#include "fit.hh"      //  contains prototypes of get_data, do_fit.

const int MAX_POINTS=100;
int num_points;
double x[MAX_POINTS], y[MAX_POINTS], dy[MAX_POINTS];

void main()
{

  get_data (&num_points, x, y, dy);        // passed to fcn as extern
  do_fit ();
  
}