一个同步的传输的程序

client端：
//定义一个socket,连接本机
      asio::io_service io_service;
        tcp::resolver resolver(io_service);
        tcp::resolver::query query("127.0.0.1", "13");
        tcp::resolver::iterator endpoint_iterator = resolver.resolve(query);
        tcp::resolver::iterator end;
        tcp::socket socket(io_service);
        io_service.run();
        socket.close();
//连接
        std::cout << "prepare to connect" << std::endl;
        socket.async_connect(*endpoint_iterator++, test);
        std::cout << "connect end" << std::endl;
        std::string s = socket.remote_endpoint().address().to_string();
        std::cout << s << std::endl;
        char buf[128];
        Sleep(2000);
        for (;;)
        {
//得到数据
            Sleep(2000);
            memset(buf, 0, 128);
            size_t len = socket.read_some(asio::buffer(buf));
            std::cout << "read finished" << std::endl;
                f<< buf << std::endl;   
        }

server的代码差不多，就是read_some 改成 write_some....

想尝试 异步的，async_read, async_write....然后就出问题了。。。sigh....
不知道是什么原因