Path: csiph.com!eternal-september.org!feeder.eternal-september.org!reader01.eternal-september.org!.POSTED!not-for-mail From: Keith Thompson Newsgroups: comp.lang.c Subject: Re: what does # mean? Date: Sat, 08 Feb 2020 13:38:29 -0800 Organization: None to speak of Lines: 26 Message-ID: <87eev4220a.fsf@nosuchdomain.example.com> References: <6dcd71aa-6b41-4193-8d53-813dbc198686@googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain Injection-Info: reader02.eternal-september.org; posting-host="d79a1035c6f8abb274c59d391f180cbc"; logging-data="419"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/cgHoRTLTWDUnHiIW33jTp" User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) Cancel-Lock: sha1:t2TiZRIWeOTVBWd8VijDaZ4hRho= sha1:6A2LbmWZdN2X4imq9YLTK96e9to= Xref: csiph.com comp.lang.c:149866 scott@slp53.sl.home (Scott Lurndal) writes: > James Kuyper writes: >>On Friday, February 7, 2020 at 8:26:13 PM UTC-5, T wrote: >>> Hi All >>> >>> what does the "#" in >>> >>> #define GDK_SELECTION_SECONDARY GDK_MAKE_ATOM (2) >>> >>> mean? >>> >>> And is "define" what others call a constant? >> >>The # does not mean anything on it's own, > > Although to be strictly pedantic, in the days of early > C compilers, the C pre-processor would only be run if > the first byte of the source file was '#'. One often > saw source files where the first line was a naked octothorpe. And a # on a line by itself is a "null directive". It has no effect. -- Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com Working, but not speaking, for Philips Healthcare void Void(void) { Void(); } /* The recursive call of the void */