Gewerkt aan opdracht 4

Co-authored-by: Aryan Lala (19097727) <A.E.Lala@student.hhs.nl>

Opdracht_4/Observer/Observer.cpp

@@ -0,0 +1,13 @@
+#include "Observer.h"
+
+void Subject::notify ( ){
+for ( list<Observer*>::iterator i=L.begin( ); i!=L.end( ); ++i ) (*i)->update( );
+}
+
+Observer::Observer ( Subject* s ) : S(s){
+getSubject( )->insert(this);
+}
+
+Observer::~Observer ( ){
+getSubject( )->remove ( this );
+}

Opdracht_4/Observer/Observer.h

@@ -0,0 +1,26 @@
+#ifndef __Observer_H
+#define __Observer_H
+
+#include <list>
+
+using namespace std;
+
+class Subject;
+
+class Observer{
+    private: Subject* S;
+    protected: Subject* getSubject ( ) const { return S; }
+    public: Observer (Subject* s);
+        virtual ~Observer ( );
+        virtual void update ( ) = 0;
+};
+
+class Subject{
+    private: list<Observer*> L;
+    protected: virtual void notify ( );
+    public: Subject ( ) { }
+        virtual ~Subject ( ) { }
+        virtual void insert (Observer* s) { L.push_front(s); }
+        virtual void remove (Observer* s) { L.remove(s); }
+};
+#endif