Or maybe convert them to a character string? Or would that impose a bad overhead?
> -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Daniel Robinson > Sent: 01 March 2005 20:08 > To: [email protected] > Subject: RE: [msvc] long double and Variants > > > > I have to work with large numbers (more the 10^15), > > Well if you know that all of your numbers are going to be big > you could scale them by dividing them by 10^15 (or something > suitable), then they'll be a sensible order of magnitude. > > Remember that it isn't the absolute magnitude of numbers that > yields rounding errors it's mixing orders of magnitude. > > > and for that reason I need to use the long double data type which > > supports 10^19. > > I'm curious whether this is giving you any real benefit... In > the MSDN it > states: > > "Microsoft Visual C++ is consistent with the IEEE numeric > standards. There are three internal varieties of real > numbers. Real*4 and real*8 are used in Visual C++. Real*4 is > declared using the word float. Real*8 is declared using the > word double. In Windows 32-bit programming, the long double > data type maps to double. There is, however, assembly > language support for computations using the real*10 data type." > > So I'm not sure that your long double is actually doing what > you think it is... I haven't checked this out to be > absolutely sure and will yield to anyone's experience. > > >The problem is I that I receive theese values in variant > variables, I > >need > to > >precess them, and then save them back into varinats. I > didn't find any > >way > to > >convert from Variant -> long double -> Variant. > > Is there any way ? > > If the long double really is using the 80-bit IEEE format it > won't fit into a single VARIANT which is only 64-bits wide. I > guess you could encode the value across two VARIANTS but this > is ugly, and probably doesn't achieve what you want. > > I know that doesn't help.... > > Daniel > > > _______________________________________________ > msvc mailing list > [email protected] > See > http://beginthread.com/mailman/listinfo/msvc_beginthread.com > for subscription changes, and list archive. > > > This message has been scanned for viruses by MailControl - > (see http://bluepages.wsatkins.co.uk/?4318150) > This email and any attached files are confidential and copyright protected. If you are not the addressee, any dissemination of this communication is strictly prohibited. Unless otherwise expressly agreed in writing, nothing stated in this communication shall be legally binding. _______________________________________________ msvc mailing list [email protected] See http://beginthread.com/mailman/listinfo/msvc_beginthread.com for subscription changes, and list archive.
