gsl-1.9/doc/examples/demo_fn.h


1
2
3
4
5
6
7
8
9

struct quadratic_params
  {
    double a, b, c;
  };

double quadratic (double x, void *params);
double quadratic_deriv (double x, void *params);
void quadratic_fdf (double x, void *params, 
                    double *y, double *dy);