using System;

​

    //Model the Product class knowing that:

    //a product has a weight

    //has a name

    //a production date

    //an expiration date

    //it has a producer

    //and it can be in one of categories : Dairy, Fruit, Beverages, Bread

    //we also knoow that it expires differently based on the category it belongs to:

     //   fruits expire in 2 days

    //beverages expire in 3 years

    //    dairy expire in 1 week

     //   bread expires in 4 days

​

public abstract class Product

{

    public float weight;

    public string name;

    public DateTime productionDate;

    public  DateTime expirationDate;

    public string producer;

    public DateTime ProductionDate

    {

        get

        {

            return this.productionDate;

        }

        set

        {

            this.productionDate = value;

        }

    }

    public abstract DateTime GetExpirationDate();

}

​

public class Dairy : Product

{

    public override DateTime GetExpirationDate()

    {

        return this.ProductionDate.Date.AddDays(7);

    }

    public void Print()

    {

        Console.WriteLine("I'm a dairy product. My name is {0} and I weight {1} kg, I was produced by {2} in {3} and I wil expire in {4}.\n", this.name, this.weight, this.producer, this.ProductionDate.ToShortDateString(), this.GetExpirationDate().ToShortDateString());

    }

}

​

public class Fruit : Product

{

    public override DateTime GetExpirationDate()

    {

        return this.ProductionDate.Date.AddDays(2);

    }

        public void Print()

    {

        Console.WriteLine("I'm a fruit. My name is {0} and I weight {1} kg, I was produced by {2} in {3} and I wil expire in {4}.\n", this.name, this.weight, this.producer, this.ProductionDate.ToShortDateString(), this.GetExpirationDate().ToShortDateString());

    }

}

​

public class Beverage : Product

{

    public override DateTime GetExpirationDate()

    {

        return this.ProductionDate.Date.AddYears(3);

    }

        public void Print()

    {

        Console.WriteLine("I'm a beverage. My name is {0} and I weight {1} kg, I was produced by {2} in {3} and I wil expire in {4}.\n", this.name, this.weight, this.producer, this.ProductionDate.ToShortDateString(), this.GetExpirationDate().ToShortDateString());

    }

}

​

public class Bread : Product

{

    public override DateTime GetExpirationDate()

    {

        return this.ProductionDate.Date.AddDays(4);

    }

        public void Print()

    {

        Console.WriteLine("I'm a bread. My name is {0} and I weight {1} kg, I was produced by {2} in {3} and I wil expire in {4}.\n", this.name, this.weight, this.producer, this.ProductionDate.ToShortDateString(), this.GetExpirationDate().ToShortDateString());

    }

}

​

public class Program

{

    public static void Main()

    {

        //beverage

        Beverage cola = new Beverage();

        cola.name = "Coca";

        cola.producer = "Coca Cola";

        cola.weight = 1.5f;

        cola.ProductionDate = new DateTime(2018,12,03);

        cola.Print();

        //dairy

        Dairy lapte = new Dairy();

        lapte.name = "ZUZU";

        lapte.producer = "Albalact";

        lapte.weight = 1f;

        lapte.ProductionDate = new DateTime(2018,12,03);

        lapte.Print();

        //fruit

        Fruit banana = new Fruit();

        banana.name = "Ciquita";

        banana.producer = "banana tree";

        banana.weight = 0.3f;

        banana.ProductionDate = new DateTime(2018,12,03);

        banana.Print();

        //bread

        Bread panica = new Bread();

        panica.name = "Yam Yam";

        panica.producer = "mamica";

        panica.weight = 0.230f;

        panica.ProductionDate = new DateTime(2018,12,03);

        panica.Print();

    }

}