/**
 * NNPDF tutorial: Loading and using a NNPDF grid with the NNPDF Driver.
 *
 * Compile with:
 * g++ -O3 tutorial.cc NNPDFDriver.cc -o prog
 *
 * Author: The NNPDF Collaboration - 2014
 */
 
#include "iostream"
#include "cmath"
#include "NNPDFDriver.h"
using namespace std;
 
int main()
{
  NNPDFDriver *nnpdf = new NNPDFDriver("NNPDF23_nlo_as_0119.LHgrid");
  nnpdf->initPDF(0); // initialize PDF member
 
  // or use the fast option: grid name + replica number
  // NNPDFDriver *nnpdf = new NNPDFDriver("NNPDF23_nlo_as_0119.LHgrid", 0);
 
  double x = 0.1, Q = sqrt(2);
  int f = 0;
  cout << nnpdf->xfx(x,Q,f) << endl; // prints the gluon x*PDF
 
  delete *nnpdf;                 
   
  return 0;
}