Class Diagram

$-$create a class diagram with atleast $5$ classes

$-$the class diagram should also exhibit the object$-$oriented concepts of polymorphism, inheritance, association and aggregation.

$-$List minimum of $4$ attributes and $4$ methods for each of the classes

$-$The polymorphism aspect of the diagram should also include overriding and overloading

$-$Should also have other object oriented concepts such as abstraction and encapsulation.

Coding

Design and implement a user interface$($console based interface$)$ and also implement the classes using c$++$ based on the class diagram created

Testing

Prepare at least $5$ test cases $($other than the $$login$$ test case sample as it is shown in the Test Case template already$).$

Driver

Implement the driver $($main program$)$ which will test all the classes and methods declared according to the class diagram and test according to the test cases.