May 2003
Intermediate to advanced
808 pages
32h 24m
English
private access specifier — Restricts member access to the class
access-specifier := privateThe private keyword can be
used within a class definition (followed by a colon) to mark
subsequent member declarations as private or before a base-class name
in the class header to mark the inheritance as private. The default
access level of a class is private,
both for members and base classes.
Private members can be used by the class itself or by friends.
Private inheritance means all public and protected members in the base class are private to the derived class.
class rational {public:
rational(int n, int d) : num_(n), den_(d) { reduce( ); }
rational( ) : num_(0), den_(1) {}
int num( ) const { return num_; }
int den( ) const { return den_; }
protected:
void reduce( ); // Reduce num_ and den_ by gcd.
private:
int num_, den_;
};
class derived : public rational {};
class myrational : private rational {
public:
using rational::num;
using rational::den;
};class, protected, public, struct, Chapter 6