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Groups > comp.lang.c > #109599

Re: Printing like palindrome

From Keith Thompson <kst-u@mib.org>
Newsgroups comp.lang.c
Subject Re: Printing like palindrome
Date 2017-05-09 08:27 -0700
Organization None to speak of
Message-ID <ln7f1q9hjv.fsf@kst-u.example.com> (permalink)
References <5911a0f4$0$294$14726298@news.sunsite.dk> <5a1f955b-6510-4632-89c8-cc3e23b39fa8@googlegroups.com> <cPkQA.151062$3%2.136252@fx09.iad>

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scott@slp53.sl.home (Scott Lurndal) writes:
> mark.bluemel@gmail.com writes:
>>On Tuesday, 9 May 2017 11:58:57 UTC+1, arnuld  wrote:
>>> Programs works fine, I just wanted suggestions for improvement:
>>
>>As Barry points out, it wouldn't run fine everywhere.
>>
>>All the world is not ASCII.
>>
>>See <https://en.wikipedia.org/wiki/EBCDIC> and note what comes
>>after 'i' for example...
>
> Although IBM Z-series and Unisys Clearpath have C compilers, they're
> not widely used.  The rest of the EBCDIC machines either don't have C
> or have been obsolete for a decade or two.
>
> In any case, the problem statement didn't require universal portability.

I'd still use isalpha().

Incidentally, isalpha() has undefined behavior given a negative argument
(other than EOF), and some char values can be negative.  You need to
write `isalpha((unsigned char)temp)` rather than just `isalpha(temp)`.

-- 
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

Printing like palindrome arnuld <sunrise@invalid.address> - 2017-05-09 10:59 +0000
  Re: Printing like palindrome Barry Schwarz <schwarzb@dqel.com> - 2017-05-09 04:26 -0700
    Re: Printing like palindrome Robert Wessel <robertwessel2@yahoo.com> - 2017-05-09 14:10 -0500
      Re: Printing like palindrome Keith Thompson <kst-u@mib.org> - 2017-05-09 12:33 -0700
        Re: Printing like palindrome Richard Heathfield <rjh@cpax.org.uk> - 2017-05-09 23:05 +0100
          Re: Printing like palindrome raltbos@xs4all.nl (Richard Bos) - 2017-05-10 10:25 +0000
            Re: Printing like palindrome Richard Heathfield <rjh@cpax.org.uk> - 2017-05-10 11:44 +0100
          Re: Printing like palindrome Keith Thompson <kst-u@mib.org> - 2017-05-10 09:48 -0700
            Re: Printing like palindrome Gareth Owen <gwowen@gmail.com> - 2017-05-10 18:59 +0100
        Re: Printing like palindrome arnuld <sunrise@invalid.address> - 2017-05-12 07:14 +0000
      Re: Printing like palindrome arnuld <sunrise@invalid.address> - 2017-05-12 07:44 +0000
    Re: Printing like palindrome arnuld <sunrise@invalid.address> - 2017-05-12 07:20 +0000
      Re: Printing like palindrome Keith Thompson <kst-u@mib.org> - 2017-05-12 08:49 -0700
        Re: Printing like palindrome arnuld <sunrise@invalid.address> - 2017-05-14 02:01 +0000
  Re: Printing like palindrome mark.bluemel@gmail.com - 2017-05-09 07:13 -0700
    Re: Printing like palindrome scott@slp53.sl.home (Scott Lurndal) - 2017-05-09 14:59 +0000
      Re: Printing like palindrome Keith Thompson <kst-u@mib.org> - 2017-05-09 08:27 -0700
      Re: Printing like palindrome Barry Schwarz <schwarzb@dqel.com> - 2017-05-09 10:40 -0700
  Re: Printing like palindrome scott@slp53.sl.home (Scott Lurndal) - 2017-05-09 14:38 +0000
    Re: Printing like palindrome Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-05-09 22:48 +0100
      Re: Printing like palindrome scott@slp53.sl.home (Scott Lurndal) - 2017-05-10 13:21 +0000
        Re: Printing like palindrome Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-05-10 15:45 +0100
        Re: Printing like palindrome Barry Schwarz <schwarzb@dqel.com> - 2017-05-10 10:26 -0700
  Re: Printing like palindrome bartc <bc@freeuk.com> - 2017-05-09 21:28 +0100
    Re: Printing like palindrome raltbos@xs4all.nl (Richard Bos) - 2017-05-10 10:27 +0000
    Re: Printing like palindrome Chad <cdalten@gmail.com> - 2017-05-10 10:39 -0700
  Re: Printing like palindrome bartc <bc@freeuk.com> - 2017-05-10 12:54 +0100
  Printing like palindrome asetofsymbols@gmail.com - 2017-05-12 02:32 -0700

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