program main !*****************************************************************************80 ! !! asa121_test() tests asa121(). ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 28 August 2021 ! ! Author: ! ! John Burkardt ! implicit none call timestamp ( ) write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'asa121_test():' write ( *, '(a)' ) ' FORTRAN90 version' write ( *, '(a)' ) ' Test asa121().' call test01 ( ) ! ! Terminate. ! write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'asa121_test():' write ( *, '(a)' ) ' Normal end of execution.' write ( *, '(a)' ) ' ' call timestamp ( ) stop 0 end subroutine test01 ( ) !*****************************************************************************80 ! !! test01() tests trigamma(). ! ! Licensing: ! ! This code is distributed under the MIT license. ! ! Modified: ! ! 28 August 2021 ! ! Author: ! ! John Burkardt ! implicit none integer, parameter :: rk = kind ( 1.0D+00 ) real ( kind = rk ) fx real ( kind = rk ) fx2 integer ifault integer n_data real ( kind = rk ) trigamma real ( kind = rk ) x write ( *, '(a)' ) ' ' write ( *, '(a)' ) 'test01():' write ( *, '(a)' ) ' Compare tabulated values of the trigamma' write ( *, '(a)' ) ' function against values computed' write ( *, '(a)' ) ' computed by trigamma().' write ( *, '(a)' ) ' ' write ( *, '(a)' ) & ' X FX FX DIFF' write ( *, '(a)' ) & ' (Tabulated) (TRIGAMMA)' write ( *, '(a)' ) ' ' n_data = 0 do call trigamma_values ( n_data, x, fx ) if ( n_data == 0 ) then exit end if fx2 = trigamma ( x, ifault ) write ( *, '(2x,f10.4,2x,g24.16,2x,g24.16,2x,g10.4)' ) & x, fx, fx2, abs ( fx - fx2 ) 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: ! ! 28 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 ( *, '(i2,1x,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