dsakdks.cs

using System;
using System.IO;
using System.Collections.Generic;

namespace NumberSort
{
    class Program
    {
        // the definition of the delegate function data type
        delegate double sortingFunction(double[] a);

        static void Main(string[] args)
        {
            // declare the unsorted and sorted arrays
            double[] aUnsorted;
            double[] aSorted;

            List<double> aUnsortedList = new List<double>();
            List<double> aSortedList = new List<double>();

            // declare the delegate variable which will point to the function to be called
            sortingFunction findHiLow;

        // a label to allow us to easily loop back to the start if there are input issues
        start:
            Console.WriteLine("Enter a list of space-separated numbers");

            // read the space-separated string of numbers
            string sNumbers = Console.ReadLine();

            // split the string into the an array of strings which are the individual numbers
            string[] sNumber = sNumbers.Split(' ');

            // initialize the size of the unsorted array to 0
            int nUnsortedLength = 0;

            // a double used for parsing the current array element
            double nThisNumber;

            // iterate through the array of number strings
            foreach (string sThisNumber in sNumber)
            {
                // if the length of this string is 0 (ie. they typed 2 spaces in a row)
                if (sThisNumber.Length == 0)
                {
                    // skip it
                    continue;
                }

                try
                {
                    // try to parse the current string into a double
                    nThisNumber = double.Parse(sThisNumber);

                    aUnsortedList.Add(nThisNumber);

                    // if it's successful, increment the number of unsorted numbers
                    ++nUnsortedLength;
                }
                catch
                {
                    // if an exception occurs
                    // indicate which number is invalid
                    Console.WriteLine($"Number #{nUnsortedLength + 1} is not a valid number.");

                    // loop back to the start
                    goto start;
                }
            }

            //Make the sorted list
            aSortedList = aUnsortedList.GetRange(0, aUnsortedList.Count);

            //Sort the list
            aSortedList.Sort();

            // prompt for <a>scending or <d>escending
            Console.Write("Ascending or Descending? ");
            string sDirection = Console.ReadLine();

            //Reverse if descending
            if (sDirection.ToLower().StartsWith("d"))
                aSortedList.Reverse();

            // write the sorted array of numbers
            Console.WriteLine("The sorted list is: ");
            foreach (double thisNum in aSortedList)
            {
                Console.Write($"{thisNum} ");
            }

            Console.WriteLine();

            Console.ReadLine();
        }
    }
}