using System;

public class Employee

{

    // Create three properties for employee; Use Auto-Implementation

    public string Name { set; get; }

    public string Title { set; get; }

    public int Age { set; get; }

​

    // Create base constructor (without any parameters)

    public Employee()

    {

    }

​

    // Create constructor with three parameters and set up the value for Name, Title, and Age

    public Employee(string n, string t, int a)

    {

        Name = n;

        Title = t;

        Age = a;

    }

​

    // Create a function

    // Function name: ShowDetail

    // Input: N/A 

    // Output: string

    // Rule: return Title + ": " + Name

    public string ShowDetail()

    {

        string strReturn = "";

        strReturn = Title + ": " + Name;

        return strReturn;

    }

}

​

    // [Code] Create a Class "Staff" that inherits from the Class Employee

    public class Staff : Employee

    {

    // 1. Create one property for Staff: double DailyWage

    public double DailyWage { get; set; }

    // 2. Create base constructor without any parameters.

    public Staff()

    {

    }

    // 3. Create second constructor with four parameters and set up the value for Name, Title, Age, and DailyWage

    public Staff(string name, string title, int age, double dailywage)

    {

        Name = name;

        Title = title;

        Age = age;

        DailyWage = dailywage;

    }

    // 4. [Code] Create a function

    //    Function name: CalculateTotalWage

    //    Input: int nDays, bool bExtraBonus

    //    Output: double

    //    Rule:

    //    (a) return total wage = # days * daily wage

    //    (b) if bExtraBonus is true

    //    (b.1) Add 1000 to total wage for age > 60

    //    (b.2) Add 500 to total wage for other cases

    public double CalculateTotalWage(int nDays, bool bExtBonus)

    {

        double totalwage = nDays * DailyWage;

        if (bExtBonus) 

        {

            totalwage += (Age > 60) ? 1000 : 500;

        }   

        return totalwage;

    }

}

​

​

    // [Code] Create a Class "Manager" that inherits from the Class Employee

    public class Manager : Employee

    {

    // 1. Create one property for Manager: double YearlyWage

    public double YearlyWage { get; set; }

    // 2. Create base constructor without any parameters

    public Manager ()

    {

    }

    // 3. Create second constructor with four parameters and set up the value for Name, Title, Age, and YearlyWage

    public Manager(string name, string title, int age, double yearlywage)

    {

        Name = name;

        Title = title;

        Age = age;

        YearlyWage = yearlywage;

    }

​

    // 4. Create a function 

    //    Function name: ShowDetail (hide the parent function)

    //    Input: N/A 

    //    Output: string

    //    Rule: return Title + "(manager): " + Name

    public new string ShowDetail()  

    {

        string stroutput = "";

        stroutput = Title + "(manager): " + Name;

        return stroutput;

    }

    // 5.Create a function

    //    Function name: CalculateTotalWage

    //    Input: bool bExtraBonus

    //    Output: double

    //    Rule:

    //    (a) return total wage = YearlyWage

    //    (b) if bExtraBonus is true, add 3000 

        public double CalculateTotalWage(bool bExtBonus)

    {

        return bExtBonus ? (YearlyWage + 3000) : YearlyWage;

    }   

}

​

public class Program

{

    public static void Main()

    {

        // 1.1 [Code] Create a staff by using the second contructor

        // Name: John; Title: Specialist; Age: 28; DailyWage: 120

        Staff staff1 = new Staff("John", "Specialist", 28, 120);

        Console.WriteLine(staff1.Name);

​

        // 1.2 [Question] Can you show the newly created staff's name? Y/ N

        // Ans: Y

        // Why: because Name is a public inherited property

​

​

        // 1.3 [Question] Can you show the newly created staff's title? Y/ N

        Console.WriteLine(staff1.Title);

        // Ans: Y

        // Why: because Title is a public inherited property

​

        // 1.4 [Code] Call ShowDetail and use Console.WriteLine() to show the results

        Console.WriteLine(staff1.ShowDetail());

​

​

        // 1.5 [Code] Call this staff's CalculateTotalWage

        Console.WriteLine(staff1.CalculateTotalWage(120, true));

        // nDays: 250; bExtraBonus: true

        // What is the result?

        // Ans: 14900

​

        // 2.1 [Code] Create a manager here

        // Name: Mary; Title: Manager; Age: 42; YearlySalary: 78500

        Manager manager1 = new Manager("Mary", "Manager", 42, 78500);

​

​

        // 2.2 [Code] Call ShowDetail and use Console.WriteLine() to show the results

        Console.WriteLine(manager1.ShowDetail());

        // [Question] Why is the result different from staff's result?

        // Why: the class is different and only the method on the derived class matters

​

​

        // 2.3 [Code] Call this manager's CalculateTotalWage

        Console.WriteLine(manager1.CalculateTotalWage(true));

        // bExtraBonus: true

        // What is the result?

    }

}