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From: sridhar@ksuvax1.cis.ksu.edu (Srinivasan Sridhar)
Newsgroups: comp.lang.c++
Subject: Multiple Definitions in Headers
Message-ID: <2283@deimos.cis.ksu.edu>
Date: 10 Jul 89 05:38:36 GMT
Sender: news@deimos.cis.ksu.edu
Reply-To: sridhar@ksuvax1.cis.ksu.edu (Srinivasan Sridhar)
Distribution: usa
Organization: Kansas State University, Dept of Computing & Information Sciences
Lines: 44



I have been having the following problems with my C++ 1.2.
When I try to use a new object of type x, say, that has been 
defined in a header file called x.h.

	1.  Initialized a vector of the class objects in main program
	    segment (function main.c). 

	//main.c
	#include "x.h"
	#include <stream.h>
	main()
	{
		x* x1 = new x[10];
		.....
		..
	}


	2.  Declared x as extern in another file (fun.c)

	//fun.c
	#include "x.h"
	fun()
	{
		extern x  x1;
		x1[0] = x(..ctor);
	}

Now, when I do this, it passes thro' the compilation phase and when
it comes to the loading phase, complains of :

	1. Undefined x1

	2. x being multiply defined (x is overloaded in x.h)
	  (this is after a few ifndef statements in the header and .c
	   files to avoid multiple inclusions of x.h)

Any solutions or suggestions to use objects defined in .h files?  If
stream.h should work, I don't see why my header file structured in the
same manner shouldn't.  Thanks in advance for help.

You can e-mail suggestions to my address: sridhar@ksuvax1.cis.ksu.edu