// HourlyWorker.java
// Definition of class HourlyWorker

public final class HourlyWorker extends Employee {
   private double wage;   //每小時工資
   private double hours;  //每周工作時間

   // Constructor for class HourlyWorker
   public HourlyWorker( String first, String last, 
                        double w, double h )
   {
      super( first, last );   // 調用父類結構函數
      setWage( w );
      setHours( h );
   }
   
   // 確定工資
   public void setWage( double w )
      { wage = ( w > 0 ? w : 0 ); }
   
   // 確定工作時間
   public void setHours( double h )
      { hours = ( h >= 0 && h < 168 ? h : 0 ); }
   
   // 確定計時工人的工資
   public double earnings() { return wage * hours; }
   
   public String toString() 
   {
      return "計時工人: " + super.toString();
   }
}