BitExchange

/* Write a program that exchanges bits 3, 4 and 5
 * with bits 24, 25 and 26 of given 32-bit unsigned integer.
 */

using System;

class BitExchange
{
    static void Main()
    {
        int number = 1073709056;
        int mask = 7;
        // Getting the 3, 4, 5 bits
        int firstTreeBits = number & (mask << 3);
        // Getting the 24, 25, 26 bits
        int secondTreeBits = number & (mask << 24);
        // Moving the bits to there corekt position
        firstTreeBits = firstTreeBits << 21;
        secondTreeBits = secondTreeBits >> 21;
        // Replaceing the 3,4,5 bits in the number with 0;
        number = number & (~(mask << 3));
        Console.WriteLine(Convert.ToString(number, 2));
        // Replaceing the 24,25,26 bits in the number with 0;
        number = number & (~(mask << 24));
        Console.WriteLine(Convert.ToString(number, 2));
        // Inserting the reversed bits
        number = number | firstTreeBits;
        Console.WriteLine(Convert.ToString(number, 2));
        number = number | secondTreeBits;
        Console.WriteLine(Convert.ToString(number, 2));
    }
}