chat example added

examples/chat/display.cpp

@@ -0,0 +1,50 @@
+/*
+    Copyright (c) 2007-2009 FastMQ Inc.
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    0MQ is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <zmq.hpp>
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+
+int main (int argc, const char *argv [])
+{
+    //  Check the command line syntax.
+    if (argc != 2) {
+        fprintf (stderr, "usage: display <address>\n");
+        return 1;
+    }
+
+    //  Retrieve command line arguments
+    const char *address = argv [1];
+
+    //  Initialise 0MQ infrastructure.
+    zmq::context_t ctx (1, 1);
+    zmq::socket_t s (ctx, ZMQ_SUB);
+    s.setsockopt (ZMQ_SUBSCRIBE, "*", 1);
+    s.connect (address);
+    
+    while (true) {
+
+        //  Get a message and print it to the console.
+        zmq::message_t msg;
+        s.recv (&msg);
+        fprintf (stdout, "%s", (char*) msg.data ());
+        fflush (stdout);
+    }
+}