Abstract Class Example

ABSTRACT  CLASS  IN DETAIL

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace OverloadingConstructor

{

    abstract class Employee

    {

        public static int tax;

        public int EmpId;

        public string EmployeeName;

        public double SalaryPerDay;

        static Employee()

        {

            tax = 200;

        }

        public Employee()

        {

        }

        public Employee(int EmpId, string EmployeeName, double SalaryPerDay)

        {

            this.EmpId = EmpId;

            this.EmployeeName = EmployeeName;

            this.SalaryPerDay = SalaryPerDay;

        }

        public void Display()

        {

            Console.WriteLine("Employee ID:" + EmpId);

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

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

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

        }

        public abstract void CalculateSalary(int NumberOfDays);

    }

    class LibraryManager : Employee

    {

        int LibId;

        public LibraryManager(int EmpId, string EmployeeName, double SalaryPerDay, int LibId)

            : base(EmpId, EmployeeName, SalaryPerDay)

        {

            this.LibId = LibId;

        }

        public new virtual void Display()

        {

            base.Display();

            Console.WriteLine("LibraryId" + LibId);

        }

        public override void CalculateSalary(int NumberOfDays)

        {

            double TotalSalaryLibraryIncharger = ((SalaryPerDay * NumberOfDays) - tax);

            Console.WriteLine("The Total Salary of TotalSalaryLibraryIncharger" + TotalSalaryLibraryIncharger);

        }

    }

    class Admin : Employee

    {

        public Admin(int EmpId, string EmployeeName, double SalaryPerDay, int LibId)

            : base(EmpId, EmployeeName, SalaryPerDay)

        {

        }

        public new virtual void Display()

        {

            base.Display();

        }

        public override void CalculateSalary(int NumberOfDays)

        {

            double TotalSalaryAdmin = ((SalaryPerDay * NumberOfDays + (SalaryPerDay * NumberOfDays) * 0.15) - tax);

            Console.WriteLine("The Total Salary of Admin" + TotalSalaryAdmin);

        }

    }

    class Program

    {

        static void Main(string[] args)

        {

            //LibraryManager objLibrary = new LibraryManager(1, "Anurag", 25.0, 100);

            //objLibrary.Display();

            //objLibrary.CalculateSalary(30);

            //Admin objAdmin = new Admin(1, "Anurag", 25.0, 100);

            //objAdmin.Display();

            //objAdmin.CalculateSalary(30);

            Employee E;

            E = new LibraryManager(2, "Abhishek", 30, 100);

           

            Console.WriteLine("=============***********Salary Structure*************===================");

            Console.WriteLine("1: Library Admin");

            Console.WriteLine("2: Admin");

            Console.WriteLine("Choose 1/2");

            int choose = int.Parse(Console.ReadLine());

            switch (choose)

            {

                case 1:

                    E = new LibraryManager(1, "Anurag", 25.0, 100);

                    break;

                case 2:

                    E = new Admin(1, "Anurag", 25.0, 100);

                    break;

                default:

                    break;

            }

            E.Display();

            E.CalculateSalary(30);

            Console.WriteLine("=============***********Thank You*************===================");

            Console.ReadLine();

        }

    }

}