using System;

​

public class Employee

{

    // 1. [Code] Create a private field (string _name) and a public property (Name)

    private string _name;

    public string Name

    {

        get

        {

            return _name;

        }

        set

        {

            _name = value;

        }

    }

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

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

    private double _yearlySalary;

    public double YearlySalary

    {

        get

        {

            return _yearlySalary;

        }

        set

        {

            const double default_value = 36000;

            if (value < 0) 

            {

                Console.WriteLine("{0} is negative setting Yearly Salary to {1}", value, default_value);

                _yearlySalary = default_value;

            }

            else _yearlySalary = value;

            //one line if statement

            //_yearlySalary = (value < 0) ? default_value : value;

         }

    }

    // Constructor

    public Employee()

    {

    }

    // 3. [Code] Write a function (those are public): CalculateSalary with one string parameter

    // Input Parameter: string strType, will be one of the 3 string values ("month", "quarter", "year")

    // Output: return a double value 

    // 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

    //functions are public

    public double CalculateSalary (string strType)

    {

        double val = 0;

        switch(strType.ToLower())

        {

            case "month":

                //use the property YearlySalary

                val = YearlySalary / 12;

                break;

            case "quarter":

                val = YearlySalary / 4;

                break;

            case "year":

                val = YearlySalary;

                break;

            default:

                Console.WriteLine("Invalid salary parameter {0}", strType);

                break;

        }

        return val;

    }

    // 4. [Code] Write a function: IsEmployeeManager

    // Check whether the employee is a manager or not

    // Input: no

    // Output: return a boolean

    // if employee's salary is greater than 50000, return true; false, otherwise.

    public bool IsEmployeeManager ()

    {

        // don't need to have true or false bc the bool will automatically return that

        return YearlySalary > 50000;    

    }

    // 5. [Code] Write a function: GetFirstThreeLetters

    // Get first three letters from employee's name

    // Input: no

    // Output: return a string

    // Hint: use substring()

    public string GetFirstThreeLetters()

    {

        return Name.Substring(0,3);

    }

}

public class Program

{

    public static void Main()

    {

        // 6. [Code] Create an Employee object

        // Nane (John); YearlySalary (75000)

        Employee person = new Employee();

        person.Name = "Johnny";

        person.YearlySalary = 75000;

        // 7. [Code] Call object's functions

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

        Console.WriteLine(person.GetFirstThreeLetters());

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

        Console.WriteLine(person.IsEmployeeManager());

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

        Console.WriteLine(person.CalculateSalary("Month"));

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

        Console.WriteLine(person.CalculateSalary("Quarter"));

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

        Console.WriteLine(person.CalculateSalary("Year"));

    }

}