What are the best practices for using polymorphism in C++?

What are the best practices for using polymorphism in C++?

Polymorphism in C++ allows methods to do different things based on the object it is acting upon. Best practices include using virtual functions, ensuring proper use of destructors, and favoring composition over inheritance.

Can you explain why using virtual destructors is important?

Using virtual destructors is crucial because it ensures that the destructor of the derived class is called when an object is deleted through a base class pointer, preventing resource leaks.

What are some common pitfalls to avoid with polymorphism?

Common pitfalls include slicing, not using virtual destructors, and excessive reliance on inheritance instead of composition. It's important to understand the implications of each.

How can I effectively manage memory with polymorphic classes?

To manage memory effectively, use smart pointers like std::unique_ptr or std::shared_ptr to handle object lifetimes automatically and avoid memory leaks.