How does memory management work with C++ vectors?

How does memory management work with C++ vectors?

In C++, vectors manage memory automatically. They allocate memory dynamically and resize as needed.

What happens when a vector resizes?

When a vector resizes, it allocates a new larger memory block, copies existing elements to it, and frees the old block.

Are there any performance implications of resizing?

Yes, resizing can be costly due to memory allocation and copying. It's better to reserve space in advance if possible.

How can I avoid unnecessary resizing?

You can use the reserve() method to allocate enough memory for your expected number of elements upfront.

What about memory leaks with vectors?

Vectors handle memory management for you, so they generally prevent memory leaks unless you use raw pointers.