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

using namespace std;

# include "atbash.hpp"

int main ( );
void atbash_test01 ( );
void atbash_test02 ( );
void timestamp ( );

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

int main ( )

//****************************************************************************80
//
//  Purpose:
//
//    atbash_test() tests atbash().
//
//  Licensing:
//
//    This code is distributed under the MIT license.
//
//  Modified:
//
//    20 March 2018
//
//  Author:
//
//    John Burkardt
//
{
  timestamp ( );

  cout << "\n";
  cout << "atbash_test():\n";
  cout << "  C++ version\n";
  cout << "  atbash() encrypts or decrypts a plain text using the Atbash\n";
  cout << "  substitution cipher.\n";

  atbash_test01 ( );
  atbash_test02 ( );
//
//  Terminate.
//
  cout << "\n";
  cout << "atbash_test():\n";
  cout << "  Normal end of execution.\n";
  cout << "\n";
  timestamp ( );

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

void atbash_test01 ( )

//****************************************************************************80
//
//  Purpose:
//
//    atbash_test01() tests atbash() with a short phrase.
//
//  Licensing:
//
//    This code is distributed under the MIT license.
//
//  Modified:
//
//    20 March 2018
//
//  Author:
//
//    John Burkardt
//
{
  string crypt;
  string decrypt;
  string plain = "A man, a plan, a canal - Panama!";

  cout << "\n";
  cout << "atbash_test01():\n";
  cout << "  atbash() encrypts and decrypts a short phrase.\n";

  crypt = atbash ( plain );
  decrypt = atbash ( crypt );
  cout << "\n";
  cout << "PLAIN:   '" << plain << "'\n";
  cout << "CRYPT:   '" << crypt << "'\n";
  cout << "DECRYPT: '" << decrypt << "'\n";

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

void atbash_test02 ( )

//****************************************************************************80
//
//  Purpose:
//
//    atbash_test02() tests atbash() with another phrase.
//
//  Licensing:
//
//    This code is distributed under the MIT license.
//
//  Modified:
//
//    20 March 2018
//
//  Author:
//
//    John Burkardt
//
{
  string crypt;
  string decrypt;
  string plain = "There are a thousand hacking at the branches of evil for every one who is striking at its root.";

  cout << "\n";
  cout << "atbash_test02():\n";
  cout << "  atbash() encrypts and decrypts a longer phrase.\n";

  crypt = atbash ( plain );
  decrypt = atbash ( crypt );
  cout << "\n";
  cout << "PLAIN:   '" << plain << "'\n";
  cout << "CRYPT:   '" << crypt << "'\n";
  cout << "DECRYPT: '" << decrypt << "'\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:
//
//    08 July 2009
//
//  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
}