// Fig. 11.6: HourlyEmployee.cs
// HourlyEmployee class that extends Employee.
public class HourlyEmployee : Employee
{
   private decimal wage; // wage per hour
   private decimal hours; // hours worked for the week

   // five-parameter constructor
   public HourlyEmployee( string first, string last, string ssn,
      decimal hourlyWage, decimal hoursWorked )
      : base( first, last, ssn )
   {
      Wage = hourlyWage; // validate hourly wage via property
      Hours = hoursWorked; // validate hours worked via property
   } // end five-parameter HourlyEmployee constructor

   // property that gets and sets hourly employee's wage
   public decimal Wage
   {
      get
      {
         return wage;
      } // end get
      set
      {
         wage = ( value >= 0 ) ? value : 0; // validation
      } // end set
   } // end property Wage

   // property that gets and sets hourly employee's hours
   public decimal Hours
   {
      get
      {
         return hours;
      } // end get
      set
      {
         hours = ( ( value >= 0 ) && ( value <= 168 ) ) ?
                 value : 0; // validation
      } // end set
   } // end property Hours

   // calculate earnings; override Employee's abstract method Earnings 
   public override decimal Earnings()
   {
      if ( Hours <= 40 ) // no overtime
         return Wage * Hours;
      else
         return ( 40 * Wage ) + ( ( Hours - 40 ) * Wage * 1.5M );
   } // end method Earnings

   // return string representation of HourlyEmployee object
   public override string ToString()
   {
      return string.Format( 
         "hourly employee: {0}\n{1}: {2:C}; {3}: {4:F2}",
         base.ToString(), "hourly wage", Wage, "hours worked", Hours );
   } // end method ToString
} // end class HourlyEmployee


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