VB中各种进制的转换
发表于 2007-3-2 16:31:39
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' 用途：将十进制转化为二进制 ' 输入：Dec(十进制数) ' 输入数据类型：Long
' 输出：DEC_to_BIN(二进制数) ' 输出数据类型：String
' 输入的最大数为2147483647,输出最大数为1111111111111111111111111111111(31个1) Public Function DEC_to_BIN(Dec As Long) As String DEC_to_BIN = \ Do While Dec > 0
DEC_to_BIN = Dec Mod 2 & DEC_to_BIN Dec = Dec \\ 2 Loop End Function
' 用途：将二进制转化为十进制 ' 输入：Bin(二进制数) ' 输入数据类型：String ' 输出：BIN_to_DEC(十进制数) ' 输出数据类型：Long
' 输入的最大数为1111111111111111111111111111111(31个1),输出最大数为2147483647 Public Function BIN_to_DEC(ByVal Bin As String) As Long Dim i As Long For i = 1 To Len(Bin)
BIN_to_DEC = BIN_to_DEC * 2 + Val(Mid(Bin, i, 1)) Next i End Function
' 用途：将十六进制转化为二进制 ' 输入：Hex(十六进制数) ' 输入数据类型：String ' 输出：HEX_to_BIN(二进制数) ' 输出数据类型：String
' 输入的最大数为2147483647个字符
Public Function HEX_to_BIN(ByVal Hex As String) As String Dim i As Long Dim B As String
Hex = UCase(Hex) For i = 1 To Len(Hex) Select Case Mid(Hex, i, 1)
Case \B = B & \ Case \B = B & \ Case \B = B & \ Case \B = B & \ Case \B = B & \ Case \B = B & \ Case \B = B & \ Case \B = B & \ Case \B = B & \ Case \B = B & \ Case \B = B & \ Case \B = B & \ Case \B = B & \ Case \B = B & \ Case \B = B & \ Case \B = B & \ End Select Next i
While Left(B, 1) = \ B = Right(B, Len(B) - 1) Wend
HEX_to_BIN = B End Function
' 用途：将二进制转化为十六进制 ' 输入：Bin(二进制数) ' 输入数据类型：String
' 输出：BIN_to_HEX(十六进制数) ' 输出数据类型：String
' 输入的最大数为2147483647个字符
Public Function BIN_to_HEX(ByVal Bin As String) As String Dim i As Long Dim H As String
If Len(Bin) Mod 4 <> 0 Then
Bin = String(4 - Len(Bin) Mod 4, \& Bin End If
For i = 1 To Len(Bin) Step 4 Select Case Mid(Bin, i, 4) Case \H = H & \ Case \H = H & \ Case \H = H & \ Case \H = H & \ Case \H = H & \
Case \H = H & \ Case \H = H & \ Case \H = H & \ Case \H = H & \ Case \H = H & \ Case \H = H & \ Case \H = H & \ Case \H = H & \ Case \H = H & \ Case \H = H & \ Case \H = H & \ End Select Next i
While Left(H, 1) = \ H = Right(H, Len(H) - 1) Wend
BIN_to_HEX = H End Function
' 用途：将十六进制转化为十进制 ' 输入：Hex(十六进制数) ' 输入数据类型：String
' 输出：HEX_to_DEC(十进制数) ' 输出数据类型：Long
' 输入的最大数为7FFFFFFF,输出的最大数为2147483647 Public Function HEX_to_DEC(ByVal Hex As String) As Long Dim i As Long Dim B As Long
Hex = UCase(Hex) For i = 1 To Len(Hex)
Select Case Mid(Hex, Len(Hex) - i + 1, 1) Case \B = B + 16 ^ (i - 1) * 0 Case \B = B + 16 ^ (i - 1) * 1 Case \B = B + 16 ^ (i - 1) * 2 Case \B = B + 16 ^ (i - 1) * 3 Case \B = B + 16 ^ (i - 1) * 4 Case \B = B + 16 ^ (i - 1) * 5 Case \B = B + 16 ^ (i - 1) * 6 Case \B = B + 16 ^ (i - 1) * 7 Case \B = B + 16 ^ (i - 1) * 8 Case \B = B + 16 ^ (i - 1) * 9 Case \B = B + 16 ^ (i - 1) * 10 Case \B = B + 16 ^ (i - 1) * 11
Case \B = B + 16 ^ (i - 1) * 12 Case \B = B + 16 ^ (i - 1) * 13 Case \B = B + 16 ^ (i - 1) * 14 Case \B = B + 16 ^ (i - 1) * 15 End Select Next i
HEX_to_DEC = B End Function
' 用途：将十进制转化为十六进制 ' 输入：Dec(十进制数) ' 输入数据类型：Long
' 输出：DEC_to_HEX(十六进制数) ' 输出数据类型：String
' 输入的最大数为2147483647,输出最大数为7FFFFFFF Public Function DEC_to_HEX(Dec As Long) As String Dim a As String DEC_to_HEX = \ Do While Dec > 0 a = CStr(Dec Mod 16) Select Case a Case \a = \ Case \a = \ Case \a = \ Case \a = \ Case \a = \ Case \a = \ End Select
DEC_to_HEX = a & DEC_to_HEX Dec = Dec \\ 16 Loop End Function
' 用途：将十进制转化为八进制 ' 输入：Dec(十进制数) ' 输入数据类型：Long
' 输出：DEC_to_OCT(八进制数) ' 输出数据类型：String
' 输入的最大数为2147483647,输出最大数为17777777777 Public Function DEC_to_OCT(Dec As Long) As String DEC_to_OCT = \ Do While Dec > 0
DEC_to_OCT = Dec Mod 8 & DEC_to_OCT Dec = Dec \\ 8 Loop
End Function
' 用途：将八进制转化为十进制 ' 输入：Oct(八进制数) ' 输入数据类型：String
' 输出：OCT_to_DEC(十进制数) ' 输出数据类型：Long
' 输入的最大数为17777777777,输出的最大数为2147483647 Public Function OCT_to_DEC(ByVal Oct As String) As Long Dim i As Long Dim B As Long
For i = 1 To Len(Oct)
Select Case Mid(Oct, Len(Oct) - i + 1, 1) Case \B = B + 8 ^ (i - 1) * 0 Case \B = B + 8 ^ (i - 1) * 1 Case \B = B + 8 ^ (i - 1) * 2 Case \B = B + 8 ^ (i - 1) * 3 Case \B = B + 8 ^ (i - 1) * 4 Case \B = B + 8 ^ (i - 1) * 5 Case \B = B + 8 ^ (i - 1) * 6 Case \B = B + 8 ^ (i - 1) * 7 End Select Next i
OCT_to_DEC = B End Function
' 用途：将二进制转化为八进制 ' 输入：Bin(二进制数) ' 输入数据类型：String ' 输出：BIN_to_OCT(八进制数) ' 输出数据类型：String
' 输入的最大数为2147483647个字符
Public Function BIN_to_OCT(ByVal Bin As String) As String Dim i As Long Dim H As String
If Len(Bin) Mod 3 <> 0 Then
Bin = String(3 - Len(Bin) Mod 3, \& Bin End If
For i = 1 To Len(Bin) Step 3 Select Case Mid(Bin, i, 3) Case \H = H & \ Case \H = H & \