using System;

​

public class Employee

{

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

    public string strNAME;

​

    //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 = value;

            }

            else {

                _yearlysalary = 36000;

            }

        }

    }

    //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)

    {

        double dRet = 0;

        if (strType == "month")

        {

            dRet = YEARLYSALARY/12;

            return dRet; 

        }

        if (strType == "quarter")

        {

            dRet = YEARLYSALARY/4;

            return dRet; 

        }

        else if (strType == "year")

        {

        dRet = YEARLYSALARY;

        return dRet; 

    }

        return dRet;

    }

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

        public string GetFirstThreeLetter(){

            return strNAME.Substring(0,3);

        }

}

public class Program

{

    public static void Main()

    {

        //5. [Code] Create an Employee object

        //NAME = John; YEARLYSALARY = 75000

        Employee employee1 = new Employee();

        employee1.strNAME = "John";

        employee1.YEARLYSALARY = 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.

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

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

    }

}