C++ Polymorphism and Virtual Member Functions [6]

Рет қаралды 10,178

Жыл бұрын

In object-oriented programming, polymorphism enables object reference variables or pointers to reference objects of different types, and to invoke the appropriate member functions based on the type of object being referenced.
Learn how through writing sample classes in this C++ tutorial for beginners written with Visual Studio 2022 C++ .
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Пікірлер: 19

@orionpluto1214 2 ай бұрын

The best explanation I've found on this subject, thank you very much !

@saramomen2161 7 ай бұрын

You explained too well. Tomorrow is my exam and I understood the topic completely. Thank you.

@ProfessorHankStalica 7 ай бұрын

Glad it helped!

@dwivedys 2 ай бұрын

Absolutely wonderful!

@Johannes-vr3vc 4 ай бұрын

Some time ago, when I used g++, I could type something like this: Square *s = (class Square*)&r; I think this will probably still work and maybe it explains things better.

@menachemlevi 5 ай бұрын

amazing keep going

@ProfessorHankStalica 5 ай бұрын

Thank you, I will

@bashiraddean-mufarreh Жыл бұрын

im first watching 🤓first like 👍🏻

@AlexTrouman-oi1yp 7 ай бұрын

Mr.Hank please what is the difference betwen ~square(){}; and virtuel ~square(){}; .Thanks for your explanation

@ProfessorHankStalica 7 ай бұрын

It's the difference between using static binding and dynamic binding. If you want C++ to decide which method to use at runtime, you use dynamic binding (virtual), otherwise you use static binding. Sometimes C++ has to decide which destructor to use at run time. Basically, if you expect your class will ever be inherited from, you should make the destructor virtual.

@manedurphy 10 ай бұрын

class Foo { void print() const { cout

@ProfessorHankStalica 10 ай бұрын

It means that the print() function can not contain any code that modifies class member variables. If print were to try, the compiler will give you an error at compile time. For example, class Foo { int x; void print() const { x = 0; cout

@manedurphy 10 ай бұрын

@@ProfessorHankStalica thank you for explaining. new subscriber 🤝

@user-hq2pc5yz6p 6 ай бұрын

what if we did r.print()

@massimoazzano 5 ай бұрын

I like you use a geometric example, people like me can visualize the proposed problem, meaning and scope!

@egetan9247 6 ай бұрын

Sir , I did not understand something , which is ; Why we put virtual for all destructors meanwhile put virtual for only base class's print function . Thank you for considering :)

@ProfessorHankStalica 6 ай бұрын

You use virtual on methods that you expect will be overridden in child classes. If there is a chance your class gets inherited from, then it's a good practice to make destructors virtual. That way, if the classes get used in a polymorphic context, you ensure the correct destructor is executed for each object.

@egetan9247 6 ай бұрын

@@ProfessorHankStalica thank you so much.. :)