"function call missing argument list; use '&function' to create a pointer to member"

[Shadowrun]

My question is:

If I have this array:

double *x;
x= new double [5];

...if I want to copy this array to "xx" can I do xx=x; ?

If not, how has to be done?

If that's right.... I got an error when compiling...

 'CMultilatera::f': function call missing argument list; use '&CMultilatera::f' to create a pointer to member

Multilatera is a class with an "f" function...

double CMultilatera::f (double *z);

general code:

double ynewlo;
double *start;
...
...
ynewlo = f ( start ); 

nelmin ( f, n, start, xmin, &ynewlo, reqmin, step,    >>> line with error
		konvge, kcount, &icount, &numres, &ifault );

I know there should be 1 argument when calling "f", but code worked correctly when I used it in a Win32 console without any classes at all. Problem came when I converted it to add classes.

PD: "nelmin" function is something from an external API so I dont' know what arguments to pass.. (I copied that problematic line as I was told in documentation)