/**
   Example from Core Java 8th edition by Horstmann and Cornell 
 */ 
public class Employee extends Person {
    public Employee(String n, double s){
	super(n);
	salary = s; 
    }

    public double getSalary() {
	return salary; 
    }

    // abstract method defined
    public String getDescription() {
	return "an employee with a salary of " + salary ;
    }

    public void raiseSalary(double byPercent){
	double raise = salary * byPercent / 100 ; 
	salary += raise ;
    }

    private double salary; 
}