re: lltostr/ulltostr Keith Thompson <kst-u@mib.org> - 2015-04-05 13:18 -0700
        Re: lltostr/ulltostr Ralf Damaschke <rwspam@gmx.de> - 2015-04-06 14:28 +0000
          Re: lltostr/ulltostr Keith Thompson <kst-u@mib.org> - 2015-04-06 08:40 -0700
  Re: strtoll discussion Tim Rentsch <txr@alumni.caltech.edu> - 2015-04-04 13:04 -0700
    Re: strtoll discussion jacobnavia <jacob@jacob.remcomp.fr> - 2015-04-04 22:52 +0200
      Re: strtoll discussion Richard Heathfield <rjh@cpax.org.uk> - 2015-04-04 22:14 +0100
      Re: strtoll discussion Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-04-05 00:24 +0100
      Re: strtoll discussion Geoff <geoff@invalid.invalid> - 2015-04-04 16:51 -0700
      Re: strtoll discussion jacobnavia <jacob@jacob.remcomp.fr> - 2015-04-05 23:32 +0200
        Re: strtoll discussion Tim Rentsch <txr@alumni.caltech.edu> - 2015-04-16 09:21 -0700
      Re: strtoll discussion Tim Rentsch <txr@alumni.caltech.edu> - 2015-04-17 02:21 -0700
    Re: strtoll discussion Keith Thompson <kst-u@mib.org> - 2015-04-04 15:36 -0700
      Re: strtoll discussion Tim Rentsch <txr@alumni.caltech.edu> - 2015-04-16 09:19 -0700
        Re: strtoll discussion Keith Thompson <kst-u@mib.org> - 2015-04-16 10:43 -0700
          Re: strtoll discussion Tim Rentsch <txr@alumni.caltech.edu> - 2015-04-17 07:59 -0700
  Re: strtoll discussion Philipp Klaus Krause <pkk@spth.de> - 2015-04-07 11:46 +0200

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