Earlier, we talked about the so-called diamond problem with multiple inheritance, where a class inherits from a single ancestor class via two base classes. When a class inherits from another class, it will get the parent class' data members so that an instance of the derived class is treated as being made up of the base class data members and the derived class data members. If the parent classes are derived from the same ancestor class, they will each get the ancestor class' data members resulting in the final derived classes getting copies of the ancestor class' data members from each parent class:
struct base { int x = 0; }; struct derived1 : base { /*members*/ }; struct derived2 : base { /*members*/ }; struct most_derived ...
