有关auto_ptr的一些注意事项-优快云博客

本文深入探讨了auto_ptr的使用方法及其在内存管理中的优势，包括如何重新分配所有权、避免多重所有权冲突以及注意事项。同时，强调了在特定场景下使用auto_ptr可以显著简化对象的生命周期管理。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

http://www.codeproject.com/KB/tips/CBP_for_memory_allocation.aspx

Use auto_ptr more often than you currently do when allocating so that deallocation is handled automatically. Remember the following guidelines when dealing with auto_ptrs.

An existing non-const auto_ptr can be reassigned to own a different object by using its reset() function.
The auto_ptr::reset() function deletes the existing owned object before owning the new one.
Only one auto_ptr can own an object. So after one auto_ptr (say, P1) has been assigned to another auto_ptr (say, P2) do not use P1 any longer to call a method on the object as P1 is reset to NULL. Remember that the copy of an auto_ptr is not equivalent to the original.
Do not put auto_ptrs into standard containers. This is because doing this creates a copy of the auto_ptr and as mentioned above, the copy of an auto_ptr is not equivalent to the original.
Dereferencing an auto_ptr is the only allowed operation on a const auto_ptr.
auto_ptr cannot be used to manage arrays.