inherit_prob.cpp

#include <iostream>

using namespace std;

class base
{
public:
  base():m_base(0)
	{
		cout << "base created" << endl;
	}
	virtual void bar() = 0;
protected:
	void foo()
	{
		cout << "foo()" << endl;
	}
	int m_base;
};

template<class T> class derived1 : public base
{
public:
	derived1():base()
	{
		cout << "derived1 created" << endl;
	}
	virtual void bar()
	{
		foo();
		cout << "bar" << endl;
	}
	virtual void foobar() = 0;

};

template<class T> class derived2 : public derived1<T>
{
public:
	derived2():derived1<T>()
	{
		cout << "derived2 created" << endl;
	}
	virtual void foobar()
	{
		base::foo();
		derived1<T>::bar();
		cout << base::m_base << endl; // this works
    		// cout << m_base << endl; // this doesn't
	}
};

template class derived1<int>;
template class derived2<int>;

int main(int argc, char** argv)
{
	derived2<int>* tmp=new derived2<int>();
	tmp->foobar();
	return 0;
}