vb.net16进制浮点,vb浮点数转十六进制
如何用VB.NET将单精度16进制转换成浮点数
#读取上次检查到的行数
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last_line=`cat ./mailinfo`
echo "上次行数："$last_line
#算出本次alert日志的行数
current_line=`wc -l $alert_log|awk '{print $1}'`
echo "本次行数："$current_line
#取上次行数和本次行数之间的alert日志内容，然后把ORA错误及上下三行放到mailinfo中
vb如何将浮点数的十六进制数转化为十进制数据
使用API函数CopyMemory来转换。
Option Explicit
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)
Private Sub Command1_Click()
Dim BB(0 To 3) As Byte
Dim se As Single
BB(0) = H0
BB(1) = H80
BB(2) = H71
BB(3) = H43
CopyMemory se, ByVal VarPtr(BB(0)), 4
Text1.Text = se
End Sub
具体参考：
vb.net 4位十六进制 转浮点数
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
Dim aa(3) As Byte
Dim f As Single
aa(0) = H0
aa(1) = H0
aa(2) = H80
aa(3) = H3F
'CopyMemory(f, aa, 4)
f = BitConverter.ToSingle(aa, 0)
TextBox1.Text = f
End Sub
End Class
VB把浮点数变为十六进制怎么办？
'//首先，在工程中加入心缘梦恋VB计算类模块“bMaths”'//'//全局定义Private B1 As New bMaths'//在窗体中写入自定义函数：Private Function HexToFloat(ByVal Hexadecimal As String) As Single
Dim tmp_B As String
tmp_B = B1.Bin(Text1(2).Text)
'
Dim Power As Integer, Effective As Long, s_Effective As String, PN As Byte
'//幂（Power）；Effective（有效数）；PN（正负定义）
Power = Val("H" B1.HexB(Mid(tmp_B, 2, 8))) - 127
s_Effective = Right(tmp_B, 23)
s_Effective = "1" s_Effective
Select Case Power
Case Is 0
Power = 0 - Power
Effective = Val("H" B1.HexB(s_Effective))
PN = Val(Left(tmp_B, 1))
HexToFloat = ((-1) ^ PN) * (Effective / (2 ^ (23 + Power)))
Case Is = 0
Dim s_Front As String, s_Follow As String
s_Front = Left(s_Effective, 1 + Power)
s_Follow = Right(s_Effective, 23 - Power)
PN = Val(Left(tmp_B, 1))
HexToFloat = ((-1) ^ PN) * (Val("H" B1.HexB(s_Front)) + Val("H" B1.HexB(s_Follow)) / (2 ^ (23 - Power)))
End Select
End Function'//'//调用函数HexToFloat，将十六进制数值转化为浮点型数据'//例如，将“43730000”转化为浮点型数据Private Sub Form_Load()
Debug.Print HexToFloat("43730000")
End Sub'//输出结果：“243”'//'//特别提醒：此段函数还没有考虑浮点数据的科学计数法。不过，这段函数在一般情况下已经够用了。如果还有好的建议，您可以加入我们的群（ID：18858430），一起探讨。
名称栏目：vb.net16进制浮点,vb浮点数转十六进制
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