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Can virtual functions be protected?
Now in the case where the virtual method needs to super-message its base class’ corresponding virtual method such as say a Save method – which has to pass through all virtual methods in the chain of inheritance in order to save data corresponding to each level of derivation – we have no option but to use a protected …
Can virtual function be defined in base class?
Virtual functions cannot be static members. They are accessed through object pointers. They can be a friend of another class. A virtual function must be defined in the base class, even though it is not used.
How are virtual functions accessed?
Virtual functions should be accessed using pointer or reference of base class type to achieve run time polymorphism. The prototype of virtual functions should be the same in the base as well as derived class. They are always defined in the base class and overridden in a derived class.
Can a class have virtual functions?
Because virtual functions are called only for objects of class types, you cannot declare global or static functions as virtual . The virtual keyword can be used when declaring overriding functions in a derived class, but it is unnecessary; overrides of virtual functions are always virtual.
What is the use of virtual private functions?
C++ has access control, but not visibility control. This means that private functions are visible but not accessible. A private virtual function can be overridden by derived classes, but can only be called from within the base class.
Can we override private virtual methods?
You can’t declare private virtual methods because there’s no point (since there’d be no way to override them)… But you can override protected virtual methods.
Can you override private virtual methods?
Can pure virtual functions be private?
Answer 1: It’s not allowed. A private function is not visible to derived classes and they cannot override it. A pure virtual function is used to declare a interface without implementation. Therefore, it does not make sense to declare it as private.
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