C + + Learning and Summary 1

1.shared_ptr

Analytical:

shared_ptr is a count pointer, and when the reference count becomes 0 o'clock, the object that shared_ptr points to will be deleted. For example, as follows:

1 voidTest () {2shared_ptr P1 (New int);//count is 13     {4shared_ptr P2 (p1);//Count is 25             {6shared_ptr P2 (p1);//Count is 37}//Count is 28}//count is 19}//The count is 0 while the Int object is deleted

2. Unique_ptr

Analytical:

Unique_ptr is a smart pointer (smart pointer) defined in <memory>. It holds the exclusive right to the object, that is, two unique_ptr cannot point to an object, and the copy operation can only be performed by a move operation.

Reference documents:

[1] cplusplus:http://www.cplusplus.com/

C + + Learning and Summary 1