Let's say I've got

class A
{
virtual void sub();
void doSomething()
{
sub();
}
};

class B: public A
{
void sub()
{
printf("Hello.");
}
};

Is there a way to make this arrangement work? Currently, it's causing linker errors; and if I mark sub() as non-virtual in A, it tries to execute that when I call B::doSomething() rather than B's sub().