ExchangeBits

using System;

class ExchangeBits
{
    static void Main()
    {
        Console.WriteLine("This program exchanges bits 3, 4 and 5 with bits 24, 25 and 26 of given\n32-bit unsigned integer.\n");
        Console.Write("Please insert a positive integer number: ");
        uint controlNumber = uint.Parse(Console.ReadLine());
        uint resultNumber = controlNumber;
        byte firstBitPosition = 3;
        byte secondBitPosition = 24;

        for (byte i = 0; i < 3; i++, firstBitPosition++, secondBitPosition++)
        {
            uint secondTempVariable;
            uint firstTempVariable;
            uint firstBit;
            uint secondBit;
            uint mask = 1u;

            //Finding the value of the bit on position firstBitPosition (3,4,5)
            mask <<= firstBitPosition;
            firstBit = (mask & controlNumber);
            firstBit >>= firstBitPosition;

            //Finding the value of the bit on position secondBitPosition (24,25,26)
            mask = (1u << secondBitPosition);
            secondBit = (mask & controlNumber);
            secondBit >>= secondBitPosition;

            //Setting the value of bit firstBitPosition to position secondBitPosition
            if (firstBit == 1)
            {
                mask = 1u << secondBitPosition;
                secondTempVariable = resultNumber | mask;
            }
            else
            {
                mask = ~(1u << secondBitPosition);
                secondTempVariable = resultNumber & mask;
            }
            firstTempVariable = secondTempVariable;

            //Setting value of bit secondBitPosition to position firstBitPosition
            if (secondBit == 1)
            {
                mask = 1u << firstBitPosition;
                resultNumber = (firstTempVariable | mask);
            }
            else
            {
                mask = ~(1u << firstBitPosition);
                resultNumber = firstTempVariable & mask;
            }


        }
        Console.WriteLine("\nThe new number is {0}.\n", resultNumber);
        Console.WriteLine(controlNumber + " - " + Convert.ToString(controlNumber, 2).PadLeft(32, '0'));
        Console.WriteLine(resultNumber + "-" + Convert.ToString(resultNumber, 2).PadLeft(32, '0'));
    }

}