/* F07CA_P0W_F C++ Header Example Program.
 *
 * Copyright 2019 Numerical Algorithms Group.
 * Mark 27, 2019.
 */

#include <nag.h>
#include <nagad.h>
#include <stdio.h>
#include <iostream>
#include <string>
using namespace std;

int main(void)
{
  int       exit_status = 0;
  void      *ad_handle = 0;
  Integer   nrhs = 1, ifail = 0;

  cout << "F07CA_P0W_F C++ Header Example Program Results\n\n";
  // Skip heading in data file
  string mystr;
  getline (cin, mystr);

  // Read number of x values
  Integer n;
  cin >> n;

  // Allocate arrays containing A and its factorized form, B
  // and the solution X.
  double *dl=0, *d=0, *du=0, *x=0;
  Integer n1 = n-1;
  dl  = new double [n1];
  d   = new double [n];
  du  = new double [n1];
  x   = new double [n];
  
  // Read the tridiagonal matrix A and right hand side B, register and copy
  double dd;
  for (int i = 0; i<n1; i++) {
    cin >> du[i];
  }
  for (int i = 0; i<n; i++) {
    cin >> d[i];
  }
  for (int i = 0; i<n1; i++) {
    cin >> dl[i];
  }
  for (int i = 0; i<n; i++) {
    cin >> x[i];
  }

  // Solve the equations Ax = b for x
  ifail = 0;
  f07ca_p0w_f_(ad_handle,n,nrhs,dl,d,du,x,n,ifail);

  // Print primal solution
  cout << "  Solution:\n";
  cout.precision(4);
  cout.width(12); cout << " ";
  for (int i=0; i<n; i++) {
    cout.width(10); cout << x[i];
  }

  delete [] dl;
  delete [] d;
  delete [] du;
  delete [] x;
  return exit_status;
}