字符串转16进制

c++字符串转16进制

  std::string  fromStringToHex( std::string _szData )
 {
    char *pcTemp = (char *)calloc(1UL, _szData.size() * 3 + 1);
    int iCurPos = 0;
    if (NULL != pcTemp)
    {
        for (int i = 0; i < _szData.size(); ++i)
        {
            iCurPos += sprintf(pcTemp + iCurPos, "%02X ", (unsigned char)_szData[i]);
        }
        pcTemp[iCurPos] = 0;
    }

    std::string szRet = std::string(pcTemp);
    free(pcTemp);
    retrun szRet;
}