using System;

​

//School Employee Class

public class SchoolEmployee

{

    //1.1 [Code] Create four properties

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

    public string Name { get; set ;}

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

    protected string EmployeeID { get; set; }

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

    private int _Salary;

    public int Salary

    { 

        get 

        {

              return _Salary; 

        }

        set 

        {

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

                _Salary = value;

        }

    }

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

    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 emp, int s, int y)

    {

        Name = n;

        EmployeeID = emp;

        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 emp, int s, int y, string dept, string job) : base(n, emp, s, y)

    {

        Department = dept;

        JobType = job;

    }

    //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 ibonus = 3000;

        if (Tenure() > 10)

            ibonus = 5000;

        return ibonus;

    }

    //3.7 [Code] function

    //Function Name: IsAccountingJob

    //Input: no

    //Output: bool

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

    public bool IsAccountingJob()

    {

        bool bRet = false;

        if(JobType == "accounting")

            bRet = true;

        return bRet;

    }

}

​

public class Course

{

    //4.1 [Code] Create three properties

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

    public string CourseName { get; set; }

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

    public string CourseID { get; set;}

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

    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 cname, string cid, Teacher cteach)

    {

        CourseName = cname;

        CourseID = cid;

        CourseTeacher = cteach;

    }

    //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 myTeacher = new Teacher("liu", "A1234", 60000, 2018, "ODT", "accounting"); 

        //5.2 [Code] Create a course object

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

        Course c1 = new Course("C#", "S308", myTeacher);

        //5.3.1 [Code] print out course name

        Console.WriteLine("Course Name: " + c1.CourseName);

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

        Console.WriteLine("Does course teacher have high experience? " + c1.HighExperience());

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

        Console.WriteLine("Is the job accounting? " + c1.CourseTeacher.IsAccountingJob());

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

        Console.WriteLine("Bonus: " + c1.CourseTeacher.ShowBonus()); 

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

        c1.CourseTeacher.PrintName();

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

        //Answer: calling child function, and the technic is hiding. 

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

        //Answer: No because the access modifier is protected.

    }

}