using System;

//Professor Class

public class Professor

{

    //[Code] Define Fields

    public string ProfessorName;

    private int _Age;

    private string _DegreeType;

​

    //[Code] Define Property Age

    //Make sure Age is between 18 and 70

    //If Age violates the rule, set the default value as 30

    //So public "Age" without underscore, but in main code use same variable name as in fields

    public int Age

    {

        get

        {

            return _Age;

        }

        set

        {

            if (value >= 18 && value <= 70)

            {

                _Age = value;

            }

            else {

                _Age = 30; //Set Default Age

            }

        }

    }

​

    //[Code] Define Property Degree

    //Make sure Degree has at least three letters

    //If Degree violates the rule, set the defaul value as "Master"

    public string DegreeType

    {

        get

        {

            return _DegreeType;

        }

        set

        {

            if (value.Length>=3)

            {

                _DegreeType = value;

            }

            else {

                _DegreeType = "Master"; //Set Default Age

            }

        }

    }

​

​

    //[Code] Constructor

        public Professor()

    {

    }           

}

​

​

//MAIN CODE

​

​

​

public class Program

{

    public static void Main()

    {

        //[Code] Create object ProfessorLiu

        // ProfessorName: Liu

        // Age: 99

        // Degree: PhD

        // Print out name, age, and degree

        Professor Pro1 = new Professor();

        Pro1.ProfessorName = "Liu";

        Pro1.Age = 99; //SO this is "Age" not ._Age

        Pro1.DegreeType = "PhD";

        Console.WriteLine(Pro1.ProfessorName);

        Console.WriteLine(Pro1.Age);

        Console.WriteLine(Pro1.DegreeType);

        Console.WriteLine("=================================");

​

        //[Code] Create object ProfessorJames

        // ProfessorName: James

        // Age: 35

        // Degree: MD

        // Print out name, age, and degree

        Professor Pro2 = new Professor();

        Pro2.ProfessorName = "James";

        Pro2.Age = 35; //SO this is "Age" not ._Age

        Pro2.DegreeType = "MD";

        Console.WriteLine(Pro2.ProfessorName);

        Console.WriteLine(Pro2.Age);

        Console.WriteLine(Pro2.DegreeType);

    }

}