How do virtual destructors work?

Question

I am using gcc. I am aware how the virtual destructors solve the problem when we destroy a derived class object pointed by a base class pointer. I want to know how do they w

Answer 1

The key thing you need to know is that not using a virtual destructor in the above code is undefined behavior and that's not what you want. Virtual destructors are like any other virtual functions - when you call delete the program will decide what destructor to call right in runtime and that solves your problem.