using System;

​

//School Employee Class

public class SchoolEmployee

{

    //1.1 [Code] Create four properties

    //(a) Name, public, string (use auto-implementation)

    //(b) EmployeeID, protected, string (use auto-implementation)

    //(c) Salary, public, int: the range of salary should be within 30000 and 100000

    //(d) JoinYear, private, int (use auto-implementation)

    public string Name {get;set;}

    protected string EmployeeID{get;set;}

    private int _Salary{get;set;}

    public int Salary

    {

        get

        {

            return _Salary;

        }

        set

        {

            if(value>=30000 && value<=100000)

            {

                _Salary = value;

            }

            else

            {

                _Salary = 50000;

            }

        }

    }

    private int JoinYear{get;set;}

    //Create default constructor

    public SchoolEmployee() {}

    //1.2 [Code] Create the second constructor with parameters to set up four properties

    public SchoolEmployee(string N, string EM, int S, int Y)

    {

        Name = N;

        EmployeeID = EM;

        Salary = S;

        JoinYear = Y;

    }

    //1.3 [Code] function

    //Function Name: PrintName

    //Input: no

    //Output: no

    //Behaviors: Console.WriteLine("Employee's Name: "+ Name);

    public void PrintName()

    {

        Console.WriteLine("Employee's Name: "+ Name);

    }

    //1.4 [Code] function

    //Function Name: Tenure

    //Input: no

    //Output: int

    //Return tenure; tenure = current year - join year + 1

    //(Hint: current year can be retrieved from DateTime.Now.Year)

    public int Tenure()

    {

        return DateTime.Now.Year - JoinYear + 1;

    }

}

​

//IJob Interface

public interface IJob 

{

    //2.1 [Code] Declare one property JobType (String)

    string JobType{get;set;}

    //2.2 [Code] Declare one function IsAccountingJob()

    //Input: none

    //Output: bool

    bool IsAccountingJob();

​

}

​

//Teacher Class

public class Teacher : SchoolEmployee, IJob //3.1 [Code] Inherit from SchoolEmployee and IJob

{

    //3.2 [Code] Create one property

    //Department, public, string (use auto-implementation)

    public string Department{get;set;}

    //3.3 [Code] Create one property

    //JobType, public, string (use auto-implementation)

    public string JobType{get;set;}

    //Create default constructor

    public Teacher() {}

    //3.4 [Code] Create the second constructor with parameters

    //Use "base" function to call parent's constructor

    //Set up the value for Department and JobType

    public Teacher(string N, string EM, int S, int Y, string D, string JT): base(N, EM, S, Y)

    {

        Department = D;

        JobType = JT;

    }

    //3.5 [Code] Method Hiding (write a funciton; hint: use new keyword)

    //Function Name: PrintName

    //Input: no

    //Output: no

    //Logic: Console.WriteLine("Teacher's Name: "+ Name);

    public new void PrintName()

    {

        Console.WriteLine("Teacher's Name: "+ Name);    

    }

    //3.6 [Code] function

    //Function Name: ShowBonus

    //Input: no

    //Output: int

    //the default bonus is 3000; if the teacher's tenure is greather than 10 years, the bonus is 5000.

    //return the bonus value

    public int ShowBonus()

    {

        int iRet = 3000;

        if (Tenure() > 10)

        {

            iRet = 5000;

        }

        return iRet;

    }

    //3.7 [Code] function

    //Function Name: IsAccountingJob

    //Input: no

    //Output: bool

    //return true if JobType equals "accounting"; false, otherwise.

    public bool IsAccountingJob()

    {

        if(JobType == "accounting")

        {

            return true;

        }

        else

        {

            return false;

        }

    }

}

​

​

public class Course

{

    //4.1 [Code] Create three properties

    //(a) CourseName, public, string (use auto-implementation)

    //(b) CourseID, public, string  (use auto-implementation)

    //(c) CourseTeacher, public, variable type: Teacher (use auto-implementation)

    public string CourseName{get;set;}

    public string CourseID{get;set;}

    public Teacher CourseTeacher{get;set;}

    //Create Constructor

    public Course() {}

    //4.2 [Code] Create the second constructor with parameters to set up three properties

    public Course(string CN, string CID, Teacher CT)

    {

        CourseName = CN;

        CourseID = CID;

        CourseTeacher = CT;

    }

    //4.3 [Code] function

    //Function Name: HighExperience

    //Input: no

    //Output: bool

    //return true if the teacher's tenure is greater than 10; false, otherwise.

    public bool HighExperience()

    {

        bool bRet = false;

        if(CourseTeacher.Tenure() > 10)

        {

            bRet = true;

        }

        return bRet;

    }

}

​

public class Program

{

    public static void Main()

    {

        //5.1 [Code] Create a Teacher object

        //Name: liu, EID: A1234, Salary: 6000, JoinYear: 2018, Department: ODT, JobType: accounting

        Teacher Teacher1 = new Teacher("liu",  "A1234",  6000, 2018 ,"ODT", "accounting");

        //5.2 [Code] Create a course object

        //CourseName: C#, CourseID: S308, CourseTeacher: the teacher you just created

        Course Course1 = new Course("C#", "S308", Teacher1);

        //5.3.1 [Code] print out course name

        Console.WriteLine("Course Name: " + Course1.CourseName);

        //5.3.2 [Code] Do course teacher have high experience or not? call HighExperience() function.

        Console.WriteLine("High experience?: " + Course1.HighExperience());

        //5.4 [Code] Call CourseTeacher.IsAccountingJob() function and show whether the job is an accounting job

        Console.WriteLine("Is account job: " +Course1.CourseTeacher.IsAccountingJob());

        //5.5 [Code] Call CourseTeacher.ShowBonus() function and show bonus

        Console.WriteLine("Bonus: " + Course1.CourseTeacher.ShowBonus());

        //5.6 [Code] Call CourseTeacher.PrintName() function

        //[Question] What function will it invoke? (function in SchoolEmployee, or function in Teacher)

        //Answer: Teacher

        Course1.CourseTeacher.PrintName();

        //5.7 [Question] Can you access to teacher's EmployeeID? Why or why not?

        //Answer: No, it's protection level prevents it

    }

}