test.cc

#include <cstdio>

template <class T>
class B {
public:
	virtual void do_stuff() { printf("B stuff.\n"); }
	virtual ~B() { printf("~B stuff.\n"); }
};

template <class T>
class C : public B<T> {
public:
	virtual void do_stuff() { printf("C stuff.\n"); }
	virtual ~C() { printf("~C stuff.\n"); }
};

int main () {
	B<int>* b = new C<int>();
	b->do_stuff();
	delete b;
}