aggiunta logica di gestione dati. Assistito con ai

include/windowsDeclaration.h

@@ -8,6 +8,11 @@
 
 int runMainMenu();
 void runOptionsMenu();
+void runSellWindow();
+void runAboutWindow();
+void runViewSalesWindow();
+void runViewProductsWindow();
+void runAddProductWindow();
 void example_window();
 
 #endif