c++ - reading from boost asio socket and printing to terminal -

i want use boost asio sockets send message server client , print out client terminal. trying send message "hello". doesn't work. how can fix this? thanks!

client:

#include <boost/asio.hpp> #include <iostream> #include <string> using namespace std; int main (int argc, char* argv[]) {  try {   boost::asio::io_service io_service;   boost::asio::ip::tcp::resolver::query query("localhost", "41005");   boost::asio::ip::tcp::resolver resolver(io_service);   boost::asio::ip::tcp::resolver::iterator destination = resolver.resolve(query);   boost::asio::ip::tcp::resolver::iterator end ;   boost::asio::ip::tcp::endpoint endpoint;     while ( destination != end ) {      endpoint = *destination++;      std::cout<<endpoint<<std::endl;   }    boost::asio::ip::tcp::socket socket(io_service);   socket.connect(endpoint);   boost::array< char, 128 > buf;   boost::system::error_code error;   std::size_t length = boost::asio::read(socket, boost::asio::buffer(buf, 512), boost::asio::transfer_all(), error);   cout << length;  }  catch (std::exception& e)  {    std::cerr << e.what() << std::endl;  }  return 0; } 

server:

#include <boost/asio.hpp> #include <iostream> #include <string> using namespace std;  int main () {  try {   boost::asio::io_service io_service;   boost::asio::ip::tcp::acceptor acceptor(io_service, boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), 41005));    (; ;) {      std::cout<<"listening to"<<std::endl;      boost::asio::ip::tcp::socket socket(io_service);      acceptor.accept(socket);       std::string message = "hello";      boost::system::error_code ignored_error;      boost::asio::write(socket, boost::asio::buffer(message), boost::asio::transfer_all(), ignored_error);   } } catch (std::exception& e) {   std::cerr << e.what() << std::endl; } return 0; 

}

classic error: "acceptor.accept" method blocking call, hello part never called.

our cout friend you, allways:

... std::cout<<"sending hello"<