Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim a(1000), b(1000), c, n, x a(1) = 1 : a(2) = 1 : n = 2 x = Val(TextBox1.Text) Do n = n + 1 Label1.Text = n a(n) = a(n - 2) + a(n - 1) Label2.Text = a(n) b(n) = a(n) Mod x Label3.Text = b(n) a(n + 1) = a(n - 1) + a(n) Label4.Text = a(n + 1) b(n + 1) = a(n + 1) Mod x Label5.Text = b(n + 1) If b(n) * b(n + 1) = 1 Then c = n - 1 Exit Do End If Loop Label6.Text = c End Sub End Class
