16进制转为16进制的string

static string Hex2String(const char *pBuffer, int iBytes)  //转为16进制的string，便于打印{    string result;    for (int i=0; i<iBytes; i++)    {        unsigned char c;        unsigned char b = pBuffer[i] >> 4;        b &= 0x0f;        if (9 >= b)        {            c = b + '0';        }        else        {            c = (b-10) + 'A';        }        result += (unsigned char)c;        b = pBuffer[i] & 0x0f;        if (9 >= b)        {            c = b + '0';        }        else        {            c = (b-10) + 'A';        }        result += (unsigned char)c;        result += ' ';    }    return result;}