in-class static array initialization HOWTO?

Please, can anybody tell me how to declare/define a static array of
doubles within a class?.

Hello there!.
I would like to create a class with an array as attribute. This array
is the same for all the objects so I'd like to declare it as static,
but the problem is: where and how should I define the elements of the
array, in the constructor?.

I've tried the following code but It doesn't work at all:

class hamiltonian{

private:
matrix** operators; //OK. perfect
int alpha; //Perfect, of course;
static double coeffs[5]={1,1,1,0.5,0.5} // Here comes the crash

public:

/* destructor */
/* constructor */
}

Please, can anybody tell me how to declare/define a static array of
doubles within a class?.

Thanks everybody.

class hamiltonian{

private:
matrix** operators; //OK. perfect
int alpha; //Perfect, of course;
static double coeffs[5]={1,1,1,0.5,0.5} // Here comes the crash
static double const coeffs[5];

public:

/* destructor */
/* constructor */
}