using System;

namespace Program

{

​

    class Numbers

    {

        private int[] numbers;

​

        public int getLength()

        {

            return numbers.Length;

        }

​

        // Default constructor

        public Numbers()

        {

            numbers = new int[5];

        }

​

        // Getter and setter for numbers

        public int getNumber(int index)

        {

            return numbers[index];

        }

​

        public void setNumber(int index, int value)

        {

            numbers[index] = value;

        }

​

        // Function to swap the even and odd positioned elements

        public void swap()

        {

            int temp;

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

            {

                if (i % 2 == 0)

                {

                    temp = numbers[i];

                    numbers[i] = numbers[i + 1];

                    numbers[i + 1] = temp;

                }

            }

        }

    }

​

    class Prg

    {

        static void Main(string[] args)

        {

            Numbers num = new Numbers();

            Console.Write("Enter numbers: ");

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

            {

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

            }

            // Swap the even and odd positioned elements

            num.swap();

​

            Console.WriteLine("\nAfter swapping:");

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

            {

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

            }

​

            Console.WriteLine();

        }

    }

}