Dynamic Memory and smart pointer

The memory automatically allocated by the compiler has a strict lifetime. Global objects are allocated when the program starts and destroyed when the program ends. For a partial automatic object, it is created when we enter the block where its definition is located and destroyed when it leaves the block. The local static object is allocated before the first use and destroyed at the end of the program.

In addition to automatic and static objects, C ++ also supports dynamic object allocation. The lifetime of dynamically allocated objects is irrelevant to where they are created. These objects are destroyed only when they are explicitly released.

 

Dynamic Memory and smart pointer