コード例 #1
0
    public static void Main(string[] args)
    {
        SalariedEmployee salariedEmployee =
            new SalariedEmployee("John", "Smith", "111-11-1111", 800.00M);
        HourlyEmployee hourlyEmployee =
            new HourlyEmployee("Karen", "Price",
                               "222-22-2222", 16.75M, 40.0M);
        CommissionEmployee commissionEmployee =
            new CommissionEmployee("Sue", "Jones",
                                   "333-33-3333", 10000.00M, .06M);
        BasePlusCommissionEmployee basePlusCommissionEmployee =
            new BasePlusCommissionEmployee("Bob", "Lewis",
                                           "444-44-4444", 5000.00M, .04M, 300.00M);

        Console.WriteLine("Employees processed individually:\n");

        Console.WriteLine("{0}\nearned: {1:C}\n",
                          salariedEmployee, salariedEmployee.GetPaymentAmount());
        Console.WriteLine("{0}\nearned: {1:C}\n",
                          hourlyEmployee, hourlyEmployee.GetPaymentAmount());
        Console.WriteLine("{0}\nearned: {1:C}\n",
                          commissionEmployee, commissionEmployee.GetPaymentAmount());
        Console.WriteLine("{0}\nearned: {1:C}\n",
                          basePlusCommissionEmployee,
                          basePlusCommissionEmployee.GetPaymentAmount());

        // create four-element Employee array
        Employee[] employees = new Employee[4];

        // initialize array with Employees of derived types
        employees[0] = salariedEmployee;
        employees[1] = hourlyEmployee;
        employees[2] = commissionEmployee;
        employees[3] = basePlusCommissionEmployee;

        Console.WriteLine("Employees processed polymorphically:\n");

        // generically process each element in array employees
        foreach (Employee currentEmployee in employees)
        {
            Console.WriteLine(currentEmployee); // invokes ToString

            // determine whether element is a BasePlusCommissionEmployee
            if (currentEmployee is BasePlusCommissionEmployee)
            {
                // downcast Employee reference to
                // BasePlusCommissionEmployee reference
                BasePlusCommissionEmployee employee =
                    (BasePlusCommissionEmployee)currentEmployee;

                employee.BaseSalary *= 1.10M;
                Console.WriteLine(
                    "new base salary with 10% increase is: {0:C}",
                    employee.BaseSalary);
            } // end if

            Console.WriteLine(
                "earned {0:C}\n", currentEmployee.GetPaymentAmount());
        } // end foreach

        //get type name of each object in employees array
        for (int j = 0; j < employees.Length; j++)
        {
            Console.WriteLine("Employee {0} is a {1}", j,
                              employees[j].GetType());
        }

        Console.WriteLine("-------------------------------------------------");

        // create derived class objects
        IPayable[] payableObjects = new IPayable[8];
        payableObjects[0] = new SalariedEmployee("John", "Smith", "111-11-1111", 700M);
        payableObjects[1] = new SalariedEmployee("Antonio", "Smith", "555-55-5555", 800M);
        payableObjects[2] = new SalariedEmployee("Victor", "Smith", "444-44-4444", 600M);
        payableObjects[3] = new HourlyEmployee("Karen", "Price", "222-22-2222", 16.75M, 40M);
        payableObjects[4] = new HourlyEmployee("Ruben", "Zamora", "666-66-6666", 20.00M, 40M);
        payableObjects[5] = new CommissionEmployee("Sue", "Jones", "333-33-3333", 10000M, .06M);
        payableObjects[6] = new BasePlusCommissionEmployee("Bob", "Lewis", "777-77-7777", 5000M, .04M, 300M);
        payableObjects[7] = new BasePlusCommissionEmployee("Lee", "Duarte", "888-88-888", 5000M, .04M, 300M);

        SortSSNDelegate sortDelegate = new SortSSNDelegate(Employee.CompareSSN);  //delegate points to method.
        bool            key          = true;

        while (key)
        {
            Console.WriteLine(Environment.NewLine + "1.Sort last name in ascending order using IComparable");
            Console.WriteLine("2.Sort pay amount in descending order using IComparer");
            Console.WriteLine("3.Sort by social security number in asc order using selection sort & DELEGATE");
            Console.WriteLine("Press 4 anytime to Exit." + Environment.NewLine);
            int value = Int32.Parse(Console.ReadLine());
            switch (value)
            {
            case 1: Console.WriteLine("<Sorting Last Name using IComparABLE>");
                Array.Sort(payableObjects);
                PrintArrayElements(payableObjects);
                break;

            case 2: Console.WriteLine("\n\n<Sort payment amount in desc using ICompaRER>");
                Array.Sort(payableObjects, new PaymentAmountDesc());
                PrintArrayElements(payableObjects);
                break;

            case 3: Console.WriteLine("\n\n<Sort based on SSN in Ascending order>");
                SelectionSortMethod(payableObjects as object, sortDelegate, true);       // Call method. 'true' for ascending.
                PrintArrayElements(payableObjects);
                break;

            default: key = false;
                break;
            }
        } // end Main
    }