Thread: allocate no space for dynamic array~

hi all~

we can build dynamic array just like this:

Code:

int num = 10;
int* arr = new int[num];

and i wonder what if num = 0 ? does arr really holds memory allocated or not ?

Try it for yourself to see what happens.

>and i wonder what if num = 0 ?
You get a pointer to an array of size 0. The pointer is valid, but you can't dereference it.

>does arr really holds memory allocated or not ?
No, it "points to" memory allocated.