他们的答案好像都没有输出结果. Dim r, s, c As Integer Private Sub Command1_Click() r = Val(Text1.Text) s = 3.1415926 * r ^ 2 c = 2 * 3.1415926 * r Label1.Caption = "周长是:" & c Label2.Caption = "面积是:" & s End Sub Private Sub Command2_Click() Text1.Text = "" Label1.Caption = "" Label2.Caption = "" End Sub