3
22/10/2024 2:16 pm
Topic starter
We are given an integer number n, a bit value v (v=0 or 1) and a position p. Write a sequence of operators (a few lines of C# code) that modifies n to hold the value v at the position p from the binary representation of n while preserving all other bits in n.
Examples:
1 Answer
3
22/10/2024 2:17 pm
Here's my answer:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
class ModifyABitAtGivenPosition
{
static void Main()
{
Console.Write("Enter n (your number): ");
int n = int.Parse(Console.ReadLine());
Console.Write("Enter p (position of the bit to change): ");
int p = int.Parse(Console.ReadLine());
Console.Write("Enter v: zero or one (your bit to change): ");
int v = int.Parse(Console.ReadLine());
if (v == 1)
{
int mask = 1 << p;
int result = mask | n;
Console.WriteLine("the RESULT in decimal:{0}", result);
Console.WriteLine("the NUMBER:" + Convert.ToString(n, 2).PadLeft(32, '0'));
Console.WriteLine(" the MASK:" + Convert.ToString(mask, 2).PadLeft(32, '0'));
Console.WriteLine("the RESULT:" + Convert.ToString(result, 2).PadLeft(32, '0'));
}
else if (v == 0)
{
int mask = ~(1 << p);
int result = mask & n;
Console.WriteLine("the RESULT in decimal:{0}", result);
Console.WriteLine("the NUMBER:" + Convert.ToString(n, 2).PadLeft(32, '0'));
Console.WriteLine(" the MASK:" + Convert.ToString(mask, 2).PadLeft(32, '0'));
Console.WriteLine("the RESULT:" + Convert.ToString(result, 2).PadLeft(32, '0'));
}
else if (v != 1 || v != 0)
{
Console.WriteLine("WRONG! Please write for v: (0) or (1)");
}
}
}
