Methods-06

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace _06.IndexOfElementBiggerNeighbors
{
    class Program
    {
        /*Write a method that returns the index of the first
         * element in array that is bigger than its neighbors,
         * or -1, if there’s no such element. */


        static void CreatingArray(int[] arrayNum)
        {
            Random numbers = new Random();
            for (int i = 0; i < arrayNum.Length; i++)
            {
                arrayNum[i] = numbers.Next(1, 20);
            }
        }

        // if index = 0
        static int PrintIndex(int[] array)
        {
            int index = -1;
            for (int i = 0; i < array.Length; i++)
            {
                if (i == 0 && array[i] > array[i + 1])
                {
                    index = i;
                        break;
                }
                else if ((i != 0 && i != array.Length - 1) && (array[i] > array[i + 1] && array[i] > array[i - 1]))
                {
                    index = i;
                        break;
                }
                else if (i == array.Length - 1 && array[i] > array[i - 1])
                {
                    index = i;
                    break;
                }
            }
            return index;
        }

        static void PrintArray(int[] array)
        {
            Console.Write("The given array is: ");
            for (int i = 0; i < array.Length; i++)
            {
                Console.Write(array[i] + " ");
            }
            Console.WriteLine();
        }

        static void Main()
        {
            Console.Write("Please enter length of array: ");
            int length = int.Parse(Console.ReadLine());

            int[] arrayNum = new int[length];
            CreatingArray(arrayNum);
            PrintArray(arrayNum);

            Console.Write("The index of first element bigger than its neighbors is ");
            Console.Write(PrintIndex(arrayNum));
            Console.WriteLine(".");
        }
    }
}