A pointer to class C can point to an object of class C.  (No surprise)

     Car *cptr;
     cptr = new Car;


.... it can also point to an object of any subclass of C.

     class HybridCar : public Car {
     };

     Car *cptr;
     cptr = new HybridCar;

But not vice versa.  A pointer to a class SubC cannot point to a superclass object.

     class HybridCar : public Car {
     };

     HybridCar *hcptr;
     hcptr= new Car;  // won't compile!            

Assignment statements and subclasses

     class Account {
     private:
         double balance;
     };


     class NamedAccount: public Account { 
     private:
         char name[MAX];
     };

     Account acc;
     NamedAccount nacc;

     acc = nacc;  // slicing
     nacc = acc;  // not allowed

Back to cars ....
     Car *cptr;
     cptr = new HybridCar;

     Pointer type is ..... Car
          Object type is .....  Hybrid Car

          When we tell it to do something (accelerate / getFuelEfficiency/ etc.)
                      will it behave like a Car (pointer type) or a Hybrid Car  (object type)?

           Functions declared as virtual  behave according to the object type.
           Functions not declared as virtual behave according to the ptr type.