# include <stdlib.h>
# include <stdio.h>
# include <math.h>
# include <time.h>

# include "asa241.h"

int main ( );
void test01 ( );
void test02 ( );
void timestamp ( );

/******************************************************************************/

int main ( )

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

    asa241_test() tests asa241().

  Licensing:

    This code is distributed under the MIT license. 

  Modified:

    19 March 2010

  Author:

    John Burkardt
*/
{
  timestamp ( );
  printf ( "\n" );
  printf ( "asa241_test():\n" );
  printf ( "  C version\n" );
  printf ( "  Test asa241().\n" );

  test01 ( );
  test02 ( );
/*
  Terminate.
*/
  printf ( "\n" );
  printf ( "asa241_test():\n" );
  printf ( "  Normal end of execution.\n" );
  printf ( "\n" );
  timestamp ( );

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

void test01 ( )

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

    test01() tests r4_normal_01_cdf_inverse(), normal_01_cdf_values().

  Licensing:

    This code is distributed under the MIT license. 

  Modified:

    19 March 2010

  Author:

    John Burkardt
*/
{
  double fx;
  float fx2;
  int n_data;
  double x;
  float x2;

  printf ( "\n" );
  printf ( "test01():\n" );
  printf ( "  Let FX = NormalCDF ( X ).\n" );
  printf ( "\n" );
  printf ( "  normal_01_cdf_values() returns some values of ( X, FX ).\n" );
  printf ( "\n" );
  printf ( "  r4_normal_01_cdf_inverse() takes the value of FX, and computes an\n" );
  printf ( "    estimate X2, of the corresponding input argument,\n" );
  printf ( "    accurate to about 7 decimal places.\n" );
  printf ( "\n" );
  printf ( "          FX                        X                        X2          DIFF\n" );
  printf ( "\n" );

  n_data = 0;

  for ( ; ; )
  {
    normal_01_cdf_values ( &n_data, &x, &fx );

    if ( n_data == 0 )
    {
      break;
    }

    fx2 = ( float ) ( fx );
    x2 = r4_normal_01_cdf_inverse ( fx2 );

    printf ( "  %24.16f  %24.16f  %24.16f  %10.6g\n", fx, x, x2, fabs ( x - x2 ) );
  }

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

void test02 ( )

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

    test02() tests r8_normal_01_cdf_inverse(), normal_01_cdf_values().

  Licensing:

    This code is distributed under the MIT license. 

  Modified:

    19 March 2010

  Author:

    John Burkardt
*/
{
  double fx;
  int n_data;
  double x;
  double x2;

  printf ( "\n" );
  printf ( "test02():\n" );
  printf ( "  Let FX = NormalCDF ( X ).\n" );
  printf ( "\n" );
  printf ( "  normal_01_cdf_values() returns some values of ( X, FX ).\n" );
  printf ( "\n" );
  printf ( "  r8_normal_01_cdf_inverse() takes the value of FX, and computes an\n" );
  printf ( "    estimate X2, of the corresponding input argument,\n" );
  printf ( "    accurate to about 16 decimal places.\n" );
  printf ( "\n" );
  printf ( "          FX                        X                        X2          DIFF\n" );
  printf ( "\n" );

  n_data = 0;

  for ( ; ; )
  {
    normal_01_cdf_values ( &n_data, &x, &fx );

    if ( n_data == 0 )
    {
      break;
    }

    x2 = r8_normal_01_cdf_inverse ( fx );

    printf ( "  %24.16f  %24.16f  %24.16f  %10.6g\n", fx, x, x2, fabs ( x - x2 ) );
  }

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

void timestamp ( )

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

    timestamp() prints the current YMDHMS date as a time stamp.

  Example:

    17 June 2014 09:45:54 AM

  Licensing:

    This code is distributed under the MIT license. 

  Modified:

    17 June 2014

  Author:

    John Burkardt
*/
{
# define TIME_SIZE 40

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

  now = time ( NULL );
  tm = localtime ( &now );

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

  printf ( "%s\n", time_buffer );

  return;
# undef TIME_SIZE
}