C++ Primer Plus

Case 1: Derived Class Doesn’t Use new

Suppose you begin with the following base class that uses dynamic memory allocation:

//  Base Class Using DMAclass baseDMA{private:    char * label;    int rating;public:    baseDMA(const char * l = "null", int r = 0);    baseDMA(const baseDMA & rs);    virtual ~baseDMA();    baseDMA & operator=(const baseDMA & rs);...};

The declaration contains the special methods that are required when constructors use new: a destructor, a copy constructor, and an overloaded assignment operator.

Now suppose you derive a lackDMA class from baseDMA and that lackDMA does not use new or have other unusual design features that require special treatment:

// derived class without DMAclass lacksDMA :public baseDMA{private:    char ...