Default inheritance access specifier

Question

If I have for example two classes A and B, such that class B inherits A as follows:

class B: public A

Answer 1

When you inherit a class from another class, then default access specifier is private.

#include 

class Base {
public:
int x;
};

class Derived : Base { }; // is equilalent to class Derived : private Base       {}

int main()
{
 Derived d;
 d.x = 20; // compiler error becuase inheritance is private
 getchar();
 return 0;
}

When you inherit a structure from another class, then default access specifier is public.

#include < stdio.h >
  class Base {
    public:
      int x;
  };

struct Derived: Base {}; // is equilalent to struct Derived : public Base {}

int main() {
  Derived d;
  d.x = 20; // works fine becuase inheritance is public
  getchar();
  return 0;
}