Accessing the object

The second statement in the function named classMain reads as follows:

ptrToObject -> doSomething();

In layman's terms, this is what that statement means:

• Go to the pigeon hole in memory named ptrToObject and extract a copy of the address that you will find there.  (This is analogous to going to the county tax office to learn the address of a particular house.)
• Go to the location in memory that corresponds to that address.  There you will find the object.  (This is analogous to driving to the location of the house at the address that you got from the county tax office.)
• Knock on the door of the object.  When the person who lives there answers the door, ask her to execute her public function named doSomething, which she will do.  (This is analogous to knocking on the door of the house and asking the occupant to do something.  In the real world, however, she may refuse to do what you ask.)