How does memory management work with C++ STL vectors?

How does memory management work with C++ STL vectors?

C++ STL vectors manage memory automatically, resizing as needed. They allocate memory on the heap and handle deallocation.

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 memory.

Can I control the capacity of a vector?

Yes, you can use the reserve() function to preallocate memory and control the vector's capacity.

What about memory leaks with vectors?

Vectors automatically manage memory, but if you store pointers, ensure to delete them to avoid leaks.

Are there performance implications with resizing?

Yes, frequent resizing can be costly. It's better to reserve space in advance if you know the size.