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(string Name, double YearlySalary)

    {

        NAME = Name;

        YEARLYSALARY = YearlySalary;

    }

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

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

    //Input: string strType

    //Output: return a double type 

    public double CalculateSalary(string strType)

    {

    //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

        if (strType == "month")

            return YEARLYSALARY/12;

        else if (strType == "quarter")

            return YEARLYSALARY/4;

        else if (strType == "year")

            return YEARLYSALARY;

        else 

            return YEARLYSALARY;

    }

​

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

    public string GetFirstThreeLetter()

    {

    //Get first three letter from employee's name

    //Input: no

    //Output: return a string

    //Hint: use substring() & NAME variable

        return NAME.Substring(0,3);

    }

}

public class Program

{

    public static void Main()

    {

        //5. [Code] Create an Employee object

        //NAME = John; YEARLYSALARY = 75000

        Employee Employee1 = new Employee("John",75000);

​

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

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

        Console.WriteLine(Employee1.GetFirstThreeLetter());

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

        Console.WriteLine(Employee1.CalculateSalary("month"));

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

        Console.WriteLine(Employee1.CalculateSalary("quarter"));        

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

        Console.WriteLine(Employee1.CalculateSalary("year"));       

    }

}