inheritance and static data

[dave2k]

i need a static bool in each of my derived classes. obviously i cannot stick it in the base class because each of the derived classes needs it's own static bool. the only option i can see is declaring the static bool in each of the derived classes, but this seems to go against being OO.. Any other options?

at the moment i am doing

class Base
{
};

class Derived1 : public Base
{
public:
	static bool m_b;
};

bool Derived1::m_b = false;

class Derived2 : public Base
{
public:
	static bool m_b;
};

bool Derived2::m_b = false;

int _tmain(int argc, _TCHAR* argv[])
{
	Derived1 d1;
	Derived2 d2;

	Derived1::m_b=true;
	Derived2::m_b=false;


	return 0;
}