Conversion between a derived class object and a base class object in private inheritance

Class base {}; class child: Private base // The same is true for protected. {};

Therefore, Child C; Base B = C; this is not allowed. Base B = C; it indicates that the Base Class Object in C is assigned to B, but the base class object in child is private and cannot be accessed.

If it is changed to public, you can.

In private inheritance, I know the object of the derived class. Is there any way to access the object of its base class? Of course, because its memory is in the object of the derived class.

# Include <stdio. h ># include <iostream> using namespace STD; class base {public: int s; base (): S (1000) {}; void test () {cout <S <"base" <Endl ;}}; class child: Private base {}; int main () {Child C; base * B = reinterpret_cast <base *> (& C); // forced conversion. B-> test (); getchar ();}