Visual Basic 2005 for Programmers: Deitel Developer Series, Second Edition

11.5. Case Study: Payroll System Class Hierarchy Using Polymorphism

This section reexamines the CommissionEmployee–BasePlusCommissionEmployee hierarchy that we explored in Section 10.4. Now we use an abstract method and polymorphism to perform payroll calculations based on the type of employee. We create an enhanced employee hierarchy to solve the following problem:

A company pays its employees on a weekly basis. The employees are of four types: Salaried employees are paid a fixed weekly salary regardless of the number of hours worked, hourly employees are paid by the hour and receive overtime pay (1.5 times the regular hourly salary) for all hours worked in excess of 40 hours, commission employees are paid a percentage of their sales, and base-plus-commission ...