Whats the difference? Pointer to an array vs regular array

Question

I\'m familiar with Java and trying to teach myself C/C++. I\'m stealing some curriculum from a class that is hosting their materials here. I unfortunately can\'t ask the tea

Answer 1

On the one hand:

int ar[10];

is using memory allocated on the stack. You can think of it also locally available and while it is possible to pass a pointer / reference to otehr functions, the memory will be freed as soon as it goes out of scope (in your example at the end of the main method but that's usually not the case).

On the other hand:

int ar* = new int[10];

allocates the memory for the array on the heap. It is available until your whole program exits or it is deleted using

delete[] ar;

note, that for delete you need the "[]" if and only if the corresponding new has had them, too.