using System;

using System.Linq;

using System.IO;

​

// Solve exercises according to the order

​

public class Program

{

    public static void Main()

        {

            Console.WriteLine("Print array with random numbers: ");

            PrintArray(GenerateRandomNumbers());

​

            // 2. Write code to display resulted array.

            int[] sortedArray = Sorter.Sort(GenerateRandomNumbers());

            try

            {

                Console.WriteLine("Print sorted array: ");

                PrintArray(sortedArray);

            }

            catch (Exception ex)

            {

                Console.WriteLine(ex.StackTrace);

            }

​

            // 3. Write new method SaveArrayToFile which saves resulted array to temporary file on disk. Ask user to enter file name. If file name already exists ask user to confirm override.

            string fileFolder = @"d:\";

            Console.WriteLine("Enter the file name: ");

            string fileName = Console.ReadLine();

            string filePath = Path.Combine(fileFolder, fileName);

            SaveArrayToFile(filePath, sortedArray);

            // 4. Read newly created file and sort it in descending order.

            try

            {

                using (StreamReader sr = new StreamReader(filePath))

                {

                    string line = sr.ReadToEnd();

                    string[] readingArray = line.Split(new Char[] { ' ', '\t' });

                    Console.WriteLine("Reading array: ");

                    foreach (string i in readingArray)

                    {

                        Console.Write(i + " ");

                    }

                    Console.WriteLine();

                    Array.Reverse(readingArray);

                    Console.WriteLine("Reading array in descending order: ");

                    foreach (string s in readingArray)

                    {

                        Console.Write(s + " ");

                    }

                }

            }

            catch (Exception ex)

            {

                    Console.WriteLine("The file couldn't be read " + ex.Message);

            }

​

     }

​

        // It is helper method. Do not change it.

        public static void PrintArray(int[] array)

        {

            foreach (int element in array)

            {

                Console.Write(element + " ");

            }

            Console.WriteLine();

        }

​

        public static void SaveArrayToFile(string pathString, int[] sortedArray)

        {

            if (!File.Exists(pathString))

            {

                // Create a file to write to. 

                using (StreamWriter sw = File.CreateText(pathString))

                {

                    foreach (int element in sortedArray)

                    {

                        sw.Write(element + " ");

                    }

                }

                Console.WriteLine("File " + pathString + " is created with sorted array.");

            }

            else

            {

                Console.WriteLine("Such file has already created. Do you want to override it? y/n");

                string answer = Console.ReadLine();

                if (answer == "y")

                {

                    File.Delete(pathString);

                    File.Create(pathString);

                    Console.WriteLine("Your file is overriden");

                }

            }

        }

        private static int[] GenerateRandomNumbers()

        {

            var random = new Random();

            return (new int[10]).Select(i => i = random.Next(10)).ToArray();

        }

    }

​

    // 1.

    // Create static class Sorter that contains method Sort which sorts an array in ascending or descending order and throws exception if sum of all elements in the array is more than 450

    // http://msdn.microsoft.com/en-us/library/ms173160(v=vs.110).aspx

    // how to throw exceptions 

    // throw new Exception("Sum of all elements is more than 450");

    // after you finish with sorting method add exception handling to the Main method

​

    public static class Sorter

    {

        public static int[] Sort(int[] array)

        {

            Array.Sort(array);

            int sum = 0;

            foreach (int element in array)

            {

                sum = sum + element;

                if (sum > 450)

                {

                    throw new ArgumentException("Sum of all elements in the array is more than 450");

                }

            }

            return array;

        }

    }