implement subscribe in STOMP

main.cpp

@@ -26,5 +26,11 @@ int main(int argc, char *argv[]) {
         {"login", "sdi10"},
         {"passcode", "809c02f36becb0868da98761fe3209f6"}
     }).send(socket);
+
+
+
+    STOMPFrame(STOMPFrame::MESSAGE, {
+        {},
+    }).send(socket);
     return application.exec();
 }

stomp.cpp

@@ -4,7 +4,7 @@ Stomp::Stomp() {
 
 }
 
-bool Stomp::subscribe(interface::iStompObserver obs) {
+bool Stomp::subscribe(interface::iStompObserver* obs) {
     for(int i = 0; i < MAX_OBSERVER; i++) {
         if (observer_[i] == nullptr) {
             observer_[i] = obs;
@@ -12,5 +12,6 @@ bool Stomp::subscribe(interface::iStompObserver obs) {
         }
     }
     return false;
+}