> Thanks Peter, that is very detailed. In my case, I have to deal with amounts > that are always doubles with two decimals. Since I need to add these > numbers, but only after transforming them to integers, I do not have to > implement my own rounding routine. I need however to prevent the > introduction of rounding errors...
So you know you must sum the amounts using the Kahan Summation Formula, don't you? ;) The worst thing you can do is to round at every step of your iteration, round the grand total.. > > > -----Original Message----- > From: Discussion of advanced .NET topics. > [mailto:[EMAIL PROTECTED] Behalf Of Peter Vertes > Sent: Monday, August 25, 2008 12:59 PM > To: ADVANCED-DOTNET@DISCUSS.DEVELOP.COM > Subject: Re: [ADVANCED-DOTNET] Converting doubles into integers without > rounding errors > > > If you are ready to make your head spin take a look at these pages: > > http://en.wikipedia.org/wiki/Bankers_rounding > http://support.microsoft.com/kb/196652 > http://blogs.msdn.com/ericlippert/archive/2003/09/26/53107.aspx > > -Pete > > On Mon, Aug 25, 2008 at 12:51 PM, Curt Hagenlocher > <[EMAIL PROTECTED]>wrote: > >> On Mon, Aug 25, 2008 at 9:48 AM, Peter Ritchie >> <[EMAIL PROTECTED]> wrote: >> > >> > I would recommend something like this: >> > >> > double tempAmount = objMyObject.Amount * 100.0; >> > uint nIntAmount = Math.Round(tempAmount); >> >> Ah, *that*'s where the rounding function is hiding. >> >> Or you could just use "Math.Round(amount, 2)" to round to the second >> decimal place. >> >> -- >> Curt Hagenlocher >> [EMAIL PROTECTED] >> >> =================================== >> This list is hosted by DevelopMentor(R) http://www.develop.com >> >> View archives and manage your subscription(s) at >> http://discuss.develop.com >> > > =================================== > This list is hosted by DevelopMentor(R) http://www.develop.com > > View archives and manage your subscription(s) at http://discuss.develop.com > > =================================== > This list is hosted by DevelopMentor(R) http://www.develop.com > > View archives and manage your subscription(s) at http://discuss.develop.com > =================================== This list is hosted by DevelopMentor® http://www.develop.com View archives and manage your subscription(s) at http://discuss.develop.com
