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Coding Conundrums 1.2: Number Shuffle

starbeamrainbowlabs Feb 9th, 2015 (edited) 171 Never
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  1. using System;
  2.  
  3. class Program
  4. {
  5.         public static void PrintHelp()
  6.         {
  7.                 Console.WriteLine("Coding Conundrums Problem 1.2 Solution: Number Shuffle");
  8.                 Console.WriteLine("------------------------------------------------------");
  9.                 Console.WriteLine("Problem Description:");
  10.                 Console.WriteLine("    I want a program that will print outthe numbers 1,2,3,4,5,6,7,8,9 in a");
  11.                 Console.WriteLine("    shuffled order. The order must be different each time the program runs. Note");
  12.                 Console.WriteLine("    that the same number must be different each time. It should be possible to");
  13.                 Console.WriteLine("    extend this to work with 52 numbers, in which case I can make a shuffled");
  14.                 Console.WriteLine("    deck of cards.");
  15.                 Console.WriteLine();
  16.                 Console.WriteLine("Use it like this: ");
  17.                 Console.WriteLine("    numbershuffle.exe <count-to>");
  18.                 Console.WriteLine();
  19.                 Console.WriteLine("Paramters:");
  20.                 Console.WriteLine("    <count-to>: The number to count up to when generating the initial sequence of numbers.");
  21.         }
  22.  
  23.         public static void Main(string[] args)
  24.         {
  25.                 if(args.Length != 1)
  26.                 {
  27.                         PrintHelp();
  28.                         return;
  29.                 }
  30.  
  31.                 int numberCount;
  32.                 if(!int.TryParse(args[0], out numberCount))
  33.                 {
  34.                         PrintHelp();
  35.                         return;
  36.                 }
  37.  
  38.  
  39.  
  40.                 int[] numbers = new int[numberCount];
  41.                 for(int i = 0; i < numberCount; i++)
  42.                 {
  43.                         numbers[i] = i + 1;
  44.                 }
  45.  
  46.                 int swapsCount = numberCount * 2;
  47.                 int temp, a, b;
  48.                 Random random = new Random();
  49.                 for(int i = 0; i < swapsCount; i++)
  50.                 {
  51.                         a = random.Next(numbers.Length);
  52.                         b = random.Next(numbers.Length);
  53.  
  54.                         temp = numbers[a];
  55.                         numbers[a] = numbers[b];
  56.                         numbers[b] = temp;
  57.                 }
  58.  
  59.                 for(int i = 0; i < numbers.Length; i++)
  60.                 {
  61.                         Console.Write("{0} ", numbers[i]);
  62.                 }
  63.         }
  64. }
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