C++ programming:

In Chapter 1, the class clockType was designed to implement the time of day in a program. Certain applications, in addition to hours, minutes, and seconds, might require you to store the time zone. Derive the class extClockType from the class clockType by adding a data member to store the time zone. Add the necessary member functions and con- structors to make the class functional. Also, write the definitions of the member functions and the constructors. Finally, write a test program to test your class.