Learning immediately: https://edu.csdn.net/course/play/474/5136?utm_source=blogtoedu
Often object definitions:
const class name object name [(argument list)]
Const object class name name [(argument list)]
Often the object must have the initial value
Chang member functions:
Const function name
Regular member functions can access the object's data members but often can not be changed
Often data can only be initialized by a member of the initialization parameter table constructor (and not assigned)
Often only the object type const member functions can be called, in addition to the implicit constructor and destructor functions
If you must modify the data members often object, it can be declared as mutable
