static variables in namespace/classes

[cppuser]

Hello,
is it true that if you have the following :

//Header file .. myNameSpace.h

namespace myNameSpace {
   static int iMyInt = 0;
};

and if you include that header into multiple files you'll get multiple variables ? Why ?

And is this the same for the classes, for instance if we have

class myClass {
public:
static int iMyInt = 0;
}


Thank you

[cppuser]

And is it supported at all to initialize it with zero there ?

namespace myNameSpace {
   static int iMyInt = 0;
};

Or do I have to do like this :

namespace myNameSpace {
   static int iMyInt;
};

and after that initialize it in .cpp ?

[kbw]

It's no different from putting

namespace myNameSpace {
   static int iMyInt = 0;
};

in every source file.

Do you understand what including a header file does? It just copies all the code in the header file into the cpp file.

[chrisname]

To add to that you can't initialize variables in a class. That's what constructors are for.

[cppuser]

Yes, I have just read about that...

But if we set inclusion guards in the header, why it still keeps entering (copying all the code from the header) ?