[GeekBand ] 利用 pass by reference -to -const 编写高效规范的 c++代码

Effective C ++ 侯捷译 条款20

开发环境采用：VS2013版本

class Person{ public: Person(); virtual ~Person(); private: std::string name; std::stringi address; }; class Student: public Persion{ public: Student(); ~Student(); private: std::string schoolName; std::string schoolAddress; };