>> I'm afraid I can't help you on the actual question of this thread. >But I do >> want to encourage you to continue in your math programming in Delphi 2. >> > >I am really encouraged by this. Even before yours and Martin's >comments, I was intuiting the Delphi was delivering often 18-digit and >at least 17 digit precision in cirmumstances where the analogous code >in BC++ (albeit an older version) didn't seem to get quite so close >with the long double type in the last couple of digits, though >admittedly the results were still not bad, especially when compared to >MSVC++ which doesn't even seem to support the long double type and >gives only 16 good digits if one is lucky. I should note that I >started these meanderings with VB4 which has at best a 15-digit double >type, though the interface is so user friendly and the coding so >forgiving. Upgrading to VB6 courtesy of a good ebay deal with the >hopes of greater precision through the CDec typing hasn't come to >fruition, since the Decimal type, which is really an integer I >believe, was never fully implemented. > >FYI, I have downloaded the BCD20 high precision package, but I must >admit the high end C++ coding is so inscrutable to my amateur eyeballs >that I have no idea whether I could use the routines in my bush league >C/C++ explorations, expecially since my compliers are pretty ancient. >That said, it would be so sweet to learn how to code some high >precision routines and compile them to a DLL for export to Delphi >programs. Of course, this may not be so easy to do, giving issues of >type compatiblity. > >Thank you so much for your feedback. Since my D2 code to date gives >desired results on most computers I have tried except my main >computer, the lesson to be learned is that I may have to used another >computer if I want to see the best results, and when I shop for a new >computer I should be sure to take one or two little Delphi programs on >a flash card to test whether the processor interacts with my Delphi >work in the fashion I desire to see. > >Les
Les, I still use D2 extensively for both command line and GUI Win32 programs. I prefer to use the Windows API directly and have not seen anything that I need in newer versions. From what I understand, the newer versions produce larger and slower EXE's than D2. Another thing you might want to consider is an arbitrary precision math library. I used to do a lot of LISP programming years ago, and one of the unusual features in LISP is built-in arbitrary precision math. Most implementations are limited only by the available RAM. I haven't seen any specifically for Delphi, but I have seen many for C++. All you would need is to write a simple wrapper for the arbitrary precision functions in C++ to a DLL that passes the numbers as null-terminated strings in both directions. This would obviously impact performance compared with executing directly on the FPU, but it sounds like you are primarily concerned with precision. Glenn Lawler www.incodesystems.com ------------------------ Yahoo! Groups Sponsor --------------------~--> Something is new at Yahoo! Groups. Check out the enhanced email design. http://us.click.yahoo.com/SISQkA/gOaOAA/yQLSAA/i7folB/TM --------------------------------------------------------------------~-> ----------------------------------------------------- Home page: http://groups.yahoo.com/group/delphi-en/ To unsubscribe: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/delphi-en/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
