02.03.05.NeighborCheck

using System;

class NeighborCheck
{
    public static int sign = 0;

    public static int ValidPosition(int[] elements, int position)
    {
        if (position + 1 < elements.Length && position - 1 >= 0)
        {
            return 1;
        }
        else if (position + 1 == elements.Length)
        {
            return 2;
        }
        else
        {
            return 3;
        }
    }

    public static bool BiggerCheck(int[] elements, int position)
    {
        sign = ValidPosition(elements, position);
        if (sign == 1 && elements[position] > elements[position - 1] && elements[position] > elements[position + 1])
        {
            return true;
        }
        else if (sign == 2 && elements[position] > elements[position - 1])
        {
            return true;
        }
        else if (sign == 3 && elements[position] > elements[position + 1])
        {
            return true;
        }
        else
        {
            return false;
        }
    }

    static void Main()
    {
        int[] array = { 1, 2, 3, 4, 5, 6, 7, 8, 6 };
        int index = 7;
        bool checkBool = BiggerCheck(array, index);
        Console.WriteLine("The element at position {0} is {1}", index, array[index]);
        if (sign == 1)
        {
            Console.WriteLine("{0} is bigger than {1} and {2} : {3}", array[index], array[index - 1], array[index + 1], checkBool);
        }
        else if (sign == 2)
        {
            Console.WriteLine("{0} is bigger than {1} and (empty) : {2}", array[index], array[index - 1], checkBool);
        }
        else if (sign == 3)
        {
            Console.WriteLine("{0} is bigger than (empty) and {1} : {2}", array[index], array[index + 1], checkBool);
        }
    }
}