A fast, easy to use, free, and community supported 2D game engine
absameen
Member
I've got a method called fetchTilesForLevel that is supposed to return an array of integers.
- (int[]) fetchTilesForLevel:(int)level {
int tiles[35];
switch (level) {
case 0:
return (int[]){0,1,1,1,1,0,1,1,1,1,0,1,1,1,1,0,1,1,1,1,0,1,1,1,1,0,1,1,1,1,0,1,1,1,1};
break;
default:
return tiles;
break;
}
}
What is the correct format to return an array of integers?
Use an NSArray or NSMutableArray instead. Another option is to have your function fill out an array of int[] instead of returning one (c style), but I personally prefer returning to modifying a passed in reference.
You can also try to return int*.
Codemattic
Moderator
Consider using ObjectiveC/Cocoa NSArray or NSMutableArray instead as slipster216 says. But if you want to use straight C, you cannot declare int tiles[35]; as a local variable in your method bc once that method returns that memory is reclaimed.
http://en.wikipedia.org/wiki/Local_variable
http://en.wikipedia.org/wiki/Call_stack
If you want to use straight C arrays you can do one of two things. Use a global c array or an array that is a property of your object. Or dynamically allocate memory for your array in the method and return a pointer to the array:
int *ptr = malloc(35 * sizeof (int));
But now its your responsibility to free it at some point!
free(ptr);
ptr = NULL;
http://en.wikipedia.org/wiki/Malloc
hth, Codemattic
Like Codemattic says, it's best to use NSArray or one of its variants. If you want to do a c-style array, try passing it as an int* parameter (with another parameter for array capacity)... modifing it in the function will also modify the original array you called it with.
if it's all zeros and ones you could create a 64 bit data type and bit
pack all the values..
Chris.
On Mon, Jun 22, 2009 at 4:07 PM, <cocos2d-iphone-discuss@gamesforfood.cl> wrote:
> sergen1976 says:
>
> absameen,
>
> One more complication if you choose to go with NSArray or with
> NSMutableArray: you have to operate with the NSNumber objects instead of
> pure int variables when filling out NSArray object.
>
> Read the whole thread.
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