ios_base::ios_base


constructor member
protected: ios_base ();
  private: ios_base (const ios_base&);

Construct object

ios_base objects have indeterminate values on construction. Each ios_base base object shall be initialized with ios::init.

Because the constructors are protected and private, this class cannot be directly instantiated: only objects of derived classes can be created.

ios_base also declares an assignment operator member function. Like the copy constructor, this function is also private:

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private:
  ios_base (const ios_base&);
  ios_base& operator= (const ios_base&);


This effectively also prevents ios_base objects to be copied.