C++ Shared Pointer vs Unique Pointer

What is the difference between shared pointers and unique pointers in C++?

Shared pointers allow multiple pointers to own the same resource, while unique pointers ensure only one pointer owns the resource.

When should I use a shared pointer instead of a unique pointer?

Use shared pointers when you need shared ownership of a resource, like in complex data structures. Use unique pointers for exclusive ownership.

Can you give an example of when to use each?

Sure! Use a unique pointer for managing a single object, like a file handle. Use a shared pointer for managing a resource shared across multiple objects, like a cache.

Are there any performance implications of using shared pointers?

Yes, shared pointers have overhead due to reference counting, which can impact performance compared to unique pointers.