What does this "new" mean?

[player6]

Dose anyone can tell me what this new do? New a ClassA with buff max?
Thanks.

ClassA *pA = NULL;
pA  = new sizeof(max) ClassA;

[ZED0815]

http://www.cplusplus.com/doc/tutorial/dynamic/

[player6]

hi ZED0815
it seems the tutorial not include this case. :(

[ZED0815]

What is your code supposed to do? I never saw new used like this---And what is "max"??

[ZED0815]

Ok I'll give it a shot maybe it'll help you:

int max = 10; // give me 10 class objects please!
ClassA *pA = NULL; // you want a pointer here not a real instantiation - correct thing is to initialize the pointer to NULL (well done)
pA  = new ClassA[max];

[...]do stuff

delete[] pA; // important to get memory cleaned up again 

[player6]

What is your code supposed to do?
It's what I want know.
max seems is a length. Is's a int value.

your code is allocate a array of ClassA, it not same with my case.

[ZED0815]

Well in your code even the first line is just....wrong! You cant tell an actual object to be NULL. A pointer yes, but object no! As I stated before I never saw a new directive like this before...maybe someone else has a clue on this one - I don't

[ZED0815]

maybe this helps you: http://msdn.microsoft.com/en-us/library/y1w9bk0b%28v=vs.80%29.aspx

[player6]

oh, the first line is wrong, I forgot the "*".