program main

c*********************************************************************72
c
cc test_interp_1d_test() tests test_interp_1d().
c
c  Licensing:
c
c    This code is distributed under the MIT license.
c
c  Modified:
c
c    07 October 2012
c
c  Author:
c
c    John Burkardt
c
      implicit none

      integer nd

      call timestamp ( )
      write ( *, '(a)' ) ' '
      write ( *, '(a)' ) 'test_interp_1d_test():'
      write ( *, '(a)' ) '  FORTRAN77 version'
      write ( *, '(a)' ) '  Test test_interp_1d().'

      call test01 ( )

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

      return;
      end
      subroutine test01 ( )

c*********************************************************************72
c
cc TEST01 simply prints the title of each function.
c
c  Licensing:
c
c    This code is distributed under the MIT license.
c
c  Modified:
c
c    28 August 2012
c
c  Author:
c
c    John Burkardt
c
      implicit none

      integer prob
      integer prob_num
      character * ( 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 )

c*********************************************************************72
c
cc TEST_INTERP_1D_TEST02 evaluates each test function at ND sample points.
c
c  Licensing:
c
c    This code is distributed under the MIT license.
c
c  Modified:
c
c    28 August 2012
c
c  Author:
c
c    John Burkardt
c
c  Parameters:
c
c    Input, integer ND, the number of sample points.
c
      implicit none

      integer nd

      double precision a
      double precision b
      integer prob
      integer prob_num
      character * ( 80 ) title
      double precision x(nd)
      double precision y(nd)

      write ( *, '(a)' ) ' '
      write ( *, '(a)' ) 'TEST_INTERP_1D_TEST02'
      write ( *, '(a)' ) '  Use P00_F to sample each 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 r8vec_linspace ( n, a, b, x )

c*********************************************************************72
c
cc r8vec_linspace() creates a vector of linearly spaced values.
c
c  Discussion:
c
c    An R8VEC is a vector of R8's.
c
c    4 points evenly spaced between 0 and 12 will yield 0, 4, 8, 12.
c
c    In other words, the interval is divided into N-1 even subintervals,
c    and the endpoints of intervals are used as the points.
c
c  Licensing:
c
c    This code is distributed under the MIT license.
c
c  Modified:
c
c    14 March 2011
c
c  Author:
c
c    John Burkardt
c
c  Parameters:
c
c    Input, integer N, the number of entries in the vector.
c
c    Input, double precision A, B, the first and last entries.
c
c    Output, double precision X(N), a vector of linearly spaced data.
c
      implicit none

      integer n

      double precision a
      double precision b
      integer i
      double precision x(n)

      if ( n .eq. 1 ) then

        x(1) = ( a + b ) / 2.0D+00

      else

        do i = 1, n
          x(i) = ( dble ( n - i     ) * a
     &           + dble (     i - 1 ) * b )
     &           / dble ( n     - 1 )
        end do

      end if

      return
      end
      subroutine r8vec2_print ( n, a1, a2, title )

c*********************************************************************72
c
cc r8vec2_print() prints an R8VEC2.
c
c  Discussion:
c
c    An R8VEC2 is a dataset consisting of N pairs of R8s, stored
c    as two separate vectors A1 and A2.
c
c  Licensing:
c
c    This code is distributed under the MIT license.
c
c  Modified:
c
c    06 February 2008
c
c  Author:
c
c    John Burkardt
c
c  Parameters:
c
c    Input, integer N, the number of components of the vector.
c
c    Input, double precision A1(N), A2(N), the vectors to be printed.
c
c    Input, character * ( * ) TITLE, a title.
c
      implicit none

      integer n

      double precision a1(n)
      double precision a2(n)
      integer i
      character * ( * ) title

      write ( *, '(a)' ) ' '
      write ( *, '(a)' ) trim ( title )
      write ( *, '(a)' ) ' '
      do i = 1, n
        write ( *, '(2x,i8,a,1x,g14.6,2x,g14.6)' ) i, ':', a1(i), a2(i)
      end do

      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