Quick Puzzle: what does this program print?

You have 30 seconds left... just kidding :-)

 

using System;

using System.Collections;

using System.Reflection;

class Hello

{

    Type Unknown { get { return World.GetType(); } }

    object[] Knowledge() { return Unknown.GetProperties(); }

    string[] Library()

    {

        return Array.ConvertAll<object, string>(

            Knowledge(),

            delegate(object x) { return x.ToString(); });

    }

    public static Hello World { get { return new Hello(); } }

    static void Main(string[] args)

    {

        if (args.Length > 0)

            Console.WriteLine(args[0]);

        else

            Main(World.Library());

    }

}

 

[update. The code above compiles only with the C# 2.0 compiler. The simplest way to get started is to download Visual C# Express from here]

Comments

• Anonymous
  February 07, 2005
  I took a shot at solving it (spoiler):
  http://inesontech.blogspot.com/2005/02/nice-c-puzzle.html
  
  
• Anonymous
  February 08, 2005
  I haven't tried running it, but wouldn't it be better if the Console.WriteLine call looked like:
  
  Console.WriteLine(args[0].Replace('.', ' ') + "!");
• Anonymous
  February 08, 2005
  By the way, that ConvertAll function is cool. And this little quiz is a neat way of showing it off :)
• Anonymous
  February 08, 2005
  Interesting, but I was able to figure it out :-/ Which means this is nothing compared to the International Obfuscated C Code Contest. There are plenty of snippets there that made me go "Huh?!" many times :) My all time favourite is http://www.ioccc.org/2000/primenum.c
• Anonymous
  February 08, 2005
  >> Which means this is nothing compared to the International Obfuscated C Code Contest.
  
  I didn't want to go there :-)
  
  BTW, my favorite is: http://www.ioccc.org/1984/anonymous.c