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

using namespace std;

# include "vector.hpp"

int main ( );
void timestamp ( );

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

int main ( )

//****************************************************************************80
//
//  Purpose:
//
//    vector_test() tests vector().
//
//  Licensing:
//
//    This code is distributed under the MIT license.
//
//  Modified:
//
//    11 October 2025
//
//  Author:
//
//    John Burkardt
//
{
  int x_in[3] = { 10, 20, 30 };
  int x_out[3];

  timestamp ( );
  cout << "\n";
  cout << "vector_test():\n";
  cout << "  C version\n";
  cout << "  Test vector(), with the interface:\n";
  cout << "  vector ( x_in, x_out )\n";

  cout << "\n";
  cout << "    vector ( NULL, NULL )\n";
  vector ( NULL, NULL );

  cout << "\n";
  cout << "    vector ( NULL, x_out )\n";
  vector ( NULL, x_out );

  cout << "\n";
  cout << "    vector ( x_in, NULL )\n";
  vector ( x_in, NULL );

  x_in[0] = 100;
  x_in[1] = 200;
  x_in[2] = 300;

  cout << "\n";
  cout << "    vector ( x_in, x_out )\n";
  vector ( x_in, x_out );
//
//  Terminate.
//
  cout << "\n";
  cout << "vector_test():\n";
  cout << "  Normal end of execution.\n";
  cout << "\n";
  timestamp ( );

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