using System;

​

public class SecondLargestFinder

{

    /// <summary>

    /// Prints the second largest number in an array

    /// </summary>

    /// <param name="n">The number limit of integer</param>

    public void PrintSecondLargest(int n)

    {

        if (n <= 1)

        {

            Console.WriteLine("Array size should be greater than 1 to find the second largest element.");

            return;

        }

​

        int? largest = null;

        int? secondLargest = null;

​

        for (int i = 1; i <= n; i++)

        {

            Console.Write($"Enter {i}:");

            if (!int.TryParse(Console.ReadLine(), out int num))

            {

                Console.WriteLine("Invalid input. Please enter a valid integer.");

                return;

            }

​

            if (largest == null || num > largest)

            {

                secondLargest = largest;

                largest = num;

            }

            else if (num > secondLargest && num != largest)

            {

                secondLargest = num;

            }

            else if (secondLargest == null && num != largest)

            {

                secondLargest = num;

            }

        }

​

        if (secondLargest == null)

        {

            Console.WriteLine("There is no second largest element in the array.");

        }

        else

        {

            Console.WriteLine("The second largest number is " + secondLargest);

        }

    }

​

    public static void Main()

    {

        Console.WriteLine("Enter the limit of integer");

        if (!int.TryParse(Console.ReadLine(), out int n))

        {

            Console.WriteLine("Invalid input. Please enter a valid integer for the limit.");

            return;

        }

​

        SecondLargestFinder finder = new SecondLargestFinder();

        finder.PrintSecondLargest(n);

    }

}