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Give the definition of a class named Doctor whose objects are records for aclinic’s doctors. This class will be a derived class of the class SalariedEmployee given in Display 15.5. A Doctor record has the doctor’s specialty (such as “Pediatrician,” “Obstetrician,” “General Practitioner,” etc., so use type string) and office visit fee (use type double). Be sure your class has a reasonable complement of constructors, accessor, and mutator member functions, an overloaded assignment operator, and a copy constructor. Write a driver program to test all your functions.
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