打開VB,新建AX DLL,工程名為Str,類名count,輸入如下代碼:
復制代碼 代碼如下:
Public Function add(ByVal a As Double, ByVal b As Double, ByVal c As Integer, ByVal d As Integer) As Double
d = CInt(d)
If c = 1 Then '加
add = FormatNumber(a + b, d)
ElseIf c = 2 Then '減
add = FormatNumber(a - b, d)
ElseIf c = 3 Then '乘
add = FormatNumber(a * b, d)
ElseIf c = 4 Then '除
add = FormatNumber(a / b, d)
End If
End Function
參數說明:a,b 為需要計算的數值,c為計算類型,d為小數點保留多少位
客戶端ASP文件代碼:
復制代碼 代碼如下:
set obj=server.CreateObject("str.count")
dim c
c=obj.Add(455,45,4,2)
Response.Write c
上面代碼執行結果就是:455除以45,小數點精確到百分位
