# include <cstdlib>
# include <ctime>
# include <iomanip>
# include <iostream>

using namespace std;

# include "besselzero.hpp"

int main ( );
void besselzero_j_print ( );
void besselzero_y_print ( );
void timestamp ( );

//****************************************************************************80

int main ( )

//****************************************************************************80
//
//  Purpose:
//
//    besselzero_test() tests besselzero().
//
//  Licensing:
//
//    This code is distributed under the MIT license.
//
//  Modified:
//
//    08 June 2025
//
//  Author:
//
//    John Burkardt
//
{
  timestamp ( );

  cout << "\n";
  cout << "besselzero_test():\n";
  cout << "  C version\n";
  cout << "  Test besselzero()\n";

  besselzero_j_print ( );
  besselzero_y_print ( );
//
//  Terminate.
//
  cout << "\n";
  cout << "besselzero_test():\n";
  cout << "  Normal end of execution.\n";
  timestamp ( );

  return 0;
}
//****************************************************************************80

void besselzero_j_print ( )

//****************************************************************************80
//
//  Purpose:
//
//    besselzero_j_print() tests jn_zeros() for the Bessel J function.
//
//  Licensing:
//
//    This code is distributed under the MIT license.
//
//  Modified:
//
//    08 June 2025
//
//  Author:
//
//    John Burkardt
//
{
  int i;
  int n;
  int nt;
  double *z0;
  double *z1;

  cout << "\n";
  cout << "besselzero_j_print():\n";
  cout << "  Print zeros of Bessel j function.\n";

  nt = 10;
  z0 = new double[nt];
  z1 = new double[nt];

  n = 0;
  jn_zeros ( n, nt, z0 );

  n = 1;
  jn_zeros ( n, nt, z1 );

  cout << "\n";
  cout << "    i    J0(root i)  J1(root i)\n";
  cout << "\n";
  for ( i = 0; i < nt; i++ )
  {
    cout << "  " << setw(2) << i
         << "  " << setw(14) << z0[i]
         << "  " << setw(14) << z1[i] << "\n";
  }

  delete [] z0;
  delete [] z1;

  return;
}
/******************************************************************************/

void besselzero_y_print ( )

/******************************************************************************/
/*
  Purpose:

    besselzero_y_print() tests besselzero() for the Bessel Y function.

  Licensing:

    This code is distributed under the MIT license.

  Modified:

    08 June 2025

  Author:

    John Burkardt
*/
{
  int i;
  int n;
  int nt;
  double *z0;
  double *z1;

  cout << "\n";
  cout << "besselzero_y_print():\n";
  cout << "  Print zeros of Bessel y function.\n";

  nt = 10;
  z0 = new double[nt];
  z1 = new double[nt];

  n = 0;
  yn_zeros ( n, nt, z0 );

  n = 1;
  yn_zeros ( n, nt, z1 );

  cout << "\n";
  cout << "    i    Y0(root i)  Y1(root i)\n";
  cout << "\n";
  for ( i = 0; i < nt; i++ )
  {
    cout << "  " << setw(2) << i
         << "  " << setw(14) << z0[i]
         << "  " << setw(14) << z1[i] << "\n";
  }

  delete [] z0;
  delete [] z1;

  return;
}
//****************************************************************************80

void timestamp ( )

//****************************************************************************80
//
//  Purpose:
//
//    timestamp() prints the current YMDHMS date as a time stamp.
//
//  Example:
//
//    31 May 2001 09:45:54 AM
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    19 March 2018
//
//  Author:
//
//    John Burkardt
//
{
# define TIME_SIZE 40

  static char time_buffer[TIME_SIZE];
  const struct std::tm *tm_ptr;
  std::time_t now;

  now = std::time ( NULL );
  tm_ptr = std::localtime ( &now );

  std::strftime ( time_buffer, TIME_SIZE, "%d %B %Y %I:%M:%S %p", tm_ptr );

  std::cout << time_buffer << "\n";

  return;
# undef TIME_SIZE
}