test12

using System;

class Program
{
    static void Main()
    {
        int lastBit;
        int result;
        Console.WriteLine("Please input new Bit value 0|1:");
        int newBit = int.Parse(Console.ReadLine());
        while ((newBit != 0) && (newBit != 1))
        {
            Console.WriteLine("Please input new Bit value 0|1:");
            newBit = int.Parse(Console.ReadLine());
        }
        Console.WriteLine("Please input integer value:");
        int number = Math.Abs(int.Parse(Console.ReadLine()));
        Console.WriteLine(Convert.ToString(number, 2).PadLeft(32, '0'));
        Console.WriteLine("Please input position to change:");
        int position = Math.Abs(int.Parse(Console.ReadLine()));
        int mask = (1 << position);
        lastBit = (number & (1 << position)) >> position;
        if (lastBit == newBit)
        {
            Console.WriteLine("Nothing to change!");
        }
        if (lastBit != newBit)
        {
            result = number ^ mask;
            Console.WriteLine(new string('-', 32));
            Console.WriteLine("{0} -> original", Convert.ToString(number, 2).PadLeft(32, '0'));
            Console.WriteLine("{0} -> new", Convert.ToString(result, 2).PadLeft(32, '0'));
        }
    }
}