using System;

//Professor Class

public class Professor

{

    //[Code] Define Fields

    public string ProfessorName;

    //[Code] Define Property Age

    private int age;

    private string degree;

    //Make sure Age is between 18 and 70

    public int Age

    {

        get { return age; }

        set

        {

            if (value < 18 || value > 70)

                age = 30;

            else

                age = value;

        }

    }

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

    //[Code] Define Property Degree

    public string Degree

    {

        get { return degree; }

        set

        {

            if (value.Length < 3)

                degree = "Master";

            else

                degree = value;

        }

    }

    //Make sure Degree has at least three letters

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

    //[Code] Constructor

    public Professor()

    {

        ProfessorName = "Unknown";

        Age = 30;

        Degree = "Master";

    }

    public void DisplayDetails()

    {

        Console.WriteLine("Professor Name: " + ProfessorName);

        Console.WriteLine("Age: " + Age);

        Console.WriteLine("Degree: " + Degree);

    }

}

​

class Program

{

    static void Main(string[] args)

    {

        //[Code] Create object ProfessorLiu

        Professor professorLiu = new Professor

        {

            ProfessorName = "Liu",

            Age = 99,

            Degree = "PhD"

        };

        // ProfessorName: Liu

        // Age: 99

        // Degree: PhD

        // Print out name, age, and degree

        professorLiu.DisplayDetails();

        //[Code] Create object ProfessorJames

        Professor professorJames = new Professor

        {

            ProfessorName = "James",

            Age = 35,

            Degree = "MD"

        };

        // ProfessorName: James

        // Age: 35

        // Degree: MD

        // Print out name, age, and degree

​

    }

}