Deadline：2018-05-06 22:00pm
1. MOOC online course learning
Course address: http://www.icourse163.org/course/PKU-1002029030
Study the course content of the third week, complete the corresponding quiz of the third week's homework, and then upload the screenshot of the course progress to the blue ink cloud class.
Second, the following homework, complete a blog submission
1) According to the requirements of operation 1 about elevator operation:
构想画出 C语言实现的流程图或文字描述C语言程序实现的步骤。（不需要提交代码）
构想画出C++面向对象实现的类图或文字描述程序结构实现。（不需要提交代码）
对比分析两者的区别。
2) Write an elevator class with several private members (consider and define by yourself); there are constructors and destructors; there are two member functions: display the current floor position; accept instructions to reach a certain floor.
The code implements the above class. And paste the code on the blog (requires more complete comments and standardized variable naming)