program main

c*********************************************************************72
c
cc humps_test() tests humps().
c
c  Licensing:
c
c    This code is distributed under the MIT license.
c
c  Modified:
c
c    06 August 2019
c
c  Author:
c
c    John Burkardt
c
      implicit none

      call timestamp ( )
      write ( *, '(a)' ) ''
      write ( *, '(a)' ) 'humps_test():'
      write ( *, '(a)' ) '  Fortran77 version'
      write ( *, '(a)' ) '  Test humps().'

      call humps_antideriv_test ( )
      call humps_deriv_test ( )
      call humps_deriv2_test ( )
      call humps_fun_test ( )
c
c  Terminate.
c
      write ( *, '(a)' ) ''
      write ( *, '(a)' ) 'humps_test():'
      write ( *, '(a)' ) '  Normal end of execution.'
      write ( *, '(a)' ) ''
      call timestamp ( )

      stop 0
      end
      subroutine humps_antideriv_test ( )

c*********************************************************************72
c
cc humps_antideriv_test tests humps_antideriv.
c
c  Licensing:
c
c    This code is distributed under the MIT license.
c
c  Modified:
c
c    06 August 2019
c
c  Author:
c
c    John Burkardt
c
      implicit none

      double precision a
      double precision b
      double precision humps_antideriv
      integer i
      integer n
      double precision, allocatable :: x(:)
      double precision, allocatable :: y(:)

      write ( *, '(a)' ) ''
      write ( *, '(a)' ) 'humps_antideriv_test():'
      write ( *, '(a)' ) '  Test humps_antideriv().'

      a = -0.5D+00
      b = 2.0D+00
      n = 101
      allocate ( x(1:n) )
      allocate ( y(1:n) )

      do i = 1, n
        x(i) = ( ( n - i ) * a + i * b ) / ( n - 1 )
        y(i) = humps_antideriv ( x(i) )
      end do
      call plot_xy ( n, x, y, 'humps_antideriv' )

      deallocate ( x )
      deallocate ( y )

      return
      end
      subroutine humps_fun_test ( )

c*********************************************************************72
c
cc humps_fun_test tests humps_fun.
c
c  Licensing:
c
c    This code is distributed under the MIT license.
c
c  Modified:
c
c    06 August 2019
c
c  Author:
c
c    John Burkardt
c
      implicit none

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

      double precision a
      double precision b
      double precision humps_fun
      integer i
      integer n
      double precision, allocatable :: x(:)
      double precision, allocatable :: y(:)

      write ( *, '(a)' ) ''
      write ( *, '(a)' ) 'humps_fun_test():'
      write ( *, '(a)' ) '  Test humps_fun().'

      a = -0.5D+00
      b = 2.0D+00
      n = 101
      allocate ( x(1:n) )
      allocate ( y(1:n) )

      do i = 1, n
        x(i) = ( ( n - i ) * a + i * b ) / ( n - 1 )
        y(i) = humps_fun ( x(i) )
      end do
      call plot_xy ( n, x, y, 'humps_fun' )

      deallocate ( x )
      deallocate ( y )

      return
      end
      subroutine humps_deriv_test ( )

c*********************************************************************72
c
cc humps_deriv_test tests humps_deriv.
c
c  Licensing:
c
c    This code is distributed under the MIT license.
c
c  Modified:
c
c    06 August 2019
c
c  Author:
c
c    John Burkardt
c
      implicit none

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

      double precision a
      double precision b
      double precision humps_deriv
      integer i
      integer n
      double precision, allocatable :: x(:)
      double precision, allocatable :: y(:)

      write ( *, '(a)' ) ''
      write ( *, '(a)' ) 'humps_deriv_test():'
      write ( *, '(a)' ) '  Test humps_deriv().'

      a = -0.5D+00
      b = 2.0D+00
      n = 101
      allocate ( x(1:n) )
      allocate ( y(1:n) )

      do i = 1, n
        x(i) = ( ( n - i ) * a + i * b ) / ( n - 1 )
        y(i) = humps_deriv ( x(i) )
      end do
      call plot_xy ( n, x, y, 'humps_deriv' )

      deallocate ( x )
      deallocate ( y )

      return
      end
      subroutine humps_deriv2_test ( )

c*********************************************************************72
c
cc humps_deriv2_test tests humps_deriv2.
c
c  Licensing:
c
c    This code is distributed under the MIT license.
c
c  Modified:
c
c    06 August 2019
c
c  Author:
c
c    John Burkardt
c
      implicit none

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

      double precision a
      double precision b
      double precision humps_deriv2
      integer i
      integer n
      double precision, allocatable :: x(:)
      double precision, allocatable :: y(:)

      write ( *, '(a)' ) ''
      write ( *, '(a)' ) 'humps_deriv2_test():'
      write ( *, '(a)' ) '  Test humps_deriv2().'

      a = -0.5D+00
      b = 2.0D+00
      n = 101
      allocate ( x(1:n) )
      allocate ( y(1:n) )

      do i = 1, n
        x(i) = ( ( n - i ) * a + i * b ) / ( n - 1 )
        y(i) = humps_deriv2 ( x(i) )
      end do
      call plot_xy ( n, x, y, 'humps_deriv2' )

      deallocate ( x )
      deallocate ( y )

      return
      end
      subroutine timestamp ( )

c*********************************************************************72
c
cc timestamp() prints the YMDHMS date as a timestamp.
c
c  Licensing:
c
c    This code is distributed under the MIT license.
c
c  Modified:
c
c    12 June 2014
c
c  Author:
c
c    John Burkardt
c
      implicit none

      character * ( 8 ) ampm
      integer d
      character * ( 8 ) date
      integer h
      integer m
      integer mm
      character * ( 9 ) month(12)
      integer n
      integer s
      character * ( 10 ) time
      integer y

      save month

      data month /
     &  'January  ', 'February ', 'March    ', 'April    ', 
     &  'May      ', 'June     ', 'July     ', 'August   ', 
     &  'September', 'October  ', 'November ', 'December ' /

      call date_and_time ( date, time )

      read ( date, '(i4,i2,i2)' ) y, m, d
      read ( time, '(i2,i2,i2,1x,i3)' ) h, n, s, mm

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