Added some console outputs to use library.

genericcore.cpp

@@ -1,3 +1,19 @@
 #include "genericcore.h"
 
-GenericCore::GenericCore() {}
+#include <iostream>
+using namespace std;
+
+GenericCore::GenericCore()
+{
+    cout << "Creating core..." << endl;
+}
+
+GenericCore::~GenericCore()
+{
+    cout << "Destroying core..." << endl;
+}
+
+void GenericCore::sayHello() const
+{
+    cout << "Hello from the core!" << endl;
+}

genericcore.h

@@ -5,6 +5,9 @@ class GenericCore
 {
 public:
     GenericCore();
+    ~GenericCore();
+
+    void sayHello() const;
 };
 
 #endif // GENERICCORE_H