public static void Run(string[] args)
{
// Single Dispatch
Vehicle vehicle = new Vehicle();
Vehicle benz = new Benz();
Sales sales = new Sales();
Console.WriteLine("Visitor Single Dispatch Demo:");
Console.WriteLine($"Sales: The rate for common vehicle is: {sales.GetDiscountRate(vehicle)}");
Console.WriteLine($"Sales: The rate for benz is: {sales.GetDiscountRate(benz)}");
// Double Dispatch (fail)
SalesManager salesManager = new SalesManager();
Console.WriteLine("Visitor Double Dispatch Demo(失敗的例子):");
Console.WriteLine($"SalesManager: The rate for common vehicle is: {salesManager.GetDiscountRate(vehicle)}");
Console.WriteLine($"SalesManager: The rate for benz is: {salesManager.GetDiscountRate(benz)}");
}
public override double GetBaseDisountRate(SalesManager sales)
{
return(0.06 * 1.1);
}
public virtual double GetBaseDisountRate(SalesManager sales)
{
return(0);
}
