各位高手：
我将a定义成signal类型，结果为0.123456...但是我想要a的结果为0.1234，请问该怎么办？

假如要保留n位小数
a=cint(a*10^n)/(10^n)
这只是其中一种方法

谢谢版主，还有个问题：
Private Sub TabStrip1_Click()
...
Case 1
Text1.Text = ""
Text2.Text = CInt(Val(b) * 10 ^ 4) / (10 ^ 4) 这里没问题
...
end Select
end sub

Private Sub Command4_Click()
...
Select Case Tabs
Case 1
If q <> 0 Then
s = 1800 * Val(Text3.Text)
Text1.Text = cint(Val(s)*10^4)/(10^4)这里提示有错误
ElseIf q = 0 Then
s = 0
End If
...
End Select
End Sub
我不知道怎么错了
谢谢！

虽然上面的没有问题也建议你写成:
Text2.Text=Cstr(Cint(Val(b)*10^4)/(10^4))
因为=左边是字符型,右边也要是
这句话语法上应该没有错误,前面加个Cstr再看看对不对

版主：
谢谢，还是不行！

cint函数是四舍五入吗?
如果是的话,这样写的结果就不准确了.

你把Command4下的代码多发一点来看看吧

Private Sub Command4_Click()
If be <= 2.4 Then
Fwe = 0.87
ElseIf be <= 2.7 And be > 2.4 Then
Fwe = 0.9
ElseIf be <= 3 And be > 2.7 Then
Fwe = 0.93
ElseIf be <= 3.4 And be > 3 Then
Fwe = 0.97
ElseIf be <= 3.7 And be > 3.4 Then
Fwe = 1
ElseIf be <= 4 And be > 3.7 Then
Fwe = 1.03
ElseIf be <= 4.3 And be > 4 Then
Fwe = 1.07
ElseIf be > 4.3 Then
Fwe = 1.1
End If

If bw <= 2.4 Then
Fww = 0.87
ElseIf bw <= 2.7 And bw > 2.4 Then
Fww = 0.9
ElseIf bw <= 3 And bw > 2.7 Then
Fww = 0.93
ElseIf bw <= 3.4 And bw > 3 Then
Fww = 0.97
ElseIf bw <= 3.7 And bw > 3.4 Then
Fww = 1
ElseIf bw <= 4 And bw > 3.7 Then
Fww = 1.03
ElseIf bw <= 4.3 And bw > 4 Then
Fww = 1.07
ElseIf bw > 4.3 Then
Fww = 1.1
End If

If bs <= 2.4 Then
Fws = 0.87
ElseIf bs <= 2.7 And bs > 2.4 Then
Fws = 0.9
ElseIf bs <= 3 And bs > 2.7 Then
Fws = 0.93
ElseIf bs <= 3.4 And bs > 3 Then
Fwe = 0.97
ElseIf bs <= 3.7 And bs > 3.4 Then
Fws = 1
ElseIf bs <= 4 And bs > 3.7 Then
Fws = 1.03
ElseIf bs <= 4.3 And bs > 4 Then
Fws = 1.07
ElseIf bs > 4.3 Then
Fws = 1.1
End If

If bn <= 2.4 Then
Fwn = 0.87
ElseIf bn <= 2.7 And bn > 2.4 Then
Fwn = 0.9
ElseIf bn <= 3 And bn > 2.7 Then
Fwn = 0.93
ElseIf bn <= 3.4 And bn > 3 Then
Fwn = 0.97
ElseIf bn <= 3.7 And bn > 3.4 Then
Fwn = 1
ElseIf bn <= 4 And bn > 3.7 Then
Fwn = 1.03
ElseIf bn <= 4.3 And bn > 4 Then
Fwn = 1.07
ElseIf bn > 4.3 Then
Fwn = 1.1
End If

Select Case Tabs
Case 1
If q1 <> 0 Then q1,q2,q3,q4是全局变量，在上一窗体中赋值
s1 = 1800 * Val(Text1.Text) * Fwe
Text5.Text = Val(s1)
ElseIf q1 = 0 Then
s1 = 0
End If

Case 2
If q2 <> 0 Then
s2 = 1800 * Val(Text2.Text) * Fwe
Text6.Text = Val(s2)
ElseIf q2 = 0 Then
s2 = 0
End If

Case 3
If q3 <> 0 Then
s3 = 1800 * Val(Text3.Text) * Fwe
Text7.Text = Val(s3)
ElseIf q3 = 0 Then
s3 = 0
End If

Case 4
If q4 <> 0 Then
s4 = 1800 * Val(Text4.Text) * Fwe
Text8.Text = Val(s4)
ElseIf q4 = 0 Then
s4 = 0
End If

End Select
End Sub

Private Sub Text1_Change()
be = Val(Text1.Text)
End Sub

Private Sub Text2_Change()
bw = Val(Text2.Text)
End Sub

Private Sub Text3_Change()
bs = Val(Text3.Text)
End Sub

Private Sub Text4_Change()
bn = Val(Text4.Text)
End Sub

你的代码我试过了，没有报错，你说怎么办，打个包发来好了