Help with C# code nthnumber constant error shows up

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I'm trying to make a multithreaded Fibonnaci series program. I keep getting errors on the nthNumber part of the code. I'm not sure how to fix it, I have tried a few different things and nothing has really gotten rid of the error.

C#

{

    public class Worker
    {
        private readonly int nthNumber;

        public Worker(int nthNumber) => this.nthNumber = nthNumber;

        public void Calculate(object o)
        {
            Console.WriteLine("Fibonacci {0} is {1}", nthNumber, Fibonacci(nthNumber));
        }

        internal static int Fibonacci(int n)
        {
            if (n == 0)
            {
                return 0;
            }
            else if (n == 1)
            {
                return 1;
            }
            else
            {
                return Fibonacci(n - 1) + Fibonacci(n - 2);
            }
        }



        internal static readonly EventWaitHandle AllWorkersCompleted = new EventWaitHandle(false, EventResetMode.AutoReset);
        private static int numberOfWorkers = 0;
        private readonly int nthNumber;

        public Worker()
        {
            Interlocked.Increment(ref numberOfWorkers);
            this.nthNumber = nthNumber;
        }

        public void Calculate(object o)
        {
            Console.WriteLine("Fibonacci {0} is {1}", nthNumber, Fibonacci(nthNumber));
            if (Interlocked.Decrement(ref numberOfWorkers) == 0)
            {
                AllWorkersCompleted.Set();
            }

What I have tried:

I've tried suggestions given by Visual Studio itself and none of the suggestions worked.

Posted 2-Sep-20 1:51am

Hankatoo1618

Updated 2-Sep-20 2:22am

CPallini

v2

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Comments

F-ES Sitecore 2-Sep-20 7:58am

What is the error and what line does it occur on?

Hankatoo1618 2-Sep-20 8:03am

Any line with nthNumber on it, it shows an error that says the type Worker already contains a definition for nthNumber.

Member 12901943 2-Sep-20 8:14am

It's not simply that you have nthNumber defined twice "private readonly int nthNumber;" -- first line of the worker class then again after the AllWorkersCompleted defintion?

Hankatoo1618 2-Sep-20 8:32am

yes

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OriginalGriff · Answer 1 · 2020-09-02T02:23:00

Quote:
the type Worker already contains a definition for nthNumber

And indeed it does: one at the top of the file:

C#

public class Worker
{
    private readonly int nthNumber;

    public Worker(int nthNumber) => this.nthNumber = nthNumber;

And one nearer the bottom:

C#

private static int numberOfWorkers = 0;
private readonly int nthNumber;

public Worker()
{
    Interlocked.Increment(ref numberOfWorkers);
    this.nthNumber = nthNumber;
}

And your parameterless constructor is useless, as it assigns the value of nthNumber to itself. Since the method does not define a local or parameter variable called nthNumber it means that this.nthNumber and nthNumber are the same variable.