21.3 Virtual and Nonvirtual Overriding (cont.)

If an object invokes an operation, statically bound:
Employee e("Lisa Lim", 36000); cout << e.annual_income() << "\n"; // Statically bound
If a virtual method is invoked through a pointer or a reference, it is bound dynamically:
Employee* e = new Manager("Sarah Smith", 67000, 2000); cout << e->get_salary() << "\n"; // Static binding, because get_salary is not virtual cout << e->annual_income() << "\n"; // Dynamic binding, because annual_income is virtual