思路:
①负数转换为正数;例:-5,先转换成5(0000 0101);第一位标识正负
②先将十进制转换为二进制通过;例:将5转换为二进制,得到结果0000 0101
③求反码;例:将上面例子求反码,得到结果:1111 1010(即0变成1,1变0)
④求补码;例:将第四步结果求补码,得到结果:1111 1011(最后一位加1)
⑤转十六进制;1111 1011转十六进制即得:FB
/// 负数转十六进制
/// </summary>
/// <param name="iNumber"></param>
/// <returns></returns>
private string NegativeToHexString(int iNumber)
{
string strResult = string.Empty;
if (iNumber < 0)
{
iNumber = -iNumber;
string strNegate = string.Empty;
char[] binChar = Convert.ToString(iNumber, 2).PadLeft(8, '0').ToArray();
foreach (char ch in binChar)
{
if (Convert.ToInt32(ch) == 48)
{
strNegate += "1";
}
else
{
strNegate += "0";
}
}
int iComplement = Convert.ToInt32(strNegate,2) + 1;
strResult = Convert.ToString(iComplement, 16).ToUpper();
}
return strResult;
}
/// 十六进制转为负数
///</summary>
///<param name="strNumber"></param>
///<returns></returns>
privateint HexStringToNegative(string strNumber)
{
int iNegate = 0;
int iNumber = Convert.ToInt32(strNumber, 16);
if (iNumber > 127)
{
int iComplement = iNumber - 1;
string strNegate = string.Empty;
char[] binChar = Convert.ToString(iComplement, 2).PadLeft(8, '0').ToArray();
foreach (char ch in binChar)
{
if (Convert.ToInt32(ch) == 48)
{
strNegate += "1";
}
else
{
strNegate += "0";
}
}
iNegate = - Convert.ToInt32(strNegate, 2);
}
return iNegate;
}