using System;

public class Program

{

    public static void Main()

    {

        byte zahl = 0x03;

        byte size = 8;

        int number = 0;

        for (int i = 0; i <= size-1; i=i+1 )

            Console.Write("{0} ", i);

        Console.WriteLine();

        for (int i = 0; i <= size-1; i=i+1 )

        {               

            Console.Write( "{0:x} ", ( zahl >> i) & 0x01 );

            if( ( (zahl >> i) & 0x01 ) == 0x01 )

                number = number + 1;

        }

        Console.WriteLine("\n\nAnzahl Einsen: {0}", number);

        Console.WriteLine("{0:x}", 0x01 & 0x03);

    }

}