public override string ship(Shipper shipper)
{
string rval = base.ship(shipper);
return(rval + "**MARK RETURN RECEIPT REQUESTED**");
}
public override string ship(Shipper shipper)
{
string rval = base.ship(shipper);
return(rval + "**MARK FRAGILE**");
}
public override string ship(Shipper shipper)
{
string rval = base.ship(shipper);
return(rval + "**MARK DO NOT LEAVE IF ADDRESS NOT AT HOME**");
}
protected override double calculateCost(double weight, Shipper shipper)
{
return(0);
}
public override string ship(Shipper shipper)
{
return(nextShipment.ship(shipper));
}
protected override double calculateCost(double weight, Shipper shipper)
{
return(shipper.GetPackageCost(weight) + shipper.GetOversizeSurcharge(weight));
}
protected override double calculateCost(double weight, Shipper shipper)
{
return(shipper.GetPackageCost(weight)); //have different method for different sizes rather than passing in parameters
//open for extension not modification
}
// protected = only available in this class and derived classes //virtual = can be overridden //the derived Shipper class can be passed to an instance of the Shipper class as it implements all of its properties. protected abstract double calculateCost(double weight, Shipper shipper); //delegating implementation to sub classes