program main

c*********************************************************************72
c
cc ex07b() demonstrates 3D bar graphs.
c
c  Licensing:
c
c    This code is distributed under the MIT license.
c
c  Modified:
c
c    27 February 2014
c
c  Author:
c
c    This version by John Burkardt
c
c  Reference:
c
c    Helmut Michels,
c    The Data Plotting Software DISLIN - version 10.4,
c    Shaker Media GmbH, January 2010,
c    ISBN13: 978-3-86858-517-9.
c
      implicit none

      integer n
      parameter ( n = 18 )

      character*80 cbuf
      integer i
      integer icray(n)
      real xray(n)
      real xwray(n)
      real yray(n)
      real ywray(n)
      real z1ray(n)
      real z2ray(n)

      save icray
      save xray
      save yray
      save z1ray
      save z2ray

      data icray / 30, 30, 30, 30, 30, 30, 100, 100, 100, 100,
     &  100, 100, 170, 170, 170, 170, 170, 170 /
      data xray / 1.0, 3.0, 8.0, 1.5, 9.0, 6.3, 5.8, 2.3, 8.1, 3.5,
     &  2.2, 8.7, 9.2, 4.8, 3.4, 6.9, 7.5, 3.8 /
      data yray / 5.0, 8.0, 3.5, 2.0, 7.0, 1.0, 4.3, 7.2, 6.0, 8.5,
     &  4.1, 5.0, 7.3, 2.8, 1.6, 8.9, 9.5, 3.2 /
      data z1ray / 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
     &  0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 /
      data z2ray / 4.0, 5.0, 3.0, 2.0, 3.5, 4.5, 2.0, 1.6, 3.8, 4.7,
     &  2.1, 3.5, 1.9, 4.2, 4.9, 2.8, 3.6, 4.3 / 

      call timestamp ( )
      write ( *, '(a)' ) ' '
      write ( *, '(a)' ) 'ex07b():'
      write ( *, '(a)' ) '  FORTRAN77 version'
      write ( *, '(a)' ) '  Demonstrate the creation of 3D bar graphs.'

      do i = 1, n
        xwray(i) = 0.5E+00
        ywray(i) = 0.5E+00
      end do
c
c  Specify the format of the output file.
c
      call metafl ( 'png' )
c
c  Indicate that new data overwrites old data.
c
      call filmod ( 'delete' )
c
c  Specify the name of the output graphics file.
c
      call setfil ( 'ex07b.png' )
c
c  Choose the page size and orientation.
c
      call setpag ( 'usap' )
c
c  For PNG output, reverse the default black background to white.
c
      call scrmod ( 'reverse' )
c
c  Open DISLIN.
c
      call disini ( )
c
c  Plot a border around the page.
c
      call pagera ( )
c
c  Use the HARDWARE font.
c
      call hwfont ( )
      call axspos ( 200, 2600 )
      call axslen ( 1800, 1800 ) 

      call name ( 'X-axis', 'X' )
      call name ( 'Y-axis', 'Y' )
      call name ( 'Z-axis', 'Z' )

      call titlin ( '3D Bars / BARS3D', 3 )

      call labl3d ( 'HORI' )

      call graf3d ( 0.0E+00, 10.0E+00, 0.0E+00, 2.0E+00, 
     &  0.0E+00, 10.0E+00, 0.0E+00, 2.0E+00, 
     &  0.0E+00, 5.0E+00, 0.0E+00, 1.0E+00 )

      call grid3d ( 1, 1, 'BOTTOM' )

      call bars3d ( xray, yray, z1ray, z2ray, xwray, ywray, icray, n ) 

      call legini ( cbuf, 3, 20 )
      call legtit ( ' ' )
      call legpos ( 1300, 1100 )
      call leglin ( cbuf, 'First', 1 )
      call leglin ( cbuf, 'Second', 2 )
      call leglin ( cbuf, 'Third', 3 )
      call legend ( cbuf, 3 )

      call height ( 50 )
      call title ( )
c
c  Close DISLIN.
c
      call disfin ( )
c
c  Terminate.
c
      write ( *, '(a)' ) ' '
      write ( *, '(a)' ) 'ex07b():'
      write ( *, '(a)' ) '  Normal end of execution.'
      write ( *, '(a)' ) ' '
      call timestamp ( )

      stop
      end
      subroutine timestamp ( )

c*********************************************************************72
c
cc TIMESTAMP prints out the current YMDHMS date as a timestamp.
c
c  Licensing:
c
c    This code is distributed under the MIT license.
c
c  Modified:
c
c    12 January 2007
c
c  Author:
c
c    John Burkardt
c
c  Parameters:
c
c    None
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, month(m), y, h, ':', n, ':', s, '.', mm, ampm

      return
      end