ChangeGivenBitInGivenPosition

using System;

//We are given the number n, the value v (v = 0 or 1) and the position p.
//write a sequence of operations that changes the value of n, so the bit on
//the position p has the value of v. Example: n=35, p=5, v=0 -> n=3.
//Another example: n=35, p=2, v=1 -> n=39.

class ChangeGivenBitInGivenPosition
{
    static void Main()
    {
        Console.Write("Number = ");
        int n = int.Parse(Console.ReadLine());
        Console.Write("Position of bit = ");
        int p = int.Parse(Console.ReadLine());
        Console.Write("Value of bit = ");
        int v = int.Parse(Console.ReadLine());

        int newNumber = 0;
        //string nBinary = Convert.ToString(n, 2).PadLeft(32, '0');   //binary of n
        //Console.WriteLine("n = {0}",nBinary);
        int pPow = (int)Math.Pow(2, p);
        //string pPowBinary = Convert.ToString(p, 2).PadLeft(32, '0');   //binary of p
        //Console.WriteLine("p = {0}", pPowBinary);


        if (v == 1)
        {
            newNumber = n | pPow;
        }
        else
        {
            int  mask = ~(1 << p);
            newNumber = n & mask;

        }
        Console.WriteLine("New Number = " + newNumber);


    }
}