What is the difference between class and object?
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Answer Posted / johncz
Class is a template for the custom type that can be used as
variable. It defines types of data that class contains and
the set of functions to manipulate those data types. It is
just a recipe to be used when class is instantiated.
Object is an entity created using class template. Such an
object occupies computer’s memory. Each object of the class
is independent entity.
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Question: Implement a base class Appointment and derived classes Onetime, Daily, Weekly, and Monthly. An appointment has a description (for example, “see the dentist”) and a date and time. Write a virtual function occurs_on(int year, int month, int day) that checks whether the appointment occurs on that date. For example, for a monthly appointment, you must check whether the day of the month matches. Then fill a vector of Appointment* with a mixture of appointments. Have the user enter a date and print out all appointments that happen on that date.
