using System;

namespace Program

{

​

    class Numbers

    {

        private int[] ArrNumbers;

​

        public int getLength()

        {

            return ArrNumbers.Length;

        }

​

        public Numbers()

        {

            ArrNumbers = new int[5];

        }

​

        public int getNumber(int index)

        {

            return ArrNumbers[index];

        }

​

        public void setNumber(int index, int val)

        {

            ArrNumbers[index] = val;

        }

​

        public void swap()

        {

            int temp;

            for (int i = 0; i < ArrNumbers.Length - 1; i++)

            {

                if (i % 2 == 0)

                {

                    temp = ArrNumbers[i];

                    ArrNumbers[i] = ArrNumbers[i + 1];

                    ArrNumbers[i + 1] = temp;

                }

            }

        }

    }

​

    public class FiveElementsSwap

    {

        public static void Main(string[] args)

        {

            Numbers number = new Numbers();

            Console.WriteLine("Enter 5 numbers");

            Console.WriteLine("Input: ");

            for (int i = 0; i < number.getLength(); i++)

            {

                number.setNumber(i, Convert.ToInt32(Console.ReadLine()));

            }

​

            number.swap();

​

            Console.WriteLine("\nOutput:");

            for (int i = 0; i < 5; i++)

            {

                Console.Write("{0} ", number.getNumber(i));

            }

​

            Console.WriteLine();

        }

    }

}