Belov_LW_CS2

using System;
using System.Linq;

namespace Example
{
    class MyApplication
    {
        static Random rand = new Random();
        private static void First()
        {
            int[] array = new int[10];
            for (int i = 0; i < array.Length; i++)
            {
                array[i] = rand.Next(0, 10);
                Console.Write("{0} ", array[i]);
            }
            Console.WriteLine();
            for (int i = 0; i < array.Length; i++)
            {
                if (array[i] == 0)
                    array[i] = -1;
            }
            array = array.OrderBy(n => n == -1).ToArray();
            foreach (int item in array)
                Console.Write("{0} ", item);
            Console.ReadKey();
            Console.Clear();
        }
        private static void Second()
        {
            int[] array = new int[20];
            for (int i = 0; i < array.Length; i++)
            {
                array[i] = rand.Next(-10, 30);
                Console.Write("{0} ", array[i]);
            }
            Console.WriteLine();
            int sum = 0;
            int begin = Array.FindIndex(array, n => n < 0);
            if (begin != -1 && begin != array.Length - 1)
            {
                begin++;
                for (int i = begin; i < array.Length; i++)
                    sum += array[i];
            }
            Console.WriteLine(sum.ToString());
            Console.ReadKey();
            Console.Clear();
        }
        private static void Third()
        {
            int[] array = new int[20];
            for (int i = 0; i < array.Length; i++)
            {
                array[i] = rand.Next(-30, 10);
                Console.Write("{0} ", array[i]);
            }
            Console.WriteLine();
            int sum = 0;
            int begin = Array.FindIndex(array, n => n > 0);
            if (begin != -1 && begin != array.Length - 1)
            {
                begin++;
                for (int i = begin; i < array.Length; i++)
                    sum += array[i];
            }
            Console.WriteLine(sum.ToString());
            Console.ReadKey();
            Console.Clear();
        }
        private static void Fourth()
        {
            int[] array = new int[20];
            for (int i = 0; i < array.Length; i++)
            {
                array[i] = rand.Next(-10, 10);
                Console.Write("{0} ", array[i]);
            }
            Console.WriteLine();
            int min = array[0];
            int minIndex = 0;
            int max = array[0];
            int maxIndex = 0;
            for (int i = 0; i < array.Length; i++)
            {
                if (array[i] < min)
                {
                    min = array[i];
                    minIndex = i;
                }
                else if (array[i] > max)
                {
                    max = array[i];
                    maxIndex = i;
                }
            }

            Console.WriteLine("{0}, {1}, {2}, {3}", min, minIndex, max, maxIndex);
            Console.ReadKey();
            Console.Clear();
        }
        public static void Main()
        {
            First();
            Second();
            Third();
            Fourth();
        }
    }
}