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Re: A final word on casting.

From Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups comp.lang.c
Subject Re: A final word on casting.
Date 2019-02-28 15:16 +0000
Organization A noiseless patient Spider
Message-ID <871s3sx7tb.fsf@bsb.me.uk> (permalink)
References (9 earlier) <q0oj0b$khc$1@dont-email.me> <86mumjau3t.fsf@mailhub.linuxsc.com> <q58l4p$q2g$1@dont-email.me> <exactly-20190228140659@ram.dialup.fu-berlin.de> <interval-20190228141733@ram.dialup.fu-berlin.de>

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ram@zedat.fu-berlin.de (Stefan Ram) writes:

> ram@zedat.fu-berlin.de (Stefan Ram) writes:
>>So, even 0.5 is not "exactly representable". So, there are no
>>exactly representable values in the type double.
>
>   In a sense a bit pattern for a floating point number /is/
>   exact:
>
>   It exactly represents a specific real interval.

And it's exact in another, simpler sense: it exactly represents a
rational.  For C, exactly which rational is explained in the C standard.

BTW, what interval do you think a particular bit pattern represents?

<cut>
-- 
Ben.

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Thread

Re: A final word on casting. Tim Rentsch <tr.17687@z991.linuxsc.com> - 2019-02-25 23:26 -0800
  Re: A final word on casting. "I Set My Girlfriend's Pantyhose on Fire" <cdalten@gmail.com> - 2019-02-26 03:12 -0800
  Re: A final word on casting. James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-02-26 05:41 -0800
    Re: A final word on casting. James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-02-26 19:00 -0800
      Re: A final word on casting. James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-02-27 06:37 -0800
  Re: A final word on casting. James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-02-28 07:45 -0500
    Re: A final word on casting. James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-02-28 08:20 -0500
    Re: A final word on casting. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-02-28 15:16 +0000
      Re: A final word on casting. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-03-01 01:16 +0000
        Re: A final word on casting. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-03-02 01:10 +0000
    Re: A final word on casting. Tim Rentsch <tr.17687@z991.linuxsc.com> - 2019-03-06 08:36 -0800
      Re: A final word on casting. Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2019-03-06 09:04 -0800
        Re: A final word on casting. Ben Bacarisse <ben.usenet@bsb.me.uk> - 2019-03-21 11:19 +0000
    Re: A final word on casting. Tim Rentsch <tr.17687@z991.linuxsc.com> - 2019-03-06 09:33 -0800
      Re: A final word on casting. James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-03-06 11:19 -0800
        Re: A final word on casting. Tim Rentsch <tr.17687@z991.linuxsc.com> - 2019-03-23 10:49 -0700
          Re: A final word on casting. James Kuyper <jameskuyper@alumni.caltech.edu> - 2019-03-25 12:06 -0700

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