Multiple definition of static variable

[unstoppy]

How can I use static variable? Everytime I compile I get an error: multiple definition.

If I use one file for everything it works. But when I seperate it into .h and .cpp file i get this error.

//apple.h file

class Apple{
public:
	Apple();
	static int weight;
	void cut();

};

int Apple::weight;

//apple.cpp file
#include <iostream>
#include "apple.h"
using namespace std;

Apple::Apple()
{

}

void Apple::cut()
{
    cout << Apple::weight << endl;
}

//main.cpp
#include <iostream>
#include "apple.h"
using namespace std;

int main()
{
    Apple app;
    app.cut();
}

[coder777]

move line 11 to apple.cpp

[unstoppy]

won't work

[maeriden]

What error does it give you if you move line 11 to the cpp file?

What do you do to compile?

[unstoppy]

the same error: multiple definition.
But I have actually fixed it by moving it to main.cpp

[Disch]

It shouldn't matter what cpp file its in, as long as it's only in 1 cpp file.

You aren't #including cpp files in other cpp files, are you?

[unstoppy]

Nope. You can see all in includes in my code above. I think the reason of that error is "apple.h" is included twice, once in apple.cpp and once in main.cpp. That's why it is redefined I guess.

[Disch]

Yes.... having it in apple.h would have the redefined error for the reason you describe. That is correct.

However having it in apple.cpp should work just fine.