Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!gatech!ncar!ames!haven!adm!smoke!gwyn
From: gwyn@smoke.BRL.MIL (Doug Gwyn)
Newsgroups: comp.std.c
Subject: Re: Character Sets
Message-ID: <10331@smoke.BRL.MIL>
Date: 26 May 89 17:54:30 GMT
References: <4623@freja.diku.dk> <12.UUL1.3#5077@aussie.UUCP> <2469@ogccse.ogc.edu> <373@cybaswan.UUCP> <10194@smoke.BRL.MIL> <442@cybaswan.UUCP> <10284@smoke.BRL.MIL> <456@cybaswan.UUCP>
Reply-To: gwyn@brl.arpa (Doug Gwyn)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 18

In article <456@cybaswan.UUCP> iiit-sh@cybaswan.UUCP (Steve Hosgood) writes:
>I certainly hope so. Presumably the C standard allows for 8-bit character sets?

Understatement of the decade.

>Also, what about such things as allowable characters in identifiers and such
>like? Just yesterday, I was writing a program where I would have liked to have
>used Greek characters as identifiers. Is that sort of thing permissable?

The Standard does not permit use of any character other than _, 0-9, a-z,
and A-Z in identifiers, although comments may contain just about anything.

>Would 'toupper' return upper-case Epsilon if given lower-case epsilon as an
>argument?

That's implementation- and locale-dependent.  In the default ("C")
locale, only 'a' through 'z' are mapped into different characters by
toupper().