The aim of this assignment is to demonstrate the use of class, subclass, inheritance, polymorphism and the reusability of classes.

Problem description

Consider a company that has many employees. The job titles of employees are Worker, Manager and Director. At the end of the year the company declares its best worker, manager and director based on some performance criteria. You have to write a program that takes information about the employees from the keyboard, finds the best worker, manager and director, and print their names on screen.

Assumption: mangers and directors are basically the same. Directors are involved in large projects and their performance is calculated differently from managers.

Use the following hints:

• All the workers, managers and directors are the employees of the company. They must have some common basic information, e.g., employee id, name, age, tax file number, job title etc. regardless of their job positions. So Employee can be a class and it can be extended to write Worker, Manager and Director classes.
• Worker class can be subclass of Employee class. See Worker class for calculating performance index of each worker.
• Similarly Manager class can be a subclass of Employee class.
• Crate Director class. The only difference between manager and director is the way their performance is calculated. So Director can be a subclass of Manager.
• Create a class Award that will print the best worker, manager and director. You should use the concept of polymorphism here. The output of the program should be something like this.