using System;

​

public class Employee

{

     // 1. [Code] (string) Create a public string field (NAME)

    public string NAME;

​

    // 2. [Code] (double) Create a private field (_yearlysalary) and a public properties (YEARLYSALARY)

    // Rule: yearly salary should not be negative. If the value is negative, set default value as 36000

    private double _yearlySalary;

    public double YEARLYSALARY

    {

        get 

        { 

            return _yearlySalary;

        }

        set

        { 

            if (value < 0)

            {

                _yearlySalary = 36000;

            }

            else

            {

                _yearlySalary = value;

            }

        }

    }

​

    // Constructor

    public Employee()

    {

    }

​

    // 3. [Code] Create a function: CalculateSalary()

    // Get (monthly, quarterly, or yearly) salary

    // Input: string strType

    // Output: return a double type

    // if strType equals to "month", return monthly salary (monthly salary = yearly salary / 12)

    // if strType equals to "quarter", return quarterly salary (quarterly salary = yearly salary / 4)

    // if strType equals to "year", return yearly salary

    public double CalculateSalary(string strType)

    {

        switch (strType)

        {

            case "month":

                return YEARLYSALARY / 12;

            case "quarter":

                return YEARLYSALARY / 4;

            case "year":

                return YEARLYSALARY;

            default:

                return 0;

        }

    }

​

    // 4. [Code] Create a function: GetFirstThreeLetter()

    // Get first three letter from employee's name

    // Input: no

    // Output: return a string

    // Hint: use substring() & NAME variable

    public string GetFirstThreeLetter()

    {

        if (NAME.Length >= 3)

            return NAME.Substring(0,3);

        else

            return NAME;

    }

}

​

public class Program

{

    public static void Main()

    {

        // 5. [Code] Create an Employee object

        // NAME = John; YEARLYSALARY = 75000

        Employee employee = new Employee();

        employee.NAME = "John";

        employee.YEARLYSALARY = 75000;

​

        // 6. [Code] Call object's function

        // Call GetFirstThreeLetter() function and print out the information.

        // Call CalculateSalary("month") function and print out the information.

        // Call CalculateSalary("quarter") function and print out the information.

        // Call CalculateSalary("year") function and print out the information.

        Console.WriteLine("First three letters of employee's name: " + employee.GetFirstThreeLetter());

        Console.WriteLine("Monthly salary: " + employee.CalculateSalary("month"));

        Console.WriteLine("Quarterly salary: " + employee.CalculateSalary("quarter"));

        Console.WriteLine("Yearly salary: " + employee.CalculateSalary("year"));

    }

}