C++

6.4    The Simple Sequence Containers

• std::arrayYou specify the number of elements this container should hold at creation. It neither grows nor shrinks; you access its elements with an index or iterate over ranges.

• std::vectorThis all-rounder stores its elements consecutively. You access its elements via a numeric index or iterate over ranges. In addition, it grows automatically when you add elements.

I strive not to use the ambiguous term arrays, but always write either array for std::array or C-array for typ[]. In other sources, the latter is usually simply called array—or, in some texts, field.[ 13 ]

6.4.1    “array”

You use the array when you know in advance how many elements you need. As you can see in the first line of main(), you ...