Polymorphism

  
class Base
{
public:
virtual ~Base(){}
virtual void Func1() = 0;
};

class Sub : public Base
{
public:
virtual ~Sub() {}
virtual void Func1() { //something }

void Func2() { //something }

};

//Main program


Base* pClass;
pClass = new Sub;

//pClass->Func2(); won''t compile