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 defval = 36000;

            if (value < 0) {

                Console.WriteLine("Warning: The given YearlySalary value {0} cannot be negative. It is set to {1}", value, defval);

                _yearlysalary = defval;

            }

            else _yearlysalary = value;

        }

    }

    // Constructor

    public Employee()

    {

    }

    // 3. [Code] Write a function: 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

    public double CalculateSalary(string strType)

    {

        double val = YearlySalary;

        switch (strType)

        {

            case "month" :

                val = YearlySalary / 12;

                break;

            case "quarter" :

                val = YearlySalary / 4;

                break;

            case "year" :

                // val = YearlySalary;

                break;

            default:

                Console.WriteLine("Salary method {0} does not exist", 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()

    {

        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

        // Name (John); YearlySalary (75000)

        Employee emp = new Employee();

        emp.Name = "John";

        emp.YearlySalary = 75000;

​

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

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

        Console.WriteLine(emp.GetFirstThreeLetters());      

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

        Console.WriteLine(emp.IsEmployeeManager());

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

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

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

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

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

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

        Console.WriteLine(emp.CalculateSalary("week"));

    }

}