| delorie.com/archives/browse.cgi | search |
| From: | Horst Kraemer <horst DOT kraemer AT gmx DOT de> |
| Newsgroups: | comp.os.msdos.djgpp |
| Subject: | Re: modf BROKEN ?? |
| Date: | Tue, 01 Aug 2000 19:37:54 +0200 |
| Lines: | 20 |
| Message-ID: | <mrrcossdr6n0c4oq3mfcblt7d0vtbbposk@4ax.com> |
| References: | <crdcosk167oh81vpnjfqeg1bnls5qqg9ld AT 4ax DOT com> |
| NNTP-Posting-Host: | a11e2.pppool.de (213.6.17.226) |
| Mime-Version: | 1.0 |
| X-Trace: | fu-berlin.de 965151443 6010865 213.6.17.226 (16 [27606]) |
| X-Newsreader: | Forte Agent 1.8/32.548 trialware |
| To: | djgpp AT delorie DOT com |
| DJ-Gateway: | from newsgroup comp.os.msdos.djgpp |
| Reply-To: | djgpp AT delorie DOT com |
On Mon, 31 Jul 2000 22:37:40 -0400, Radical NetSurfer <radsmail AT juno DOT com> wrote: > Why does the following program INCORRECTLY display > the fractional part? It does display CORRECTLY the fractional part. The problem is that you think that adding up 20 times the floating point value 0.1 will yield exactly 2.0. The number 0.1 isn't exactly representable as a binary floating point number. Adding up the "wrong" binary value associated to '0.1' will increase the representation error. Using FP numbers as contrl variable in a loop is almost always an error. Regards Horst
| webmaster | delorie software privacy |
| Copyright © 2019 by DJ Delorie | Updated Jul 2019 |