From: "Adrian Smith" <Adrian AT atpelectronics DOT connectfree DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
References: <39535e20 AT news DOT telinco DOT net>
Subject: Re: Pointers and Arrays (Newbie)
Date: Tue, 27 Jun 2000 10:56:30 +0100
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Sorry to be a pain, but I thought I'd solved the problem when I hadn't.
I've realised where the problem lies but I can't work out why.

The problem is, I've got two <.cpp> files which both use the same <.h>
header file. The header file contains  :-

(filename - test.h)

#ifndef TEST_H
#define TEST_H

void show(void);
const char * message = "This is a message";

#endif

The two .cpp files are as follows :-

(filename test.cpp)

#include <stdio.h>
#include <iostream.h>
#include "test.h"


int main(void)
{
   show();
   cout << message << endl;

}

(filename test2.cpp)

#include "test.h"
#include <iostream.h>


void show(void)
{
    cout << message << endl;

}

Using Rhide these two .cpp files will compile perfectly o.k. but when you
try to link them into  test.exe they complain of this multiple defenition
error as mentioned in the previous post. Using an array of chars

ie. const char message[30] = "This is a message".
 in the header file seems to work fine ??

The solution is probably obvious - if so could somebody tell me what's up .
                                                        Thanks.


Adrian Smith <Adrian AT atpelectronics DOT connectfree DOT co DOT uk> wrote in message
news:39535e20 AT news DOT telinco DOT net...
> Can anybody help me ?
>
> My program has a header file  in which I've got  :-
>
> const char * message = "This is an error message \n"
>
> In the main .cpp file I've got :-
>
> cout << message << endl;
>
> When i try to compile, it comes up with:-
>
> error :<filename.cpp> :  multiple defenition of 'message'
>
> If i use an array - ie, const char message[30] = "This is an error message
> \n"
> this works perfectly. Could somebody please tell me where Iam going wrong
> with the pointer method.
>
>                                             Many thanks.
>
>
>