Cheat Engine

gogodr · Posted: Wed Jun 06, 2012 8:42 pm Post subject: any C programmer here?

I need some help D:

Slugsnack · Posted: Wed Jun 06, 2012 8:51 pm Post subject:

me pick me

gogodr · Posted: Wed Jun 06, 2012 9:02 pm Post subject:

so, I'm doing this

Slugsnack · Posted: Wed Jun 06, 2012 9:09 pm Post subject:

yes you can do this. it's more common/idiomatic in C to use an array of size 1 actually:
http://blogs.msdn.com/b/oldnewthing/archive/2004/08/26/220873.aspx

size 0 arrays are also common:
http://stackoverflow.com/questions/295027/array-of-zero-length

however, note that 0 length array is not part of the standard (at least not c89 or c99). they are however a gnu extension. so for example, compile with -std=gnu99. if you are using c99 and your struct is going to be scoped to a function or less, you can avoid the malloc all together by using VLAs. for example:

gogodr · Posted: Wed Jun 06, 2012 9:20 pm Post subject:

I'm not really sure of what C I'm using, it is the one used by Blackberry native sdk

I tried
Vector3 position[0];

and it built with no errors,

thanks :3

Slugsnack · Posted: Wed Jun 06, 2012 9:32 pm Post subject:

just because it compiles without errors does not mean that it guarantees it will work. for example, gcc is not strictly conformant with the c99 standard. hence if you try to compile a source with a 0 size array it will give a warning instead of an error. you would only spot the warning if you compiled with -pedantic.

the problem in this case is that if you are not sure whether your compiler is standard conformant, you could well be relying on undefined behaviour. and by definition that is... undefined. it could do anything. restart your phone. display random porno pictures when your mother picks up the phone, etc.

at the very least check that your compiler is supporting 0 size array through some extension (this is what gnu does)

gogodr · Posted: Wed Jun 06, 2012 9:41 pm Post subject:

Shrooms -> on a contest on blackberry playbook apps
I'm making 3D games

slugnack-> using pointers ten would be a better option ?
like what is the difference between using an array 0 or a pointer?
I believe difference between using an array 0 and an array 1 is just a little of optimization not storing a data space but with a pointer I'm not sure.

I still don't really understand pointers fully.

Channel GannoK · pffrt Reputation: 130 Joined: 12 Apr 2008 Posts: 608

Slugsnack being a bro

+1

Slugsnack · Posted: Wed Jun 06, 2012 9:45 pm Post subject:

i just told you. the difference is that one is well-defined by the standard and the other is undefined behaviour (or at least is less portable if used via an extension). either you don't care about portability. in which case check for an extension or use array of size 1. otherwise just use a pointer...

there are minor optimisations but they shouldn't really concern you at this stage

Barnold Swolezzenegger · Cheater Reputation: 20 Joined: 12 Mar 2011 Posts: 45

gogodr · Posted: Wed Jun 06, 2012 9:51 pm Post subject:

ok ok

thanks :3

Channel GannoK · pffrt Reputation: 130 Joined: 12 Apr 2008 Posts: 608

Barnold Swolezzenegger · Cheater Reputation: 20 Joined: 12 Mar 2011 Posts: 45

I was generalizing the forum.

Aniblaze · Posted: Thu Jun 07, 2012 7:25 am Post subject:

Butters · Posted: Thu Jun 07, 2012 8:15 am Post subject: