一些基础的C++操作，适用于刚开始学习C++的学生，大部分是老师布置的习题，其中包括数据结构的前4道题目，和一个自己编写的日期类-Some basic C++ operator, for beginning students to learn C++, most of the teachers arranged exercises, including the first four data structures topics, and a date written in their own c