Filling in the example C client, too

zeromq/.gitignore

@@ -1 +1,2 @@
 hwserver
+hwclient

zeromq/Makefile

@@ -2,5 +2,15 @@ CFLAGS += -I. -I/usr/local/include
 LDFLAGS += -lstdc++ -lpthread -luuid -lrt
 
 
+all: hwserver hwclient
+
+
 hwserver: hwserver.c /usr/local/lib/libzmq.a
 	$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
+
+
+hwclient: hwclient.c /usr/local/lib/libzmq.a
+	$(CC) $(CFLAGS) -o $@ $^ $(LDFLAGS)
+
+
+.PHONY: all

zeromq/hwclient.c

@@ -0,0 +1,32 @@
+#include <zmq.h>
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+
+int main(void)
+{
+    void *context = zmq_init(1);
+
+    printf("Connecting to hello world server.\n");
+    void *requester = zmq_socket(context, ZMQ_REQ);
+    zmq_connect(requester, "tcp://localhost:5555");
+
+    int request_nbr;
+    for (request_nbr = 0; request_nbr != 10; request_nbr++) {
+        zmq_msg_t request;
+        zmq_msg_init_size(&request, 5);
+        memcpy(zmq_msg_data(&request), "Hello", 5);
+        printf("Sending Hello %d...\n", request_nbr);
+        zmq_send(requester, &request, 0);
+        zmq_msg_close(&request);
+
+        zmq_msg_t reply;
+        zmq_msg_init(&reply);
+        zmq_recv(requester, &reply, 0);
+        printf("Received World %d\n", request_nbr);
+        zmq_msg_close(&reply);
+    }
+    zmq_close(requester);
+    zmq_term(context);
+    return 0;
+}