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From the data-type perspective,
new internally generates a
pointer which is said to be of type void*. Such pointers have
the property that they can be cast into pointers of any type.
Then, if the new expression is new double, the void*
pointer is cast automatically into a object of type double*, which
is a pointer a double object. Analogously, if the new
expression is new cylinder, the void* pointer is cast
automatically into a pointer to an object of type cylinder*, which
is a pointer to a cylinder object.