Using multilevel inheritance

Multilevel inheritance is where one class inherits another single class. The inheriting class in turn is inherited by a third class, as shown in the following diagram:

In the preceding diagram, you can see that class B inherits class A and class C, in turn, inherits class B.

The following statement defines multilevel inheritance, where the Result class inherits the Marks class and the Marks class, in turn, inherits the Student class:

class Student:
    class Marks(Student):
        class Result(Marks):

In the preceding statement, Student is the base class and the Marks class inherits the Student class. The Result class inherits the Marks class. Consequently, the instance of the Result class can access the methods and variables of the Marks class, and the instance of the Marks class can access the methods and variables of the Student class.

Getting ready

To understand the concept of multilevel inheritance, let's create an application that will prompt the user to enter...