思路:
①負數轉換為正數;例:-5,先轉換成5(0000 0101);第一位標識正負
②先將十進位轉換為二進位通過;例:將5轉換為二進位,得到結果0000 0101
③求反碼;例:將上面例子求反碼,得到結果:1111 1010(即0變成1,1變0)
④求補碼;例:將第四步結果求補碼,得到結果:1111 1011(最後一位加1)
⑤轉十六進位;1111 1011轉十六進位即得:FB
/// <summary>
/// 負數轉十六進位
/// </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;
}
/// <summary>
/// 十六進位轉為負數
///</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;
}