From 7188782620158110414 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f78e5,8f99fb45cc0aac84 X-Google-Attributes: gidf78e5,public X-Google-ArrivalTime: 2001-11-29 10:16:01 PST Path: archiver1.google.com!news1.google.com!sn-xit-02!supernews.com!news.tele.dk!small.news.tele.dk!212.74.64.35!colt.net!dispose.news.demon.net!news.demon.co.uk!demon!mail2news.demon.co.uk!not-for-mail From: "Scott Robert Ladd" Newsgroups: comp.std.c++ Subject: Re: Some Thoughts on Numerical C++ Date: Thu, 29 Nov 2001 18:15:02 GMT Organization: RoadRunner - TampaBay Approved: Fergus Henderson , moderator of comp.std.c++ Message-ID: References: X-Trace: mail2news.demon.co.uk 1007057709 mail2news:21668 mail2news mail2news.demon.co.uk X-Complaints-To: abuse@demon.net X-Mail2News-Path: news.demon.net!mulga.cs.mu.oz.au X-Authentication-Warning: mulga.cs.mu.OZ.AU: fjh set sender to devnull@stump.algebra.com using -f X-Robomod: STUMP, ichudov@algebra.com (Igor Chudov) X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 NNTP-Posting-Date: Thu, 29 Nov 2001 13:09:15 EST Lines: 43 Xref: archiver1.google.com comp.std.c++:8368 "Gabriel Dos Reis" wrote > Could you point me to a normative text in the standard that say that > you can mix Fortran and C++ code? I'm not quite sure what you're driving at here. Why would Standard C++ say anything about Fortran? I'm talking about the ease of linking Fortran and C++ object code into a single application, something that is generally easy to do on most platforms. This allows critical numerical code to be written in Fortran and housekeeping code to be developed in C++. But I don't see why Standard C++ would say anything about Fortran, any more than it needs to talk about assembler language... > Concretely, what does that mean to take "an object-oriented approach > to numerical programming"? A simple example: C99 and Fortran implement complex numbers as intrinsic (POD) types; C++ uses a class template. The C++ approach is likely a bit less efficient but more extensible and flexible. I use my own real<> template in some of my work, which takes a template argument defining the underlying type. For no practical cost in efficiency, I gain the ability to switch between single and double precision (or fixed-point, or BCD, or whatever) by changing a template argument. This is similar to Fortran's "kind" capability. C99 uses a function library to control precision, exception-handling, and other characteristics of the floating-point system. I'd like to see something like a "floating point model" class that encapsulates the complete state of FP calculation. -- Scott Robert Ladd Master of Complexity, Destroyer of Order and Chaos Visit CoyoteGulch at http://www.coyotegulch.com No ads -- just info, algorithms, and very free code. --- [ comp.std.c++ is moderated. To submit articles, try just posting with ] [ your news-reader. If that fails, use mailto:std-c++@ncar.ucar.edu ] [ --- Please see the FAQ before posting. --- ] [ FAQ: http://www.research.att.com/~austern/csc/faq.html ]