I of course tried this, but I asked this because I didn't know what to put in the constructor
[source lang="cpp"]Menu::Menu(){subMenu=new Menu()//??}[/source]
If you define an object type which invokes its own constructor within its constructor (like you've done above) it creates an infinite recursion, which is similar to an endless loop. Example ::
[source lang="cpp"]class MyClass{public: MyClass() { myClass = new MyClass(); } MyClass *myClass;};void main() { MyClass* mc = new MyClass;}[/source]
As soon as the "main" function of this program starts it creates a new MyClass instance and invokes its constructor with the new operator... and then what happens? Control jumps to the MyClass constructor, MyClass::MyClass()... but the code in the constructor AGAIN invokes the constructor with the new operator, in an attempt to instantiate the myClass instance... but that myClass instance will have its own myClass instance too lol... So the constructor is invoked again, and again and again and never stops... at least not until you terminate the program! ;-)
A better way to handle this dilemma is allow the constructor in your program to take a Menu* parameter for its sub-menu... let outside code create the sub-menu (if the menu has one) and pass it to the new, primary menu instance. Alternatively you could offer a static (or even an instance) method in the Menu class, like [static] Menu::AddSubMenu(Menu* primary, <creation params> ) or [instance] Menu::AddSubMenu(...) and let that method handle adding the sub-menu to the primary menu...