error LNK2005 ...killin me!

[jopeters]

My instructor gave me an assignment that involves modifying a class that HE has already prewritten. He gave us the Header, Implementation, and a test app to use that was supposed to be working when we got it. Unfortunately me and one of my friends have both been getting the same error, error LNK2005. I overheard another kid talking about working on it so idk how he got it working but I have yet to find a fix.

Below is the portion of the header that I believe contains the problem, because the error says
"error LNK2005: "public: static unsigned int const bag::CAPACITY" (?CAPACITY@bag@@2IB) already defined in bag_demo.obj"

#ifndef BAG_H
#define BAG_H
#include <cstdlib>  // Provides size_t

    class bag
    { 
    public:
        // TYPEDEFS and MEMBER CONSTANTS
        typedef int value_type;
        typedef std::size_t size_type;
        static const size_type CAPACITY =30;

Here is the implementation of the constant CAPACITY:

#include <algorithm> // Provides copy function
#include <cassert>   // Provides assert function
#include "bag.h"
using namespace std;

const bag::size_type bag::CAPACITY;

If you have any idea please let me know, if you think it might be something else I can post the full header, etc. I tried researching this error but what I found didnt seem to help. When my friend emailed the professor the prof just told him to remove the static from it..which just throws more errors.

[Disch]

Do one of the following:

1) remove the = 30 from the header and put it on line 6 of the cpp file

or

2) remove line 6 from the cpp file


I would do #2 as it's less likely to have other side effects.

[jopeters]

thanks Disch, I removed line 6 from the cpp and it seems to be working fine. I didn't know it could run without that line!