using System;

using ItemNamespace;

​

public class Vlogs {

    public static void Main(string [] args) {

            Console.Write("Enter Item: ");

            string ItemN = Console.ReadLine();

            Console.Write("\nEnter Quantity: ");

            int Quanti = Convert.ToInt32(Console.ReadLine());

            DiscountedItem DisItem = new DiscountedItem(ItemN, Quanti);

            Console.WriteLine("\nDiscount: {0}", DisItem.GetDiscount());

            Console.WriteLine("\nPrice: {0}", DisItem.GetPrice());

            Console.WriteLine("\nTotal Amount: {0}", DisItem.GetTotalPrice());

            Console.WriteLine("\nPayment Received: ");

            double PaymentRec = Convert.ToDouble(Console.ReadLine());

            DisItem.SetPayment(PaymentRec);

            Console.WriteLine(DisItem.GetChange());

    }

}

​

namespace ItemNamespace {   

    public abstract class Item {

        //variables

        private string item_name;

        protected double item_price;

        //methods

        public Item(string name) {

            this.item_name = name;  

        }

        public double GetPrice() {

            return this.item_price;

        }

        public abstract double GetTotalPrice();

        public abstract void SetPayment (double amount);

    }

    public class DiscountedItem : Item {

        private double item_discount;

        private double item_quantity;

        private double discounted_price;

        private double payment_amount; 

        private double change;

        //methods

        public DiscountedItem(string name, int quantity) : base(name) {

            this.item_quantity = quantity;

            if (item_quantity >= 6) {

                this.item_discount = 0.32;

            }

            else if (item_quantity >= 3) {

                this.item_discount = 0.27;

            }

            else {

                this.item_discount = 0.00;

            }

        }

        public double GetDiscount() {

            return this.item_discount;

        }

        public override void SetPayment(double amount) {

            this.payment_amount = amount;

            change = payment_amount - item_price;

        }

        public double GetChange() {

            return this.change;

        }

        public override double GetTotalPrice() {

            this.item_price *= this.item_quantity;

            discounted_price = this.item_price * GetDiscount();

            this.item_price -= discounted_price;

            return this.item_price;

        }

    }

}

​

​