When you mark a method in a base class as virtual, it signals that it can be overridden in any derived class. The derived class then uses the override keyword to provide its implementation of the method. Overri
Using references or pointers allows you to work with the polymorphic behavior of abstract classes, enabling the invocation of overridden functions in derived classes through the base class reference or pointer. Abstract classes can contain both pure virtual functions and concrete (implemented) methods. ...
5. Memory Management When using inheritance and dynamic memory allocation, virtual destructors are vital for proper memory management. Overriding the destructor in derived classes ensures that resources allocated by the base and derived classes are correctly deallocated, which prevents memory leaks and ens...
}A virtual function in C++ is a function in a base class that can be overridden in derived classes. The key feature of virtual functions is that they enable polymorphism, allowing a derived class to provide a specific implementation of a function that is already defined in its base class....
Here, void print() override; is the function prototype in the Derived class. The override specifier ensures that the print() function in Base class is overridden by the print() function in Derived class.If we use function prototype in Derived class, then we use override specifier in the ...
A deleted function can only be overridden by deleted functions, and a non-deleted function can only be overridden by non-deleted functions. If string-literal is present, the implementation is encouraged to include the text of it as part of the resulting diagnostic message which shows the ...
Virtual can be both public and private where public can be accessed using an object or pointer but private cannot be accessed directly but it can still be inherited and overridden in the derived class. Constructors, Static, and Friend Functions cannot be virtual.Print...
In this case when a pointer of the base class is defined in a main() function and derived class object’s address is passed on to the base class pointer, then calling the overridden function will invoke the derived class member function and not the base class member function as mentioned ...
The function overridden in the derived class is called from the base class constructor! When the virtual method is called from the constructor, the run-time type of the created instance is taken into account. The virtual call is based on this type. The method is called in the base type co...
IMHO, allowing them to point to overridden functions was a tragic mistake. As payment for this rarely-used extra functionality, member function pointers became grotesque. They also caused headaches for the compiler writers who had to implement them. Implementations of Member Function Pointers So, ...