C++ virtual destructor
Feb 23, 2021
virtualneeded if you are writing a class with inheritance in mind.
The problem of a class without a virtual destructor
As you can see, memory is allocated but never deallocated!!
The reason is, when derived get deleted, it does not know if the destructor of Derived should be called or not!
Solution
To hint that its derived class’ destructor needs to be called, you need to add virtual in front of Base class’ destructor.
result
Summary
If you design a class that will be inherited, you should have a virtual destructor.
