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we can build dynamic array just like this:
and i wonder what if num = 0 ? does arr really holds memory allocated or not ?Code:int num = 10; int* arr = new int[num];
This is a discussion on allocate no space for dynamic array~ within the C++ Programming forums, part of the General Programming Boards category; hi all~ we can build dynamic array just like this: Code: int num = 10; int* arr = new int[num]; ...
hi all~
we can build dynamic array just like this:
and i wonder what if num = 0 ? does arr really holds memory allocated or not ?Code:int num = 10; int* arr = new int[num];
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Try it for yourself to see what happens.
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"The computer programmer is a creator of universes for which he alone is responsible. Universes of virtually unlimited complexity can be created in the form of computer programs." -- Joseph Weizenbaum.
"If you cannot grok the overall structure of a program while taking a shower, you are not ready to code it." -- Richard Pattis.
>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.
My best code is written with the delete key.
