第14週
Dim n As Integer Dim spec As String Const period As Integer = 4 Const maxerror As Double = 0.0000001 Dim payment(period) As Double '廣域變數 4 維度的陣列 Private Sub CommandButton1_Click() Dim a, b, c, f, gap As Double Dim loopNumber As Integer n = n + 1 '第幾次計算+1 a = 0 '報酬率0 b = 1 '報酬率1 gap = 10 loopNumber = 10 payment(0) = TextBox1.Value payment(1) = TextBox2.Value payment(2) = TextBox3.Value payment(3) = TextBox4.Value f = npv(a) If f = 0 Then Label9.Caption = 0 ElseIf f < 0 Then Label9.Caption = "內部報酬率小於 0." Else Do While gap > mexerror And Abs(f) > maxerror And loopNumber < 100 loopNumber = loopNumber + 1 c = (a + b) / 2 f = npv(c) If Abs(f) > maxerror And gap >...
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