Returning a 2D C array from an Objective-C function

Question

I want to do achieve something like this in Objective-C

+(int[10][10])returnArray
{
    int array[10][10];
    return array;
}

However, thi

Answer 1

You can't return an array (of any dimension) in C or in Objective-C. Since arrays aren't lvalues, you wouldn't be able to assign the return value to a variable, so there's no meaningful for such a thing to happen. You can work around it, however. You'll need to return a pointer, or pull a trick like putting your array in a structure:

// return a pointer
+(int (*)[10][10])returnArray
{
    int (*array)[10][10] = malloc(10 * 10 * sizeof(int));
    return array;
}

// return a structure
struct array {
  int array[10][10];
};

+(struct array)returnArray
{
   struct array array;
   return array;
}