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

using namespace std;

# include "blas0.hpp"

int main ( );
void dmach_test ( );
void test01 ( );
void test015 ( );
void test02 ( );
void test03 ( );
void timestamp ( );

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

int main ( )

//****************************************************************************80
//
//  Purpose:
//
//    blas0_test() tests blas0().
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    25 March 2014
//
//  Author:
//
//    John Burkardt
//
{
  timestamp ( );
  cout << "\n";
  cout << "BLAS0_TEST():\n";
  cout << "  C++ version\n";
  cout << "  Test BLAS0().\n";

  dmach_test ( );
  test015 ( );
  test03 ( );
//
//  Terminate.
//
  cout << "\n";
  cout << "BLAS0_TEST():\n";
  cout << "  Normal end of execution.\n";
  cout << "\n";
  timestamp ( );

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

void dmach_test ( )

//****************************************************************************80
//
//  Purpose:
//
//    DMACH_TEST demonstrates DMACH.
//
//  Licensing:
//
//    This code is distributed under the MIT license.
//
//  Modified:
//
//    15 May 2006
//
//  Author:
//
//    John Burkardt
//
{
  int job;

  cout << "\n";
  cout << "DMACH_TEST\n";
  cout << "  DMACH returns some approximate machine numbers.\n";
  cout << "\n";
  job = 1;
  cout << "  DMACH(1) = EPS =  " << dmach ( job ) << "\n";
  job = 2;
  cout << "  DMACH(2) = TINY = " << dmach ( job ) << "\n";
  job = 3;
  cout << "  DMACH(3) = HUGE = " << dmach ( job ) << "\n";

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

void test015 ( )

//****************************************************************************80
//
//  Purpose:
//
//    TEST015 tests R4_SIGN.
//
//  Licensing:
//
//    This code is distributed under the MIT license.
//
//  Modified:
//
//    25 March 2014
//
//  Author:
//
//    John Burkardt
//
{
# define TEST_NUM 5

  int test;
  float x;
  float x_test[TEST_NUM] = { -1.25, -0.25, 0.0, +0.5, +9.0 };

  cout << "\n";
  cout << "TEST015\n";
  cout << "  R4_SIGN returns the sign of a number.\n";
  cout << "\n";

  for ( test = 0; test < TEST_NUM; test++ )
  {
    x = x_test[test];
    cout << "  " << setw(8) << x
         << "  " << setw(8) << r4_sign ( x ) << "\n";
  }

  return;
# undef TEST_N
}
//****************************************************************************80

void test03 ( )

//****************************************************************************80
//
//  Purpose:
//
//    TEST03 tests R8_SIGN.
//
//  Licensing:
//
//    This code is distributed under the MIT license.
//
//  Modified:
//
//    25 March 2014
//
//  Author:
//
//    John Burkardt
//
{
# define TEST_NUM 5

  int test;
  double x;
  double x_test[TEST_NUM] = { -1.25, -0.25, 0.0, +0.5, +9.0 };

  cout << "\n";
  cout << "TEST03\n";
  cout << "  R8_SIGN returns the sign of a number.\n";
  cout << "\n";

  for ( test = 0; test < TEST_NUM; test++ )
  {
    x = x_test[test];
    cout << "  " << setw(8) << x
         << "  " << setw(8) << r8_sign ( x ) << "\n";
  }

  return;
# undef TEST_NUM
}
//****************************************************************************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
}