when more than one derived class are created from a single base class, then that inheritance is called as hierarchical inheritance. Inheritance also be used to support to the hierarical design program.Many programming problem can be cast into a hierarchy where certain features of one level are shared by many other level.In c++ many problems can be converted into class hierarchies.The base class will include all the features common to the subclasses.A subclass can be constructed by inheriting the properties of base class