Introduction - If you have any usage issues, please Google them yourself
Design of class, choose 1: the design of a People for the personnel management (personnel) class.
In view of universality, here only abstracts properties of all types of personnel have the:
Number (serial number), sex (sex), birthday (date of birth), ID (ID) etc..
The date of birth the statement as a date class of embedded objects. A member function to achieve the personnel information input and display.
Requirements include at least: the constructor and destructor, copy constructor.