Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!wuarchive!udel!haven!adm!smoke!gwyn
From: gwyn@smoke.brl.mil (Doug Gwyn)
Newsgroups: comp.lang.c
Subject: Re: Question with cpp and token pasting
Message-ID: <15030@smoke.brl.mil>
Date: 31 Jan 91 18:47:07 GMT
References: <1991Jan30.232740.1697267@locus.com>
Organization: U.S. Army Ballistic Research Laboratory, APG, MD.
Lines: 21

In article <1991Jan30.232740.1697267@locus.com> bringo@locus.com (Bob Ringo) writes:
>Hi, this is probably a simple task, but I haven't figured it out.
>I'd like to do the following:
>#define A "Good"
>#define B "Morning"
>#define C   /* the concatenation of A and B */

This is an ill-defined requirement..

>--I tried the following, but it didn't work.
>#define paste(x,y)  x ## y
>#define A "Good"
>#deifne B "Morning"
>#define C paste(A,B)

I suppose for your purposes the following would suffice:
#define A "Good"
#define B "Morning"
#define C (A B)
Note that string-literal splicing is a new feature with ANSI C and
that it occurs AFTER the preprocessing phases.