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POzeromq conversion between datatypes
 

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    <p>Hello I am trying to understand and learn how to work with ZeroMQ and while this could be basic, I didn't find a way to fix it. In this code, I am trying to create a server to forward messages from one client to another one. The server compiled just fine but there are some major issues (almost all of them regarding datatypes) so I couldn't even test my server.</p> <p><strong>server.cpp:</strong></p> <pre><code>#include "zmq.hpp" #include &lt;string&gt; #include &lt;iostream&gt; #include &lt;unistd.h&gt; int main () { zmq::message_t board (9); zmq::context_t context (1); zmq::socket_t socket1 (context, ZMQ_REP); socket1.bind ("tcp://*:20000"); zmq::socket_t socket2 (context, ZMQ_REP); socket1.bind ("tcp://*:20001"); int jogo=9; while (jogo) { zmq::message_t request; if (jogo%2!=0) { socket1.recv (&amp;request); memcpy ((void *) board.data (), request.data(), 9); socket2.send (board); } else { socket2.recv (&amp;request); memcpy ((void *) board.data (), request.data(), 9); socket1.send (board); } --jogo; } return 0; } </code></pre> <p><strong>jogo_client.cpp</strong></p> <pre><code>#include "zmq.hpp" #include &lt;string&gt; #include &lt;iostream&gt; int main () { int player,port=20000,jogo=9,ganhou=0; std::string game; std::cin &gt;&gt; player; port+=player; zmq::context_t context (1); zmq::socket_t socket (context, ZMQ_REQ); std::cout &lt;&lt; "Connecting to game server…" &lt;&lt; std::endl; //-std=gnu++11 socket.connect (std::string("tcp://localhost:")+std::to_string(port)); zmq::message_t board (9); if(player) { while(jogo) { if (jogo%2!=0) { memcpy ((void *) board.data (), "Hi from 1", 9); std::cout &lt;&lt; "Sending Hi" &lt;&lt; std::endl; socket.send (board); } else { socket.recv (&amp;board); memcpy ((void *) ,game, request.data (), 9); std::cout &lt;&lt; "Got from 2: " &lt;&lt; std::endl; std::cout &lt;&lt; game &lt;&lt; std::endl; } --jogo; } } else { while(jogo) { if (jogo%2!=0) { socket.recv (&amp;board); memcpy ((void *) ,game, request.data (), 9); std::cout &lt;&lt; "Getting from 2 " &lt;&lt; std::endl; std::cout &lt;&lt; game &lt;&lt; std::endl; } else { emcpy ((void *) board.data (), "Hi from 2", 9); std::cout &lt;&lt; "Sending Hi" &lt;&lt; std::endl; socket.send (board); } --jogo; } } return 0; } </code></pre> <p>compile errors:</p> <pre><code>jogo_client.cpp: In function ‘int main()’: jogo_client.cpp:14:73: error: no matching function for call to ‘zmq::socket_t::connect(std::basic_string&lt;char&gt;)’ jogo_client.cpp:14:73: note: candidate is: In file included from jogo_client.cpp:1:0: zmq.hpp:384:21: note: void zmq::socket_t::connect(const char*) zmq.hpp:384:21: note: no known conversion for argument 1 from ‘std::basic_string&lt;char&gt;’ to ‘const char*’ jogo_client.cpp:29:26: error: expected primary-expression before ‘void’ jogo_client.cpp:29:26: error: expected ‘)’ before ‘void’ jogo_client.cpp:43:26: error: expected primary-expression before ‘void’ jogo_client.cpp:43:26: error: expected ‘)’ before ‘void’ </code></pre>
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