[c#] CHALLENGE - Beat the time! #2

[akthechamp]

Just 2 participants ? guys plz start from a low level programing n language like c++ so that every can participate

thanx y0....n yeah nice idea there by Hyperz n Jay will make people do something more than Css n php shit

[Whoo]

Decided to give this a go

The code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;

namespace KWWH_RandomNumberGenerator
{
    class Program
    {
        static Stopwatch sw = new Stopwatch();
        static Random rnd = new Random();


        static void Main(string[] args)
        {
            sw.Start();
            for (int i = 0; i <= 10000000; i++)
            {
                getRand();
            }
            Console.WriteLine(sw.Elapsed.ToString() + " - Whoo");
            Console.ReadLine();
        }

        private static void getRand()
        {
            int lol = ((rnd.Next() * 1103515245) + 12345) & 0x7fffffff;
        }
    }
} 

The result:

[jayfella]

well the whole point is to do it over more than one thread - which is in fact riddled with obstacles - but great attempt - also, the reason we arent using static Random is because its slow as hell. Instead we use a known "pseudo random" algorythm.

Hint 1: Using the same object "rnd" over multiple threads will yeild the same random number because it uses TickRate as the seed - and because the calculations are done so fast, the tickrate doesnt even get a chance to change before 50-100 random numbers are generated, and thus you get the same "random number" (assuming you already know PC's can only produce "fake random")

But thanks for joining the challenge - keep going

[Whoo]

well the whole point is to do it over more than one thread - which is in fact riddled with obstacles - but great attempt - also, the reason we arent using static Random is because its slow as hell. Instead we use a known "pseudo random" algorythm.

Hint 1: Using the same object "rnd" over multiple threads will yeild the same random number because it uses TickRate as the seed - and because the calculations are done so fast, the tickrate doesnt even get a chance to change before 50-100 random numbers are generated, and thus you get the same "random number" (assuming you already know PC's can only produce "fake random")

But thanks for joining the challenge - keep going

Thanks for the hint jaydude

I posted it because even though I used the Random class, it still generates them a bit faster than the first results of Hyperz. I printed out a few numbers and they look like this more or less:

1317421276
1968034171
612093081
970587761
1608097552
1713051480
85828884
752998216

Quite sufficient IMO but as you said it wouldn't be able to spread across different threads.

[Hyperz]

10.000.001 != 100.000.000 Whoo .

Btw, what's the logic behind:

((rnd.Next() * 1103515245) + 12345) & 0x7fffffff

I mean, is that randomly hitting the keyboard or is there a reason for slowing it down?

Edit:
And also your function doesn't return the result(s)

[jayfella]

i think he was trying to randomize the seed maybe.

[Hyperz]

But there is no seed involved . Random uses Environment.TickCount by default. And the output of Next() is already random. Is ((rnd.Next() + 1) ^ 0) more random than random ?

[jayfella]

i didnt say it worked i was hazarding a guess.

[BadLuckGuy]

BadLuckGuy - We are using Visual Studio 2010 - which compiles to exe yes.

Ohh Thaaaaaaaaaanks for telling. Will give it a try when i am free
ATM opening katz.cd to search and DL it

[BadLuckGuy]

Aaaaaaaahhhhh OMG OMG OMG
Visual Studio Ultimate is of 12 THOUSAND DOLLARS
Is there any software more expensive than this?