program main

!*****************************************************************************80
!
!! test_interp_1d_test() tests test_interp_1d().
!
!  Licensing:
!
!    This code is distributed under the MIT license.
!
!  Modified:
!
!    01 September 2021
!
!  Author:
!
!    John Burkardt
!
  implicit none

  integer nd

  call timestamp ( )
  write ( *, '(a)' ) ' '
  write ( *, '(a)' ) 'test_interp_1d_test():'
  write ( *, '(a)' ) '  FORTRAN90 version'
  write ( *, '(a)' ) '  Test test_interp_1d().'
  write ( *, '(a)' ) '  The R8LIB library is needed.'

  call test01 ( )

  nd = 11
  call test02 ( nd )
!
!  Terminate.
!
  write ( *, '(a)' ) ' '
  write ( *, '(a)' ) 'test_interp_1d_test():'
  write ( *, '(a)' ) '  Normal end of execution.'
  write ( *, '(a)' ) ' '
  call timestamp ( )

  stop 0
end
subroutine test01 ( )

!*****************************************************************************80
!
!! test01() simply prints the title of each function.
!
!  Licensing:
!
!    This code is distributed under the MIT license.
!
!  Modified:
!
!    21 August 2012
!
!  Author:
!
!    John Burkardt
!
  implicit none

  integer prob
  integer prob_num
  character ( len = 80 ) title

  write ( *, '(a)' ) ' '
  write ( *, '(a)' ) 'test01():'
  write ( *, '(a)' ) '  Print the title of each function.'

  call p00_prob_num ( prob_num )
  
  write ( *, '(a)' ) ' '
  write ( *, '(a,i2,a)' ) '  There are ', prob_num, ' functions available:'
  write ( *, '(a)' ) '  Index  Title'
  write ( *, '(a)' ) ' '

  do prob = 1, prob_num

    call p00_title ( prob, title )

    write ( *, '(2x,i2,2x,a)' ) prob, trim ( title )

  end do

  return
end
subroutine test02 ( nd )

!*****************************************************************************80
!
!! test02() evaluates each test function at ND sample points.
!
!  Licensing:
!
!    This code is distributed under the MIT license.
!
!  Modified:
!
!    21 August 2012
!
!  Author:
!
!    John Burkardt
!
!  Input:
!
!    integer ND, the number of sample points.
!
  implicit none

  integer, parameter :: rk = kind ( 1.0D+00 )

  integer nd

  real ( kind = rk ) a
  real ( kind = rk ) b
  integer prob
  integer prob_num
  character ( len = 80 ) title
  real ( kind = rk ) x(nd)
  real ( kind = rk ) y(nd)

  write ( *, '(a)' ) ' '
  write ( *, '(a)' ) 'test02():'
  write ( *, '(a)' ) '  p00_f() can sample any test function.'

  call p00_prob_num ( prob_num )

  a = 0.0D+00
  b = 1.0D+00
  call r8vec_linspace ( nd, a, b, x )

  write ( *, '(a)' ) ' '

  do prob = 1, prob_num

    call p00_f ( prob, nd, x, y )
    write ( title, '(a,i2)' ) 'X, Y for problem ', prob
    call r8vec2_print ( nd, x, y, trim ( title ) )

  end do

  return
end
subroutine timestamp ( )

!*****************************************************************************80
!
!! timestamp() prints the current YMDHMS date as a time stamp.
!
!  Example:
!
!    31 May 2001   9:45:54.872 AM
!
!  Licensing:
!
!    This code is distributed under the MIT license.
!
!  Modified:
!
!    15 August 2021
!
!  Author:
!
!    John Burkardt
!
  implicit none

  character ( len = 8 ) ampm
  integer d
  integer h
  integer m
  integer mm
  character ( len = 9 ), parameter, dimension(12) :: month = (/ &
    'January  ', 'February ', 'March    ', 'April    ', &
    'May      ', 'June     ', 'July     ', 'August   ', &
    'September', 'October  ', 'November ', 'December ' /)
  integer n
  integer s
  integer values(8)
  integer y

  call date_and_time ( values = values )

  y = values(1)
  m = values(2)
  d = values(3)
  h = values(5)
  n = values(6)
  s = values(7)
  mm = values(8)

  if ( h < 12 ) then
    ampm = 'AM'
  else if ( h == 12 ) then
    if ( n == 0 .and. s == 0 ) then
      ampm = 'Noon'
    else
      ampm = 'PM'
    end if
  else
    h = h - 12
    if ( h < 12 ) then
      ampm = 'PM'
    else if ( h == 12 ) then
      if ( n == 0 .and. s == 0 ) then
        ampm = 'Midnight'
      else
        ampm = 'AM'
      end if
    end if
  end if

  write ( *, '(i2.2,1x,a,1x,i4,2x,i2,a1,i2.2,a1,i2.2,a1,i3.3,1x,a)' ) &
    d, trim ( month(m) ), y, h, ':', n, ':', s, '.', mm, trim ( ampm )

  return
end