From 6401770961265424144 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f78e5,66c191af91069dde X-Google-Attributes: gidf78e5,public From: devphil@my-dejanews.com Subject: Re: "minimum maxima" for fundamental types Date: 1998/10/08 Message-ID: <6vgg8d$hc7$1@nnrp1.dejanews.com>#1/1 X-Deja-AN: 398852388 Approved: Fergus Henderson References: <3619CE5F.CAFFE468@alcatel.de> X-Original-Date: Wed, 07 Oct 1998 19:43:09 GMT X-Http-User-Agent: Mozilla/4.05 [en] (WinNT; U) X-Complaints-To: news@news.unimelb.edu.au X-Http-Proxy: 1.0 x13.dejanews.com:80 (Squid/1.1.22) for client 209.64.26.5 X-Trace: izvestia.its.unimelb.edu.au 907813763 27223 128.250.29.17 (8 Oct 1998 02:29:23 GMT) Organization: $home is where the core is X-Article-Creation-Date: Wed Oct 07 19:43:09 1998 GMT X-Auth: PGPMoose V1.1 PGP comp.std.c++ iQBFAgUANhwjauEDnX0m9pzZAQGmZAF/cfieIUY+qKEHZegXQtuGXAgTtzi7RFCC 9wo+PDy+upO70P1y0DlR9iPjSxBqWd+Y =POFT NNTP-Posting-Date: 8 Oct 1998 02:29:23 GMT Newsgroups: comp.std.c++ [Cc'd to poster] In article <3619CE5F.CAFFE468@alcatel.de>, Fritz Bosch wrote: > > The ISO C standard defines "minimum maxima" for the values values of > fundamental types, e.g.: > > int: -32767 to 32767 > unsigned int: 0 to 65535 > long: -2147483647 to 2147483647 > > The C++ standard (actually the Public Review Document) is not that > specific: [3.9.1]/2 > 2 There are four signed integer types: "signed char", "short int", > "int", and "long int." In this list, each type provides at least as > much storage as those preceding it in the list. Plain ints have the > natural size suggested by the architecture of the execution > environment; the other signed integer types are provided to meet ^ ^ ^ The footnote at this point in the published Standard adds, "that is, large enough to contain any value in the range of INT_MIN and INT_MAX, as defined in the header ." So there are /some/ minimum and maximum values for int given, beyond the normative reference to the C Standard; you just have to use the preprocessor and/or numeric_limits<> to see what they are. :-) I suspect that the "hardcoded" ISO C requirements are a little outdated; a quick grep on an older-but-still-useful platform gives me this for 'int' and 'unsigned int': [monkey 115]> grep INT_MIN /usr/include/limits.h #define INT_MIN (-2147483647-1) [monkey 116]> grep INT_MAX /usr/include/limits.h #define INT_MAX 2147483647 #define UINT_MAX 4294967295U [monkey 117]> Which is a little bit beyond the 65536-range... Luck++; /dev/phil -----------== Posted via Deja News, The Discussion Network ==---------- http://www.dejanews.com/ Search, Read, Discuss, or Start Your Own --- [ 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://reality.sgi.com/austern_mti/std-c++/faq.html ]