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Groups > comp.lang.c++ > #5940
| From | Miles Bader <miles@gnu.org> |
|---|---|
| Newsgroups | comp.lang.c++ |
| Subject | Re: File Manipulation? |
| Date | 2011-06-01 15:07 +0900 |
| Organization | NEC Electronics |
| Message-ID | <buod3iy6q59.fsf@dhlpc061.dev.necel.com> (permalink) |
| References | <c32da847-b415-4ba3-954c-e51ee8cbf5ff@e35g2000yqc.googlegroups.com> <cf251945-cabd-4db5-b76f-db411c021658@a26g2000vbo.googlegroups.com> <1bd4e783-6dbc-4eac-9255-3c8f71bedd0a@d28g2000yqf.googlegroups.com> <slrniuar53.gtj.grahn+nntp@frailea.sa.invalid> |
Jorgen Grahn <grahn+nntp@snipabacken.se> writes: > - you can't reliably use != on doubles Of course one shouldn't do so blindly, but there are certainly cases where it makes sense to use != or == on doubles. E.g., comparison of doubles holding integral values that result from an explicit assignment should be fine (double d = 47; .... if (d != 47) ). This is very useful for detecting explicitly assigned out-of-band (for the algorithm) values. [I guess some fractional values (e.g. 0.5) should in practice also be OK since they're exactly representable in any sane radix (2, 10, 16).] -Miles -- Consult, v.i. To seek another's disapproval of a course already decided on.
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File Manipulation? A Moose in Love <parkstreetbooboo@gmail.com> - 2011-05-30 17:20 -0700
Re: File Manipulation? Ian Collins <ian-news@hotmail.com> - 2011-05-31 12:24 +1200
Re: File Manipulation? Öö Tiib <ootiib@hot.ee> - 2011-05-30 18:15 -0700
Re: File Manipulation? A Moose in Love <parkstreetbooboo@gmail.com> - 2011-05-30 19:22 -0700
Re: File Manipulation? Ian Collins <ian-news@hotmail.com> - 2011-05-31 14:33 +1200
Re: File Manipulation? John Smith <bit_bucket@gmx.com> - 2011-05-30 19:57 -0700
Re: File Manipulation? Liberian Freighter <parkstreetbooboo@gmail.com> - 2011-05-31 06:41 -0700
Re: File Manipulation? Geoff <geoff@invalid.invalid> - 2011-05-30 19:59 -0700
Re: File Manipulation? Geoff <geoff@invalid.invalid> - 2011-05-30 20:25 -0700
Re: File Manipulation? Jorgen Grahn <grahn+nntp@snipabacken.se> - 2011-05-31 22:33 +0000
Re: File Manipulation? Miles Bader <miles@gnu.org> - 2011-06-01 15:07 +0900
Re: File Manipulation? Juha Nieminen <nospam@thanks.invalid> - 2011-05-31 08:25 +0000
Re: File Manipulation? "Fred Zwarts \(KVI\)" <F.Zwarts@KVI.nl> - 2011-05-31 16:25 +0200
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