Should I use vectors instead of arrays?

Question

If I have a fixed number of elements of class MyClass, should I use arrays or vectors?, ie:

MyClass* myArray[];

or

std::vector<MyClass*> myVector;

?

Answer 1

Use std::array or raw arrays for a small, static number of elements.

If you have a lot of elements (more than say 100kb), you hog the stack and are asking for stack corruption / overflow. In that case, or if the number of elements can only be known at runtime, use std::vector.

Answer 2

if you know the number in compile time - use static array.

if the number is dynamic (obtained from the user) - vector is much better to save you the hurdle of managing the memory