Not sure if noob question... Or real problem

[Tytan]

(Sorry for the no-info-title lol.)

Hi! I have a server, and a client program, bothcompile and connect to each other fine, I can connect multiple users and all the good stuff...
But when I try to send data to the server from one of the clients, I need to put 10 characters infront of the message I want to send, otherwise the data is corrupt.
Does anyone know the cause of this madness?

Client (Only posted main loop)

(click to show/hide)

while (true)
   {
      //Connecting to server
      if (!online)
      {
         cout << "Attempting to connect to server (" + ip + " " + std::to_string(port) + ")." << std::endl;
         socket.connect(ip, port);
         if (socket.getRemoteAddress() != sf::IpAddress::None)   // If remote IP Address DOES NOT = NULL we are connected to server
         {
            online = true;
            cout << "Connected to server successfully!" << std::endl;
         }
         else    // Otherwise we are not connected
         {
            online = false;
            cout << "Could not connect to server!" << std::endl;
         }
      }

      getline(cin, input);

      socket.send(input.c_str(), sizeof(input), bytes_sent);
      while (bytes_sent != sizeof(input))
      {
         socket.send(std::to_string(input.at(bytes_sent)).c_str(), sizeof(input.c_str()), bytes_sent);
      }
   }

Server (only posted mian loop)

(click to show/hide)

      for (unsigned int i = 0; i < clients.size(); i++) //For loop that iterates though each client, receives data and deals with that data
      {
         clients.setBlocking(false);

         // Check to see if client is still connected
         if (clients.receive(buffer, 10, received) == sf::Socket::Disconnected)
         {
            std::cout << "User #" << i << " has discconected and has been removed from the user list" << std::endl;
            clients.disconnect();
            numClients--;
            continue;
         }

         if (clients.receive(buffer, sizeof(buffer), received) != sf::Socket::Done) //Receives data (and checks if data was fully received)
         {
         }
         else
         {
            if (received > 0) //Checks if data was received.
            {
               std::cout << "Received \"" << buffer << "\" From IP " << clients.getRemoteAddress().getPublicAddress() << std::endl; //Prints received string
               //clients.send(serverState.c_str(), serverState.length(), bytes_sent);
               //while (bytes_sent != sizeof(serverState))
               //{
               //   clients.send(serverState.c_str(), sizeof(serverState.c_str()), bytes_sent);
               //}
            }
         }
      }

All information will be useful

[Laurent]

Replace sizeof(input) with input.size().