C++ 扫描文件夹下所有文件

void GetFilesFromDirectory(std::vector<std::string> &files, const char *directoryPath)
{
    struct _finddata_t fileinfo;
    long hFile = ;
    char tmpPath[MAX_PATH] = {  };
    sprintf_s(tmpPath, "%s\\*", directoryPath);
    if ((hFile = _findfirst(tmpPath, &fileinfo)) == -){ return; }
    do
    {
        if ((fileinfo.attrib &  _A_SUBDIR))
        {
            if (strcmp(fileinfo.name, ".") !=  && strcmp(fileinfo.name, "..") != )
            {
                sprintf_s(tmpPath, "%s\\%s", directoryPath, fileinfo.name);
                GetFilesFromDirectory(files, tmpPath);
            }
        }
        else
        {
            sprintf_s(tmpPath, "%s\\%s", directoryPath, fileinfo.name);
            files.push_back(tmpPath);
        }
    } while (_findnext(hFile, &fileinfo) == );
    _findclose(hFile);
}