Added example aoutput.

typefactory/main.cpp

@@ -35,8 +35,8 @@ int main() {
   auto a = factory.create ("one", 10);
   auto b = factory.creator ("two") (10); // advanced API: get creator function
 
-  (void)a->get();
+  std::cout << a->get() << std::endl;
-  (void)b->get();
+  std::cout << b->get() << std::endl;
 
   return 0;
 }