Can anyone shed some light on the the following issue? The code below defines an array of structures in a class. I would like this to be a “Static” array and then initialize the array in a initialization method.
I understand that initialization lists are the way to go but due to the size and complexity of the array I plan on using (the example below is a simple snippet that illustrates the problem) I would like to use the initialization method. However, I can’t even get this thing to compile. The error says the reference to the ArrayOfStructs in the initialization routine is undefined. Any understanding of this issue would be greatly appreciated.
l_long_Island
P.S. This is the error message
undefined reference to `ClassWithStaticArray::ArrayOfStruts'

class ClassWithStaticArray {
public:

struct IntegerStruct
{
int Item1;
int Item2;
};
static IntegerStruct ArrayOfStructs [2];


static void InitArray ()
{
ArrayOfStructs [0].Item1 = 0; // Error messages say
ArrayOfStructs [0].Item2 = 0; // ArrayOfStructs is undefined
ArrayOfStructs [1].Item1 = 0;
ArrayOfStructs [1].Item2 = 0;

};

ClassWithStaticArray();
virtual ~ClassWithStaticArray();

};

If anything, the error is here:
Perhaps you mean to declare an array of two IntegerStruct objects?
You are probably missing the following statement before your main() function:

That isn't the error message I would have expected for this problem. But it seems to fit.

That code only declares ArrayOfStruts. It doesn't define it.

Somewhere outside the class definition (and subject to the One Definition Rule) you need:

Edit: I didn't see dwhitney67's reply before posting. His comment about using two elements of a 1 element array is also correct.

Is it a typo or is it supposed to be "ArrayOfStruts" instead of "ArrayOfStructs"?

Responders,
Yes, that should have been a [2] (vs. [1]) and yes that should have been "struct" (vs. "strut"). I put the line you suggested outside the class, in the corresponding .cpp file and ureka it worked !!
I will now try it in the software project that contains the non-trivial data structures. I will let you know how it goes.
Thanks.
l_long_island

Gentlemen (if I may assume that),

I implemented your suggestion in the non-trival code and it is compiling (finally) Thanks much !!