How to correctly deallocate or delete a c++ vector?

Question

I have a weird problem with vector in C++..

I created a vector and inserted 10000 integer values into it and have checked the memory utilization. It is 600 kb. But after

Answer 1

The C++ vector reserves more memory than it needs for its elements to speed up adding new elements and it doesn't free the reserved memory, after the elements have been deleted. You can try swapping the vector with itself, to make the amount of reserved memory match the actual size of all the elements: v.swap(v)