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Groups > comp.lang.c > #65124

Re: Recursion or loop, design questions

From James Kuyper <jameskuyper@verizon.net>
Newsgroups comp.lang.c
Subject Re: Recursion or loop, design questions
Date 2015-07-10 11:52 -0400
Organization Self
Message-ID <559FEA49.9020007@verizon.net> (permalink)
References <mnljil$g29$1@speranza.aioe.org> <60a17017-4fa3-4367-8b88-02038deb499e@googlegroups.com> <mnlrnn$7ek$1@speranza.aioe.org> <mnm7ak$5cv$1@speranza.aioe.org> <mnm85m$7i4$1@speranza.aioe.org>

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On 07/09/2015 12:41 PM, Morten W. Petersen wrote:
> On 09.07.2015 18:25, Chris M. Thomasson wrote:
...
>> Recursion is fine.
>>
>> Just keep in mind that it can blow the stack if you go too deep!
> 
> Blow the stack.. is that something that can be exploited, ...

Yes.

> ... be a security risk? ...

Yes.

> ... I've seen "smashing the stack" and other phrases
> used before, is it the same ...

Yes.

> ... or simply running out of memory?

Yes.

These terms all refer to the fact that each level of recursion will
generally use up additional memory, and if the recursion goes too far,
it will use up all available memory. The next recursive call will after
that happens will have undefined behavior. The standard provides no
method for detecting whether this will happen, nor whether it has
happened. This is not unique to recursive functions: any function will
have undefined behavior if executed when there's insufficient memory
available to store it's local objects. However, recursive function calls
can make this more likely to happen.

> If I manage a stack in a loop then the worst case seems to
> be just running out of memory.

Unless the recursive function is tail-recursive, it may require the
storage of a separate copy of at least some of it's local variables for
each level of the recursion. The looping equivalent will need to store
the same information in some other way, usually in an array, possibly
dynamically allocated.
If it's a fixed length local array, it might not be big enough, and if
it is big enough, it might exceed the amount of memory available, in
which case the looping function will fail for the same reason the
recursive one did. If it's allocated dynamically (using
malloc()/calloc()/realloc()), the the allocation can fail - but in this
case, you can detect the failure and deal with it.

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Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 12:49 +0200
  Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 12:03 +0100
    Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 14:15 +0200
      Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 13:49 +0100
        Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 15:15 +0200
          Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 14:25 +0100
            Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 15:36 +0200
              Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 14:51 +0100
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 16:02 +0200
              Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-09 20:48 +0100
          Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-07-09 09:54 -0400
            Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 15:08 +0100
              Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 16:16 +0200
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 15:18 +0100
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 16:24 +0200
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-09 20:31 +0100
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 21:42 +0200
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-10 00:57 +0100
        Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-09 20:39 +0100
          Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 21:44 +0100
          Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-09 22:50 +0100
    Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-09 13:49 +0100
      Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 13:52 +0100
        Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 15:26 +0200
          Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 14:28 +0100
  Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-09 05:28 -0700
    Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 15:09 +0200
      Re: Recursion or loop, design questions "Chris M. Thomasson" <nospam@nospam.nospam> - 2015-07-09 09:25 -0700
        Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 18:41 +0200
          Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-07-10 11:52 -0400
            Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-10 18:44 +0200
              Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-10 18:52 +0100
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-10 20:34 +0200
            Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-10 11:50 -0700
              Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-10 20:56 +0200
              Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-10 13:30 -0700
                Re: Recursion or loop, design questions Philip Lantz <prl@canterey.us> - 2015-07-11 10:51 -0700
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-11 16:07 -0700
                Re: Recursion or loop, design questions Philip Lantz <prl@canterey.us> - 2015-07-12 00:20 -0700
              Re: Recursion or loop, design questions gordonb.j93iw@burditt.org (Gordon Burditt) - 2015-07-11 21:26 -0500
      Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-09 10:08 -0700
        Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 19:19 +0200
          Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-09 19:11 +0100
            Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 21:28 +0200
  Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-09 13:41 +0100
    Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 15:22 +0200
  Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 18:45 +0200
  Re: Recursion or loop, design questions glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-07-09 18:05 +0000
    Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-11 07:06 -0700
      Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-11 15:51 -0700
        Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-15 09:36 -0700
          Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-15 10:49 -0700
          Re: Recursion or loop, design questions Robert Wessel <robertwessel2@yahoo.com> - 2015-07-15 13:05 -0500
            Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 10:28 -0700
              Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-20 12:41 -0700
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-20 21:37 +0100
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-24 13:05 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-24 15:07 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-30 12:42 -0700
              Re: Recursion or loop, design questions Robert Wessel <robertwessel2@yahoo.com> - 2015-07-24 15:38 -0500
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-30 12:39 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-30 22:35 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-08-02 07:09 -0700
                Re: Recursion or loop, design questions Robert Wessel <robertwessel2@yahoo.com> - 2015-08-02 14:43 -0500
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-08-03 09:48 -0700
  Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-09 21:23 +0200
  Re: Recursion or loop, design questions Andrew Cooper <amc96@cam.ac.uk> - 2015-07-10 00:52 +0100
    Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-10 01:28 +0100
      Re: Recursion or loop, design questions Phil Carmody <pc+usenet@asdf.org> - 2015-07-12 13:20 +0300
        Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-12 11:39 +0100
          Re: Recursion or loop, design questions David Kleinecke <dkleinecke@gmail.com> - 2015-07-12 10:28 -0700
          Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-13 08:17 +1200
            Re: Recursion or loop, design questions David Brown <david.brown@hesbynett.no> - 2015-07-21 14:46 +0200
              Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-25 19:27 -0700
          Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-07-13 21:16 +0000
    Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-10 08:34 +0100
      Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-10 00:46 -0700
      Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-10 12:35 +0200
        Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-10 12:47 +0100
          Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-10 14:29 +0200
    Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-11 06:36 -0700
      Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-11 07:16 -0700
        Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-15 14:23 -0700
          Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-15 15:27 -0700
            Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 19:27 -0700
      Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-11 15:27 +0100
        Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-11 08:00 -0700
          Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-11 15:46 -0700
            Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-11 16:01 -0700
            Re: Recursion or loop, design questions glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-07-12 00:36 +0000
          Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-15 13:55 -0700
            Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-15 14:12 -0700
              Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 19:45 -0700
        Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-15 14:34 -0700
          Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-15 15:37 -0700
            Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-16 10:07 +0100
              Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-16 10:18 +0100
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-16 13:35 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-16 21:10 -0700
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-17 13:55 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-17 11:16 -0700
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-17 11:25 -0700
                Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-17 20:51 +0100
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-17 13:48 -0700
                Re: Recursion or loop, design questions David Brown <david.brown@hesbynett.no> - 2015-07-21 15:12 +0200
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-21 10:56 -0700
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-21 19:43 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-21 12:52 -0700
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-21 21:17 +0100
                Re: Recursion or loop, design questions David Brown <david.brown@hesbynett.no> - 2015-07-21 23:58 +0200
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-22 20:39 +0100
                Re: Recursion or loop, design questions Richard Damon <Richard@Damon-Family.org> - 2015-07-24 00:54 -0400
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-24 09:06 +0100
                Re: Recursion or loop, design questions Richard Damon <Richard@Damon-Family.org> - 2015-07-24 08:04 -0400
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-24 13:48 +0100
                Re: Recursion or loop, design questions Richard Damon <Richard@Damon-Family.org> - 2015-07-25 14:02 -0400
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-30 13:41 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-02 15:41 +0200
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-08-02 21:51 +0000
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-03 01:20 +0200
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-08-04 10:54 +0000
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-04 06:02 -0700
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-08-04 14:03 +0100
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-08-04 11:36 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-08-04 11:21 -0700
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-04 12:18 -0700
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-04 13:19 -0700
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-04 13:35 -0700
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-08-04 21:40 +0100
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-04 13:51 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-04 22:57 +0200
                Re: Recursion or loop, design questions David Brown <david.brown@hesbynett.no> - 2015-08-05 08:45 +0200
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-04 14:19 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-04 23:22 +0200
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-04 14:28 -0700
                Language (was: Re: Recursion or loop, design questions) "Morten W. Petersen" <morphex@gmail.com> - 2015-08-04 23:35 +0200
                Re: Language (was: Re: Recursion or loop, design questions) Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-04 14:45 -0700
                Re: Language "Morten W. Petersen" <morphex@gmail.com> - 2015-08-04 23:55 +0200
                Re: Language (was: Re: Recursion or loop, design questions) fir <profesor.fir@gmail.com> - 2015-08-04 16:44 -0700
                Re: Language (was: Re: Recursion or loop, design questions) fir <profesor.fir@gmail.com> - 2015-08-04 17:18 -0700
                Re: Language (was: Re: Recursion or loop, design questions) fir <profesor.fir@gmail.com> - 2015-08-05 01:32 -0700
                Re: Language Richard Heathfield <rjh@cpax.org.uk> - 2015-08-05 09:51 +0100
                Re: Language Richard Heathfield <rjh@cpax.org.uk> - 2015-08-05 12:55 +0100
                Re: Language Gareth Owen <gwowen@gmail.com> - 2015-08-05 19:12 +0100
                Re: Language Richard Heathfield <rjh@cpax.org.uk> - 2015-08-06 17:09 +0100
                Re: Language luser droog <luser.droog@gmail.com> - 2015-08-06 15:10 -0700
                Re: Language Richard Heathfield <rjh@cpax.org.uk> - 2015-08-07 09:48 +0100
                Re: Language luser droog <luser.droog@gmail.com> - 2015-08-07 13:37 -0700
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-08-06 10:54 +0000
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-06 13:32 +0200
                Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-08-06 11:06 -0400
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-06 11:52 -0700
                Re: Recursion or loop, design questions David Brown <david.brown@hesbynett.no> - 2015-08-06 21:19 +0200
                Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-08-06 17:59 -0400
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-06 15:54 -0700
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-06 12:56 -0700
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-07 23:45 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-08 09:27 +0200
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-08 01:09 -0700
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-08 01:34 -0700
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-08-08 13:00 -0700
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-08 14:22 -0700
                Re: Recursion or loop, design questions David Kleinecke <dkleinecke@gmail.com> - 2015-08-08 16:12 -0700
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-08-08 17:31 -0700
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-08-09 13:34 +0000
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-09 08:38 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-09 09:31 +0200
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-09 01:52 -0700
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-06 04:40 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-25 20:19 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-25 23:59 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-30 15:53 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-25 19:43 -0700
                Re: Recursion or loop, design questions David Kleinecke <dkleinecke@gmail.com> - 2015-07-25 20:05 -0700
                Re: Recursion or loop, design questions Richard Heathfield <rjh@cpax.org.uk> - 2015-07-27 23:53 +0100
                Re: Recursion or loop, design questions fir <profesor.fir@gmail.com> - 2015-08-03 01:51 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-08-03 10:04 -0700
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-17 21:34 +0100
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-17 13:52 -0700
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-17 21:57 +0100
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-18 10:44 +0100
                Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-18 11:00 +0100
                Re: Recursion or loop, design questions Robert Wessel <robertwessel2@yahoo.com> - 2015-07-18 05:25 -0500
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-18 14:26 +0100
                Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-18 17:38 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-18 10:05 -0700
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-18 21:31 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-18 14:28 -0700
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-18 15:01 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-18 15:39 -0700
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-18 15:44 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-18 15:55 -0700
                Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-19 10:58 +1200
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-18 16:26 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-18 17:23 -0700
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-18 18:04 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 00:03 -0700
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-19 13:30 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 08:45 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-19 20:59 +0200
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-19 21:19 +0200
                Re: Recursion or loop, design questions Les Cargill <lcargill99@comcast.com> - 2015-07-20 07:23 -0500
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-07-19 21:11 +0000
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 15:37 -0700
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-08-09 13:55 +0000
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-09-05 11:22 -0700
                Re: Recursion or loop, design questions Gareth Owen <gwowen@gmail.com> - 2015-07-19 17:22 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 10:25 -0700
                Re: Recursion or loop, design questions Robert Wessel <robertwessel2@yahoo.com> - 2015-07-19 03:15 -0500
                Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-19 10:36 +0100
                Re: Recursion or loop, design questions Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2015-07-19 12:45 -0400
                Re: Recursion or loop, design questions Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2015-07-19 13:05 -0400
                Re: Recursion or loop, design questions Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2015-07-19 13:09 -0400
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 10:40 -0700
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-19 22:31 +0100
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-08-09 14:05 +0000
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-08-09 21:22 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-09 16:14 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-10 05:39 +0200
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-10 01:40 -0700
                Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-08-10 21:03 +1200
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-10 03:16 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-10 12:16 +0200
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-08-10 03:36 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-10 12:45 +0200
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-08-22 14:07 +0000
                Re: Recursion or loop, design questions raltbos@xs4all.nl (Richard Bos) - 2015-08-22 14:07 +0000
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 02:47 -0700
                Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-19 22:23 +1200
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 05:01 -0700
                Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-20 09:55 +1200
                Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-19 23:13 +0100
                Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-20 10:19 +1200
                Re: Recursion or loop, design questions Robert Wessel <robertwessel2@yahoo.com> - 2015-07-19 17:21 -0500
                Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-20 00:25 +0100
                Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-20 11:45 +1200
                Re: Recursion or loop, design questions Robert Wessel <robertwessel2@yahoo.com> - 2015-07-20 02:34 -0500
                Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-20 10:52 +0100
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-20 05:31 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 22:16 -0700
                Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-20 17:24 +1200
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 22:36 -0700
                Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-20 21:07 +1200
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-20 02:51 -0700
                Re: Recursion or loop, design questions Les Cargill <lcargill99@comcast.com> - 2015-07-19 10:12 -0500
                Re: Recursion or loop, design questions Robert Wessel <robertwessel2@yahoo.com> - 2015-07-19 16:54 -0500
                Re: Recursion or loop, design questions Les Cargill <lcargill99@comcast.com> - 2015-07-20 12:34 -0500
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-23 07:28 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-27 11:08 +0200
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-30 15:45 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-02 14:59 +0200
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-08-04 08:40 -0700
                Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-08-04 23:05 +0200
                Re: Recursion or loop, design questions Keith Thompson <kst-u@mib.org> - 2015-07-19 12:46 -0700
                Re: Recursion or loop, design questions Malcolm McLean <malcolm.mclean5@btinternet.com> - 2015-07-19 12:57 -0700
                Re: Recursion or loop, design questions Gareth Owen <gwowen@gmail.com> - 2015-07-19 21:16 +0100
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 15:50 -0700
                Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-07-18 09:13 -0400
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-18 15:04 +0100
                Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-07-18 12:40 -0400
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 16:27 -0700
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-18 14:26 +0100
                Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-07-18 09:58 -0400
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-18 15:24 +0100
                Re: Recursion or loop, design questions Richard Damon <Richard@Damon-Family.org> - 2015-07-18 10:29 -0400
                Re: Recursion or loop, design questions glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-07-18 17:32 +0000
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 15:28 -0700
                Re: Recursion or loop, design questions glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2015-07-20 22:58 +0000
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-23 03:13 -0700
                Re: Recursion or loop, design questions Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-07-18 21:49 +0100
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 15:12 -0700
                Re: Recursion or loop, design questions "Chris M. Thomasson" <nospam@nospam.nospam> - 2015-07-20 15:21 -0700
                Re: Recursion or loop, design questions "Chris M. Thomasson" <nospam@nospam.nospam> - 2015-07-20 15:23 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-23 03:46 -0700
                Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-23 03:31 -0700
            Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-21 04:08 -0700
  Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-11 08:50 -0700
    Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-11 18:43 +0200
      Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-11 18:54 +0200
        Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-07-11 13:06 -0400
          Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-12 23:45 +0200
            Re: Recursion or loop, design questions James Kuyper <jameskuyper@verizon.net> - 2015-07-12 17:48 -0400
              Re: Recursion or loop, design questions "Morten W. Petersen" <morphex@gmail.com> - 2015-07-13 01:27 +0200
      Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-11 19:39 +0100
      Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-11 14:51 -0700
        Re: Recursion or loop, design questions Bartc <bc@freeuk.com> - 2015-07-11 23:51 +0100
          Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-15 08:04 -0700
        Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-16 09:36 +1200
          Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-20 10:37 -0700
            Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-21 20:55 +1200
              Re: Recursion or loop, design questions Tim Rentsch <txr@alumni.caltech.edu> - 2015-07-23 07:39 -0700
      Re: Recursion or loop, design questions Ian Collins <ian-news@hotmail.com> - 2015-07-16 09:41 +1200

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