using System;

public class Program

{

    public static void Main()

    {

        Student student1 = new Student(2018181818, "Piet");

 Console.Write(student1.GetStudentNumber() + "\t");

 Console.WriteLine(student1.GetName());

​

 Student student2 = new Student();

 student2.SetStudentNumber(2018010101);

 student2.SetName("Jan");

 Console.Write(student2.GetStudentNumber() + "\t");

 Console.WriteLine(student2.GetName());//ex1

        Employee emp1 = new Employee("Piet", 200000);

        Console.WriteLine(emp1.GetEmployeeDetails());

        emp1.Increase(0.06);//calling set method

 Console.WriteLine(emp1.GetEmployeeDetails());//end ex2

    }

}//end class

public class Student

{

//fields

    private long studentNumber ;

 private string name ;

​

    //default constructor

    public Student()

    {

    }//end d constructor

    //Non default constructor

    public Student( long pstudentNumber, string pname )

    {

    studentNumber = pstudentNumber;

        name=pname;

    }//end non default

    //Accessors

    public long GetStudentNumber()

    {

        return studentNumber;

    }

    public string GetName()

    {

        return name;

    }

    //mutators

    public void SetStudentNumber(long pStudentNumber  )

    {

        studentNumber = pStudentNumber;

    }

    public void SetName( string pName )

    {

        name = pName;

    }

}//end class (ex 1)

public class Employee

​

{

    //fields

    private string name;

    private double salary;

    //non-d constructor

    public Employee(string pName , double pSalary)

    {

        name = pName;

        salary = pSalary;

    }

    public string GetEmployeeDetails()

    { return name + "\t" + salary.ToString();

    }//end method

    public void Increase(double increasePercentage)

 {

 if (increasePercentage > 0)

 salary = salary + salary * increasePercentage;

 }//end method

}//end class

​