C++: std::vector vs std::array

What are the main differences between std::vector and std::array in C++?

The main differences are that std::vector is dynamic in size and can grow or shrink, while std::array has a fixed size.

When should I use std::vector instead of std::array?

Use std::vector when you need a resizable array, especially when the size is not known at compile time.

Are there any performance differences between them?

Yes, std::array can be more efficient for small, fixed-size collections due to less overhead, while std::vector offers flexibility.

Can you give an example of when to use each?

Use std::array for a fixed number of elements, like days of the week, and std::vector for a list of user inputs that can change.