cpp_diary

it's an assignment of OOP.

input standard

1.pdadd:

week4.exe pdadd date(Y M D: like 2018/04/28 or 2018.04.28 whatever it is, just keep it consistent)

2.pdlist(2 ways are supported):

(1) week4.exe pdlist (2) week4.exe pdlist date_begin date_end

3.pdshow:

week4.exe pdshow date

4.pdremove:

week4.exe pdremove date