一、浅拷贝
Shallow copy: if the field is a pointer to some object, the address of the pointer is copied rather than its contents. (浅拷贝：数据域是一个指针，只拷指针的地址，而非指针指向的内容)
二、深拷贝
Deep copy: Copy the contents that pointed by the pointer (深拷贝：拷贝指针指向的内容)
标签：cpp,拷贝,copy,pointer,contents,指针 From： https://www.cnblogs.com/spacerunnerZ/p/16973677.html