我想将我的数组设置为0位小数。我知道它必须是number.format=0。但我不知道放在哪里。抱歉我的代码格式，它不是灰色的，因为我不知道使用它。
Option Explicit
Option Base 1
Function arraydemo(r As Range)
Dim cell As Range, i As Integer, x(40, 1) As Double
i = 1
For Each cell In r
x(i, 1) = Rnd * 40
i = i + 1
Next cell
arraydemo = x
End Function
答案 0 :(得分：1)
你的数组是Double，所以当你将随机结果存储到数组时，它会自动以十进制表示，你可以删除带有从十进制到整数的数组更改声明的小数，但这会从随机结果中删除十进制值。登记/> 我认为最好的方法是：从函数的结果中修改小数。 示例：
Option Explicit
Public Declare Sub CopyMemory Lib "kernel32" Alias _
"RtlMoveMemory" (destination As Any, source As Any, _
ByVal length As Long)
'***************************************************************
'Test to see if the functions work
'**************************************************************
Public Sub Test()
'This tests the functions above against a set of doubles
'note that this is not an exhaustive test since there are
'18,014,398,509,481,984 special bit patterns. We test 7 of them
'This test assumes that ThisWorkbook has a sheet with code name Sheet1
Dim l(1 To 2) As Long, Vals(1 To 8) As Double, Oput As Variant
Dim Num As Long
'generate values to test
DoubleFromHex &HFFF00000, 1, Vals(1) 'negative overflow
DoubleFromHex &H7FF00000, 1, Vals(2) 'positive overflow
DoubleFromHex &H7FF80000, 0, Vals(3) 'Positive QNaN
DoubleFromHex &HFFF80000, 0, Vals(4) 'Indeterminate
DoubleFromHex &HFFF80000, 1, Vals(5) 'Negative QNaN
DoubleFromHex &H7FF00000, 0, Vals(6) 'Pos Infinity
DoubleFromHex &HFFF00000, 0, Vals(7) 'Neg Infinity
Vals(8) = 2.35345246654325E+27 'actual number generated using number pad fist mash alogorithm
'dimension output
ReDim Oput(1 To UBound(Vals) + 1, 1 To UBound(Vals) + 1)
'fill test titles
Oput(1, 2) = "IsOverflow"
Oput(1, 3) = "IsPosQNaN"
Oput(1, 4) = "IsNegQNaN"
Oput(1, 5) = "IsIndetermiate"
Oput(1, 6) = "IsPosInfinity"
Oput(1, 7) = "IsNegInfinity"
Oput(1, 8) = "IsSpecial"
'fill number titles
Oput(2, 1) = "Negative Overflow"
Oput(3, 1) = "Positive Overflow"
Oput(4, 1) = "Positive QNaN"
Oput(5, 1) = "Indeterminate"
Oput(6, 1) = "Negative QNaN"
Oput(7, 1) = "Pos Infinity"
Oput(8, 1) = "Neg Infinity"
Oput(9, 1) = "Actual number"
'perform tests
For Num = 1 To 8
Oput(Num + 1, 2) = IsOverflow(Vals(Num))
Oput(Num + 1, 3) = IsPosQNaN(Vals(Num))
Oput(Num + 1, 4) = IsNegQNaN(Vals(Num))
Oput(Num + 1, 5) = IsIndetermiate(Vals(Num))
Oput(Num + 1, 6) = IsPosInfinity(Vals(Num))
Oput(Num + 1, 7) = IsNegInfinity(Vals(Num))
Oput(Num + 1, 8) = IsSpecial(Vals(Num))
Next Num
'put to sheet
Sheet1.Range("A1").Resize(UBound(Oput), UBound(Oput, 2)).Value = Oput
End Sub
'***************************************************************
'Functions
'**************************************************************
Public Function IsOverflow(Val As Double) As Boolean
'This function returns true for doubles that VBA recognises as
'<overflow>
'it returns false for any other doubles
'Doubles represented by <overflow> in VBA are more commonly known
'as signalling NaNs
Dim l(1 To 2) As Double
'eliminate the positive and negative infinity
If IsPosInfinity(Val) Then Exit Function
If IsNegInfinity(Val) Then Exit Function
'Convert the 64 bit double to 2 longs represented as doubles
DeconstructDouble l, Val
'test for positive overflow
If l(2) >= USig(&H7FF00000) And l(2) <= USig(&H7FF7FFFF) Then
IsOverflow = True
ElseIf l(2) >= USig(&HFFF00000) And l(2) <= USig(&HFFF7FFFF) Then
'test for negative overflow
IsOverflow = True
End If
End Function
Public Function IsPosQNaN(Val As Double) As Boolean
'This function returns true for doubles that VBA recognises as
'1.#QNAN (quiet not a number)
'it returns false for any other doubles
Dim l(1 To 2) As Double
'Convert the 64 bit double to 2 longs represented as doubles
DeconstructDouble l, Val
'test for positive QNaN
IsPosQNaN = (l(2) >= USig(&H7FF80000)) And (l(2) <= USig(&H7FFFFFFF))
End Function
Public Function IsNegQNaN(Val As Double) As Boolean
'This function returns true for doubles that VBA recognises as
'-1.#QNAN (negative quiet not a number)
'it returns false for any other doubles
Dim l(1 To 2) As Double
'Convert the 64 bit double to 2 longs represented as doubles
DeconstructDouble l, Val
'test for negative QNaN
IsNegQNaN = (l(2) >= USig(&HFFF80000)) And (l(1) <> 0)
End Function
Public Function IsIndetermiate(Val As Double) As Boolean
'This function returns true for doubles that VBA recognises as
' -1.#IND (indeterminate)
'it returns false for any other doubles
Dim l(1 To 2) As Long
'Convert the 64 bit double to 2 longs
CopyMemory l(1), Val, 8
'test for indeterminate
IsIndetermiate = (l(2) = &HFFF80000) And ((l(1) = 0))
End Function
Public Function IsPosInfinity(Val As Double) As Boolean
'returns true if and only if Val is recognised by VBA as 1.#INF
Dim l(1 To 2) As Long
'Convert the 64 bit double to 2 longs
CopyMemory l(1), Val, 8
'Check for negative infinity
IsPosInfinity = (l(1) = 0) And (l(2) = &H7FF00000)
End Function
Public Function IsNegInfinity(Val As Double) As Boolean
'returns true if and only if Val is recognised by VBA as -1.#INF
Dim l(1 To 2) As Long
'Convert the 64 bit double to 2 longs
CopyMemory l(1), Val, 8
'Check for negative infinity
IsNegInfinity = (l(1) = 0) And (l(2) = &HFFF00000)
End Function
Public Function IsSpecial(Val As Double) As Boolean
'returns true if Val is represented by VBA as any of
'1.#INF,-1.#INF,-1.#IND,-1.#QNAN,1.#QNAN,<overflow>
'ie returns true if and only if any of the other functions return true
Dim l(1 To 2) As Double
'Convert the 64 bit double to 2 longs represented as doubles
DeconstructDouble l, Val
IsSpecial = ((l(2) >= USig(&H7FF00000)) And (l(2) < USig(&H80000000))) Or l(2) >= USig(&HFFF00000)
End Function
'****************************************************
'Utility Functions
'****************************************************
Private Sub DoubleFromHex(Part1 As Long, Part2 As Long, Oput As Double)
'convert a hex representation of a double into a double
'can be used to generate doubles otherwise inaccessible by vba
Dim l(1 To 2) As Long
l(1) = Part2
l(2) = Part1
CopyMemory Oput, l(1), 8
End Sub
Private Function USig(l As Long) As Double
'returns an unsigned value of a long as as double
If l < 0 Then
USig = 4294967296# + l
Else
USig = l
End If
End Function
Private Sub DeconstructDouble(Oput() As Double, Iput As Double)
'Splits the double's binary representation into 2 unsigned longs represented as doubles
Dim l(1 To 2) As Long
CopyMemory l(1), Iput, 8
Oput(1) = USig(l(1))
Oput(2) = USig(l(2))
End Sub