Program to computerize the billing system of a hospital

In this exercise you will design various classes and write a program to computerize the billing system of a hospital. A. Design the class doctorType, inherited from the class personType, with an additional data member to store doctors speciality. Add appropriate
constructors and member functions to initialize, access, and manipulate the data members. B. design the class billtype with data members to store patients Id and patients hospital charges. Add appropriate constructors and member functions to initialize, access
and manipulate the data members. C. Design the class patienttype , inherited from the class personType, with additional data members to store a patients Id, age, date of birth, attending physicians name, and the date the patient was discharged from the hospital.
Use the class date type to store the date of birth, admit date, discharge date, and class doctorType, to store attending physicians name. Add appropriate constructors and member functions to initialize, access and manipulate the data members. I am using Microsoft
Visual Studio 2010