Calculate cubic root

Question

I’m having trouble creating the following Root and LN buttons. I have buttons that should be very similar as for example the normal square root and the log.

I tried to create the following for the cubic root:

   private void btn_raizcub_Click(object sender, RoutedEventArgs e)
    {
        primeiro += double.Parse(janela.Text);
        resutado = Convert.ToSingle(Math.Sqrt(primeiro/3.0));
        janela.Text = resutado.ToString();
    }

Answer 1

The correct formula for obtaining the cubic root is:

Pow(primeiro, 1.0/3.0)

Behold working in the ideone. And in the .NET Fiddle. Also put on the Github for future reference.

Note that this double.Parse() can fail, I would not use this way, the TryParse() is more suitable. It’s kind of weird to create a kind of double precision and use a Convert.ToSingle().