計算數字為2的？次方或求2的n次方 程式碼

Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click

        Dim n As Integer

        n = TextBox1.Text

        Label1.Text = 2 ^ TextBox1.Text

    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click

        Dim m As Integer

        m = TextBox2.Text

        Dim ans As Integer

        Do Until m = 1

            ans += 1

            m /= 2

        Loop

        Label2.Text = ans

    End Sub

End Class

求最大公因數的三種表示法

一	Function GCD(ByVal a%, ByVal b%)         Do Until a = b             If a > b Then a -= b             If a < b Then b -= a         Loop         GCD = a     End Function
二	Function GCD(ByVal a%, ByVal b%)         GCD = If(b = 0, a, GCD(b, a Mod b))     End Function
三	Function GCD(ByVal a%, ByVal b%)         If b = 0 Then             GCD = a         Else             GCD = GCD(b, a Mod b)         End If     End Function