Order of calling constructors/destructors in inheritance

• Construction always starts with the base class. If there are multiple base classes then, construction starts with the left most base. (side note: If there is a virtual inheritance then it’s given higher preference).
• Then the member fields are constructed. They are initialized in the
  order they are declared
• Finally, the class itself is constructed
• The order of the destructor is exactly the reverse

Irrespective of the initializer list, the call order will be like this:

1. Base class A‘s constructor
2. class B‘s field named a (of type class A) will be constructed
3. Derived class B‘s constructor