using System;

public class Program

{

    public static void Main()

    {

        ExampleArray1();

    }

    static void ExampleArray1()

        {

            int[] array = new int[10000];

            int n = 0;

            int[] array1 = new int[4] { 1, 2, 3, 4 };

            bool check = true;

            string choice;

            do

            {

                Console.WriteLine("\n\t\tProgram array: ");

                Console.WriteLine("1. Input array");

                Console.WriteLine("2. Output array");

                Console.WriteLine("3. Sort array up");

                Console.WriteLine("4. Sort array down");

                Console.WriteLine("5. Delete number in array");

                Console.WriteLine("6. Equals 2 array");

                Console.WriteLine("7. Exit!");

​

                Console.Write("Please input choice: ");

                choice = Console.ReadLine();

                switch (choice)

                {

                    case "1":

                        Console.Clear();

                        Console.Write("Please input number n: ");

                        n = Convert.ToInt32(Console.ReadLine());

                        if (n > 10000)

                        {

                            Console.WriteLine("Invalid input number!");

                            break;

                        }

                        Console.WriteLine("Please input {0} number in array: ", n);

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

                        {

                            Console.Write("Please input arr[{0}] = ", i);

                            array[i] = Convert.ToInt32(Console.ReadLine());

                        }

                        break;

                    case "2":

                        Console.Clear();

                        Console.WriteLine("Output numbers in array: ");

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

                        {

                            Console.Write("arr[{0}] = {1}\n", i, array[i]);

                        }

                        break;

                    case "3":

                        Console.Clear();

                        int tempUp;

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

                        {

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

                            {

                                if (array[j] < array[i])

                                {

                                    tempUp = array[i];

                                    array[i] = array[j];

                                    array[j] = tempUp;

                                }

                            }

                        }

                        Console.WriteLine("Output numbers in array after sort up: ");

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

                        {

                            Console.Write("arr[{0}] = {1}\n", i, array[i]);

                        }

                        break;

                    case "4":

                        Console.Clear();

                        int tempDown;

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

                        {

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

                            {

                                if (array[j] > array[i])

                                {

                                    tempDown = array[i];

                                    array[i] = array[j];

                                    array[j] = tempDown;

                                }

                            }

                        }

                        Console.WriteLine("Output numbers in array after sort down: ");

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

                        {

                            Console.Write("arr[{0}] = {1}\n", i, array[i]);

                        }

                        break;

                    case "5":

                        Console.Clear();

                        int position;

                        Console.Write("Please input position in array value to delete: ");

                        position = Convert.ToInt32(Console.ReadLine());

                        int iDe = 0;

                        iDe = 0;

                        while (iDe != position - 1)

                            iDe++;

                        while (iDe < n)

                        {

                            array[iDe] = array[iDe + 1];

                            iDe++;

                        }

                        n--;

                        Console.WriteLine("Output numbers in array after delete value: ");

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

                        {

                            Console.Write("arr[{0}] = {1}\n", i, array[i]);

                        }

                        break;

                    case "6":

                        Equals2Arrays(array, array1);

                        break;

                    case "7":

                        check = false;

                        break;

                }

            } while (check);

        }

        public static void Equals2Arrays(int[] arr1,int[] arr2)

        {

            bool check = false;

            for(int i = 0; i < arr1.Length; i++)

            {

                for(int j = 0; j < arr2.Length; j++)

                {

                    if(arr1[i] == arr2[j])

                    {

                        check = true;

                    }

                }

            }

            if(check == true)

            {

                Console.WriteLine(""+check);

            }

        }

}