All the class members declared under public will be available to everyone. The data members and member functions declared public can be accessed by other classes too. The public members of a class can...All the class members declared under public will be available to everyone. The data members and member functions declared public can be accessed by other classes too. The public members of a class can be accessed from anywhere in the program using the direct member access operator (.) with the object of that class. // class definition class Circle { public: double radius; In the above program the data member radius is public so we are allowed to access it outside the class.