YAML file reading scheme based on C++

• This project gives an example, which can be modified by users.
• Need to pre install dependency yaml-cpp, which address is:
  https://github.com/jbeder/yaml-cpp
• Reference:
  C++开发中利用yaml-cpp读写yaml配置文件
  C++ 解析yaml文件的使用方法
• Frank is ... emmmmmmmm ... excellent ...