What are smart pointers in C++? Discuss their purpose and how they can help manage dynamic memory allocation.

Smart pointers in C++ are objects that provide automatic memory management for dynamically allocated objects. They are designed to enhance memory safety, simplify memory management, and prevent common memory-related bugs such as memory leaks and dangling pointers. Smart pointers achieve this by automatically deallocating the memory they manage when it is no longer needed, thus eliminating the need for manual memory management using `new` and `delete`. C++ provides three types of smart pointers in its Standard Library: `unique_ptr`, `shared_ptr`, and `weak_ptr`. Each type offers different ownership semantics and memory management capabilities, catering to different scenarios. 1. Unique Pointers (`unique_ptr`): * `unique_ptr` represents exclusive ownership of a dynamically allocated object. It ensures that only one `unique_ptr` instance can own the object at any given time. * When a `unique_ptr` goes out of scope or is reset, it automatically deletes the associated object, thereby preventing memory leaks. ....