Question

The pointer of derived class returned by new can be type cast to the pointer of its base class.

Is this true or false?

I know dynamic_cast can be used to cast downside. Generally, how to cast a pointer of derived class to a pointer of its base class?

Answer 1

Yes. Conversion from a pointer to a derived class to a pointer to a base class is implicit. Thus, the following is perfectly fine:

struct B { };
struct D : B { };

D* my_d_ptr = new D;
B* my_d_ptr_as_a_b_ptr = my_d_ptr;