Introduction - If you have any usage issues, please Google them yourself
1. To design a time-type (year, month, day, hour, minute) the design of a notification type, including time, place and incident time to time which kind of object notice category contains constructor, enter the notice and print notice function and other functions. Tested in the main program. 2. The design of a rectangular-type, data members are diagonal vertex. Rectangular type can calculate the area.