message Configure

{

    required string host = ;

    required uint32 port = ;

}

Configure config;

config.set_host("127.0.0.1");
config.set_port(8080);

string contect;

google::protobuf::TextFormat::PrintToString(config, & contect);

ofstream fout;

fout.open("config.cfg", ios::out| ios_base::ate);

if (!fout.is_open())

{

    fprintf(stderr, "open config.cfg fail\n");

    return -;

}

fout << contect <<endl;

fout.flush();

fout.close();

int fd = open("config.cfg", O_RDONLY);

if (fd < )

{

    printf("open config.cfg failure:%s \n",strerror(errno));

    return false;

}

google::protobuf::io::FileInputStream fileInput(fd);

fileInput.SetCloseOnDelete(true);

google::protobuf::TextFormat::Parse(&fileInput, &config);