测试2

void client(io_service &ios, deadline_timer &timer, const system::error_code &ec)
{
    try{
        cout << "client start." << endl;

        ip::tcp::socket _sock(ios);
        ip::tcp::endpoint ep(ip::address::from_string("127.0.0.1"), 6688);

        _sock.connect(ep);

        vector<char> str(100, 0);
        _sock.read_some(buffer(str));

        cout << "recive from " << _sock.remote_endpoint().address();
        cout << &str[0] << endl;

        timer.async_wait(bind(client, ref(ios), ref(timer), placeholders::error));
    }
    catch(std::exception &e)
    {
        cout << e.what() << endl;
    }
}

int main(int argc, _TCHAR* argv[])
{
    io_service ios;
    deadline_timer timer(ios, posix_time::seconds(2));
    timer.async_wait(bind(client, ref(ios), ref(timer), placeholders::error));

    ios.run();
    getchar();
    return 0;
}