Deep copy and shallow copy

Shallow copy: Copies the pointer, and copies the two pointers to the same memory space. Use "bit copy"

deep Copy: Copies the contents of the pointer, and a deep copy of the pointer is a pointer to two different addresses. use "Value copy"

Simple image of the understanding as: to the warehouse of things to manage, the use of shallow copy of the original warehouse is the key to another configuration (corresponding pointer), the two keys can now open the door of the warehouse, and then to manage the goods, and the deep copy method is to the original warehouse inside the goods to carry out additional backup, deposit into the new warehouse, A new key (corresponding pointer) is configured to manage the warehouse.

Deep copy and shallow copy