X-Authentication-Warning: delorie.com: mail set sender to djgpp-bounces using -f Date: Thu, 2 Sep 2004 16:41:52 +0200 From: Egon Eckert To: djgpp AT delorie DOT com Subject: scanf: strange behavior? Message-ID: <20040902144152.GH6858@webhome.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.5.1+cvs20040105i Sender: Egon Eckert Reply-To: djgpp AT delorie DOT com Hi, compiling and running this code: #include int main(int, const char**) { char c[2]; printf("%d\n", sscanf("A", "%c%c", c, c + 1)); return 0; } gives: 1 in GNU libc (on Linux) 1 in Borland C++ 3.1 (on DOS) -1 in djgpp It's conformant with the docs: "If input ends, or if there is any input failure before the first item is converted and assigned, `EOF' is returned.", so it's not to be called a 'bug', but... Do you think it's a standard violation, or just a "difference", ie. behavior not specified by POSIX, ANSI or other (involved) authority? Thanks, -- Egon Eckert, Heaven Industries, s.r.o. E-mail: egon AT heaven DOT industries DOT cz