The derived class inherits the functionality of the base class (subject to the access level of the methods), so a base class method can be called through an object of the derived class. The derived class can implement a method with the same prototype as the base class method, in which case the base class method is overridden by the derived class method and the derived class provides the functionality. A derived class will often override a base class method to provide functionality that is specific to the derived class; however, it can call the base class method by calling the method using the name resolution operator:
struct base { void f(){ /* do something */ } void g(){ /* do something */ } }; 
