Can't initialize C-array in Objective-C

Question

my YYY.h file is


 #define W 1 // i am
 #define B 2 // opponent
 #define F 3 // board margin
static int boardPos[12][12];
@interface YYY : NSObject 
{...}
-(id)init;
@end

and YYY.m is


#import "YYY.h"


@implementation YYY

-(id)init
{   
    if (self = [super init]) {

        // initializing Empty Board

        boardPos[12][12] = {
            {F,F,F,F,F,F,F,F,F,F,F,F},
            {F,0,0,0,0,0,0,0,0,0,0,F},
            {F,0,0,0,0,0,0,0,0,0,0,F},
            {F,0,0,0,0,0,0,0,0,0,0,F},
            {F,0,0,0,0,0,0,0,0,0,0,F},
            {F,0,0,0,0,0,0,0,0,0,0,F},
            {F,0,0,0,0,0,0,0,0,0,0,F},
            {F,0,0,0,0,0,0,0,0,0,0,F},
            {F,0,0,0,0,0,0,0,0,0,0,F},
            {F,0,0,0,0,0,0,0,0,0,0,F},
            {F,0,0,0,0,0,0,0,0,0,0,F},
            {F,F,F,F,F,F,F,F,F,F,F,F}
        };
...

I got error "Expected expression before { token in "boardPos[12][12] = {" string. If I write something before boardPos - it become local variable; So I cant initialize this C-array properly. I need boardPos be visible in class scope. I tried to put it in class declaration - same error.

Btw, I already rewrite it on NSArray objects but still interesting how to deal with C-arrays.

Thx!

yehnan · Accepted Answer · 2010-01-17 07:04:57Z

5

I think you should write this in .m file

static int boardPos[12][12] = {
        {F,F,F,F,F,F,F,F,F,F,F,F},
        {F,0,0,0,0,0,0,0,0,0,0,F},
        {F,0,0,0,0,0,0,0,0,0,0,F},
        {F,0,0,0,0,0,0,0,0,0,0,F},
        {F,0,0,0,0,0,0,0,0,0,0,F},
        {F,0,0,0,0,0,0,0,0,0,0,F},
        {F,0,0,0,0,0,0,0,0,0,0,F},
        {F,0,0,0,0,0,0,0,0,0,0,F},
        {F,0,0,0,0,0,0,0,0,0,0,F},
        {F,0,0,0,0,0,0,0,0,0,0,F},
        {F,0,0,0,0,0,0,0,0,0,0,F},
        {F,F,F,F,F,F,F,F,F,F,F,F}
    };

and remove static int boardPos[12][12]; in .h, remove boardPos[12][12] = { ... } in .m.

This will make boardPos visiable only in this .m file.

answered Jan 17, 2010 at 7:04

yehnan

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jspcal · Accepted Answer · 2010-01-17 07:08:59Z

3

the array initialization has to be done as part of a declaration, i.e.:

in b[12] = {...};

it's not possible within a dynamic assignment...

answered Jan 17, 2010 at 7:08

jspcal

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