Arbitrary function with parameter

mlimber · *nix forums Guru Joined: 06 Sep 2005 Posts: 1249

joosteto@gmail.com · *nix forums beginner Joined: 09 Jul 2006 Posts: 20

darknails@gmail.com · *nix forums beginner Joined: 21 Jul 2006 Posts: 1

Hi, I would like to know how to define a arbitrary mathematical
function with one variable and a list of paramter, like, f(x). For
example, in GSL library this is done as

/* Definition of an arbitrary function with parameters */

struct gsl_function_struct
{
double (* function) (double x, void * params);
void * params;
};

typedef struct gsl_function_struct gsl_function ;

#define GSL_FN_EVAL(F,x) (*((F)->function))(x,(F)->params)

and the usage is here:
http://www.gnu.org/software/gsl/manual/html_node/Providing-the-function-to-solve.html#Providing-the-function-to-solve

I wonder how one does it in C++?

Thanks.

Google