小编bit*_*ber的帖子

根据MSDN,Short数据类型由两个字节组成:https://msdn.microsoft.com/en-us/library/47zceaw7.aspx

但是如果我定义一个Short变量,内容总是4个字节:&HFFFFFFFF

Dim crc As Short = CShort(&HFFFFS) ' crc = &HFFFFFFFF
Dim crc As Short = &HFFFFS         ' crc = &HFFFFFFFF

这句话甚至给我一个错误:

Dim crc As Short = CShort(&HFFFF) ' Error: Constant expression not representable in type 'Short'

这有什么用？为什么我Short不占用两个字节？

MWE补充道:

Public Function CRC16(ByVal dataFrame As Byte(), ByVal dataLength As Int16) As Int16

    Dim index As Int16
    Dim crc As Short = &HFFFFS

    For iCount As Int16 = 0 To CShort(dataLength - …