c++ 读取配置文件

void readNvidiaConf(map<string,string> &m_config)
{
    ifstream cfg_file;
    string path="./test.conf";
    cfg_file.open(path.c_str());
    string str_line;
    if(cfg_file.is_open())
    {
        while(!cfg_file.eof())
        {
          getline(cfg_file,str_line);
          if(str_line.find("#")==0)
            continue;
          size_t pos=str_line.find('=');
          string key=str_line.substr(0,pos);
          string value=str_line.substr(pos+1);
          m_config.insert(pair<string,string>(key,value));
        }
    }
    cfg_file.close();
}