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Path: utzoo!linus!decvax!harpo!floyd!vax135!cornell!hal
From: hal@cornell.UUCP (Hal Perkins)
Newsgroups: net.lang.c
Subject: Re: Question about toupper and tolower
Message-ID: <5634@cornell.UUCP>
Date: Fri, 11-Nov-83 20:26:23 EST
Article-I.D.: cornell.5634
Posted: Fri Nov 11 20:26:23 1983
Date-Received: Sun, 13-Nov-83 11:23:33 EST
References: <300@bbncca.ARPA>
Organization: Cornell Computer Science
Lines: 8

You can't just turn on or off the high-order bit on any character to
convert between upper and lower case.  You still need to test that the
character you are converting is really a letter, and not a digit or
punctuation mark that should not be changed by toupper and tolower.


Hal Perkins                         UUCP: {decvax|vax135|...}!cornell!hal
Cornell Computer Science            ARPA: hal@cornell  BITNET: hal@crnlcs