Re: Funny Comparison with Float
Peter Ritchie <[email protected]> Fri, 7 Mar 2008 11:55:34 -0500
| Newsgroups | gmane.comp.windows.devel.dotnet.clr |
|---|---|
| Message-ID | <LISTSERV%[email protected]> |
If only the framework contained useful[1] values for Epsilon. [1] https://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx? FeedbackID=93726&wa=wsignin1.0 On Fri, 7 Mar 2008 09:55:12 -0700, Keith Hill <[email protected]> wrote: >> -----Original Message----- >> From: Brady Kelly [mailto:[email protected]] >> Sent: Thursday, March 06, 2008 7:20 AM >> Subject: Re: Funny Comparison with Float >> >> > BTW, you never should check floats or doubles with an equal sign. >> > Always use a greater or less sign. >> > >> > // Ryan >> >> Like 'version > 1 && version < 1.11' ? >> > >It is a bit more complicated than that. A robust "AlmostEquals" routine would handle not only epsilon (I'd use something like 1E-5) but also Inf, NaN and overflow when adding and/or subtracting the two values to compare to epsilon). You might check around for a math library that does this. =================================== This list is hosted by DevelopMentor® http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com