CODEWITHSUNDEEP
c#c#-4.0sharpdevelop
user50746
user50746

Reputation: 291

What errors did I make in this very simple program on SharpDevelop?

I'm only a beginner, I've made a very simple program on SharpDevelop (C#), but it doesn't work.

Here it is:

public static void Main(string[] args)
{
    float pi;
    int n;
    pi=1;

    for(n=1; n<1000; n++)
    {
        pi=pi+((-1)^n)/(2*n+1);

        Console.WriteLine(""+pi);
    }

    Console.ReadKey(true);
}

It should just calculate pi, but it only returns a lot of 1s instead... SharpDevelop doesn't report any "error".

Could somebody point out what errors I made?

Upvotes: 1

Views: 66

Answers (1)

Dmitry
Dmitry

Reputation: 14059

It's because you are using an integer arithmetic, so each time your expression ((-1)^n)/(2*n+1) is rounded to 0.
Try to replace your pi calculation with the following line:

pi += (float)Math.Pow(-1f, n) / (2*n+1);

By the way, the ^ operator is not the exponentiation.

Upvotes: 5

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