CLASS vs. OBJECT and memory management

[Super Vegeta]

By the way, using an array of OBJECTs prevents you to use virtual methods, as all OBJECT on the array will be the same type.

Not really. When using virtual methods, each object must also contain a "secret" member that points to the VMT. Setting up this pointer is done by the constructor, so if you typecast some of the objects in the array and call the child constructor on them, the VMT will be properly initialized to that of the child class. One important thing to note here, though, is that the descendant classes cannot declare any new fields, since they would be located after the base class data, thus accessing them would go past the base class memory area and mess stuff up in the next array member.