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

using namespace std;

# include "sncndn.hpp"

int main ( );
void jacobi_cn_test ( );
void jacobi_dn_test ( );
void jacobi_sn_test ( );
void timestamp ( );

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

int main ( )

//****************************************************************************80
//
//  Purpose:
//
//    sncndn_test() tests sncndn().
//
//  Licensing:
//
//    This code is distributed under the MIT license.
//
//  Modified:
//
//    26 June 2025
//
//  Author:
//
//    John Burkardt
//
{
  timestamp ( );
  cout << "\n";
  cout << "sncndn_test():\n";
  cout << "  C++ version\n";
  cout << "  Test sncndn(), to evaluate Jacobi elliptic functions.\n";

  jacobi_cn_test ( );
  jacobi_dn_test ( );
  jacobi_sn_test ( );
//
//  Terminate.
//
  cout << "\n";
  cout << "sncndn_test():\n";
  cout << "  Normal end of execution.\n";
  timestamp ( );

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

void jacobi_cn_test ( )

//****************************************************************************80
//
//  Purpose:
//
//    jacobi_cn_test() tests jacobi_cn().
//
//  Licensing:
//
//    This code is distributed under the MIT license.
//
//  Modified:
//
//    26 June 2025
//
//  Author:
//
//    John Burkardt
//
{
  double a;
  double k;
  double cn1;
  double cn2;
  double m;
  int n_data;
  double u;

  cout << "\n";
  cout << "jacobi_cn_test():\n";
  cout << "  jacobi_cn() evaluates the Jacobi elliptic function CN.\n";
  cout << "\n";
  cout << "    U       M       Exact CN                CN(U,M)\n";
  cout << "\n";

  n_data = 0;

  while ( true )
  {
    jacobi_cn_values ( n_data, u, a, k, m, cn1 );

    if ( n_data == 0 )
    {
      break;
    }

    cn2 = jacobi_cn ( u, m );

    cout << setw(8) << u
         << setw(8) << m
         << setw(24) << cn1
         << setw(24) << cn2 << "\n";
  }

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

void jacobi_dn_test ( )

//****************************************************************************80
//
//  Purpose:
//
//    jacobi_dn_test() tests jacobi_dn().
//
//  Licensing:
//
//    This code is distributed under the MIT license.
//
//  Modified:
//
//    26 June 2025
//
//  Author:
//
//    John Burkardt
//
{
  double a;
  double k;
  double dn1;
  double dn2;
  double m;
  int n_data;
  double u;

  cout << "\n";
  cout << "jacobi_dn_test():\n";
  cout << "  jacobi_dn() evaluates the Jacobi elliptic function DN.\n";
  cout << "\n";
  cout << "    U       M       Exact DN                DN(U,M)\n";
  cout << "\n";

  n_data = 0;

  while ( true )
  {
    jacobi_dn_values ( n_data, u, a, k, m, dn1 );

    if ( n_data == 0 )
    {
      break;
    }

    dn2 = jacobi_dn ( u, m );

    cout << setw(8) << u
         << setw(8) << m
         << setw(24) << dn1
         << setw(24) << dn2 << "\n";
  }

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

void jacobi_sn_test ( )

//****************************************************************************80
//
//  Purpose:
//
//    jacobi_sn_test() tests jacobi_sn().
//
//  Licensing:
//
//    This code is distributed under the MIT license.
//
//  Modified:
//
//    26 June 2025
//
//  Author:
//
//    John Burkardt
//
{
  double a;
  double k;
  double m;
  int n_data;
  double sn1;
  double sn2;
  double u;

  cout << "\n";
  cout << "jacobi_sn_test():\n";
  cout << "  jacobi_sn() evaluates the Jacobi elliptic function SN.\n";
  cout << "\n";
  cout << "    U       M       Exact SN                SN(U,M)\n";
  cout << "\n";

  n_data = 0;

  while ( true )
  {
    jacobi_sn_values ( n_data, u, a, k, m, sn1 );

    if ( n_data == 0 )
    {
      break;
    }

    sn2 = jacobi_sn ( u, m );

    cout << setw(8) << u
         << setw(8) << m
         << setw(24) << sn1
         << setw(24) << sn2 << "\n";
  }

  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
}