program main

!*****************************************************************************80
!
!! MAIN is the main program for OWENS_PRB.
!
!  Discussion:
!
!    OWENS_PRB calls the OWENS routines.
!
!  Modified:
!
!    16 January 2008
!
!  Author:
!
!    John Burkardt
!
  implicit none

  call timestamp ( )

  write ( *, '(a)' ) ' '
  write ( *, '(a)' ) 'OWENS_PRB:'
  write ( *, '(a)' ) '  FORTRAN90 version'
  write ( *, '(a)' ) ' '
  write ( *, '(a)' ) '  Test routines in the OWENS library.'

  call test01

  write ( *, '(a)' ) ' '
  write ( *, '(a)' ) 'OWENS_PRB:'
  write ( *, '(a)' ) '  Normal end of execution.'

  write ( *, '(a)' ) ' '
  call timestamp ( )

  stop
end
subroutine test01

!*****************************************************************************80
!
!! TEST01 demonstrates the use of T.
!
!  Modified:
!
!    02 February 2008
!
!  Author:
!
!    John Burkardt
!
  implicit none

  real    ( kind = 8 ) a
  real    ( kind = 8 ) h
  integer ( kind = 4 ) n_data
  real    ( kind = 8 ) t
  real    ( kind = 8 ) t1
  real    ( kind = 8 ) t2

  write ( *, '(a)' ) ' '
  write ( *, '(a)' ) 'TEST01:'
  write ( *, '(a)' ) '  T computes the Owen T function.'
  write ( *, '(a)' ) '  Compare with tabulated values.'
  write ( *, '(a)' ) ' '
  write ( *, '(a,a)' ) '          H               A           ', &
  'T                         T                       DIFF'
  write ( *, '(a,a)' ) '                                     ', &
  '(Tabulated)               (TFN)'
  write ( *, '(a)' ) ' '

  n_data = 0

  do

    call owen_values ( n_data, h, a, t1 )

    if ( n_data == 0 ) then
      exit
    end if

    t2 = t ( h, a )

    write ( *, '(2x,f14.6,2x,f14.6,2x,g24.16,2x,g24.16,2x,g10.4)' ) &
    h, a, t1, t2, abs ( t1 - t2 )

  end do

  return
end