How does memory management work in C++ vectors?

How does memory management work in C++ vectors?

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

What happens when a vector exceeds its capacity?

When a vector exceeds its capacity, it allocates a new larger memory block, copies existing elements, and frees the old block.

Can I reserve memory in advance for a vector?

Yes, you can use the reserve() function to allocate memory in advance, which can improve performance.

What is the difference between push_back and emplace_back?

push_back copies an object into the vector, while emplace_back constructs the object in place, which can be more efficient.