using System;

​

public interface IPrinter

{

    void Print();

}

​

public interface IFigure

{

    float getSquare();

    float getPerim();

    void getInfo();

    string Name

    {

        get;

    }

}

​

//customer - покупатель

public class Customer : IPrinter, IComparable

{

    public string name;

    public string adress;

    //amount - сумма

    public float amount;

    public Customer(string name, string adress, float amount)

    {

        this.name = name;

        this.adress = adress;

        this.amount = amount;

    }

​

    public void Print()

    {

        Console.WriteLine("Имя: {0}, адресс: {1}, сумма: {2}", this.name, this.adress, this.amount);

    }

​

    public int CompareTo(Object obj)

    {

        if (obj is Customer)

        {

            Customer customer = (Customer)obj;

            if (this.amount > customer.amount)

            {

                return 1;

            }

            else if (this.amount == customer.amount)

            {

                return 0;

            }

            else

            {

                return -1;

            }

        }

        else

        {

            return 0;

        }

    }

}

​

public class Ellips : IPrinter, IFigure

{ //axis - ось

    public float smallAxis;

    public float bigAxis;

    public Ellips(float smallAxis, float bigAxis)

    {

        this.smallAxis = smallAxis;

        this.bigAxis = bigAxis;

    }

​

    public void Print()

    {

        Console.WriteLine("Малая ось: {0}, большая ось: {1}", this.smallAxis, this.bigAxis);

    }

​

    public float getSquare()

    {

        return (float)(Math.PI * this.smallAxis * this.bigAxis);

    }

​

    public float getPerim()

    {

        return (float)(4 * Math.PI * this.smallAxis * this.bigAxis + (this.bigAxis - this.smallAxis)) / (this.smallAxis + this.bigAxis);

    }

​

    public void getInfo()

    {

        Console.WriteLine("Большая ось: {0}, малая ось: {1}", this.bigAxis, this.smallAxis);

    }

​

    public string Name

    {

        get

        {

            return "Эллипс";

        }

    }

}

​

public class Program

{

    public static void showMassiv(Customer[] customers)

    {

        foreach (var item in customers)

        {

            item.Print();

        }

    }

​

    public static void Main()

    {

        //Задание 2

        Customer customer = new Customer("Daniel Hanlder", "Big Boat strt, 31", 342.3F);

        Ellips ellips = new Ellips(4.3F, 2.3F);

        customer.Print();

        ellips.Print();

        //Задание 3

        Customer[] customers = new Customer[]{customer, new Customer("Jules Winfield", "Some Street, 42", 441.4F), new Customer("Butch Coolidge", "Some Street, 54", 441.2F), new Customer("Jack Torrens", "Overlook Hotel Street, 52", 223.4F)};

        showMassiv(customers);

        Array.Sort<Customer>(customers);

        showMassiv(customers);

        //Задание 4 

        Console.WriteLine("Название фигуры: {0},\nПлощадь: {1},\nПериметр: {2}", ellips.Name, ellips.getSquare(), ellips.getPerim());

        ellips.getInfo();

    }

}