How do I choose between smart pointers in C++?

What are the different types of smart pointers in C++?

In C++, the main types of smart pointers are std::unique_ptr, std::shared_ptr, and std::weak_ptr. Each serves a different purpose.

When should I use std::unique_ptr?

You should use std::unique_ptr when you want sole ownership of a resource. It automatically deletes the resource when it goes out of scope.

What about std::shared_ptr?

std::shared_ptr is used when you want multiple pointers to share ownership of a resource. It keeps a reference count to manage the resource's lifetime.

Are there any downsides to using std::shared_ptr?

Yes, std::shared_ptr has some overhead due to reference counting and can lead to circular references if not managed properly.