program main

c*********************************************************************72
c
cc blas2_z_test() tests blas2_z().
c
c  Licensing:
c
c    This code is distributed under the MIT license.
c
c  Modified:
c
c    18 January 2014
c
c  Author:
c
c    John Burkardt
c
      implicit none

      call timestamp ( )
      write ( *, '(a)' ) ' '
      write ( *, '(a)' ) 'blas2_z_test():'
      write ( *, '(a)' ) '  FORTRAN77 version'
      write ( *, '(a)' ) '  Test blas2_z().'

      call test01 ( )
c
c  Terminate.
c
      write ( *, '(a)' ) ' '
      write ( *, '(a)' ) 'blas2_z_test():'
      write ( *, '(a)' ) '  Normal end of execution.'
      write ( *, '(a)' ) ' '
      call timestamp ( )

      stop
      end
      subroutine test01 ( )

c*********************************************************************72
c
cc TEST01 tests CGEMV.
c
c  Licensing:
c
c    This code is distributed under the MIT license.
c
c  Modified:
c
c    18 January 2014
c
c  Author:
c
c    John Burkardt
c
      implicit none

      integer m
      parameter ( m = 5 )
      integer n
      parameter ( n = 5 )

      double complex a(m,n)
      double complex alpha
      double complex beta
      integer i
      integer incx
      integer incy
      integer j
      integer lda
      character trans
      double complex x(n)
      double precision x1
      double precision x2
      double complex y(m)

      write ( *, '(a)' ) ' '
      write ( *, '(a)' ) 'TEST01'
      write ( *, '(a)' ) '  For a general matrix A,'
      write ( *, '(a)' ) 
     &  '  ZGEMV computes y := alpha * A * x + beta * y'
    
      trans = 'N'
      alpha = ( 10.0D+00, 1.0D+00 ) 
      lda = m
      incx = 1
      beta = 3.0D+00
      incy = 1

      do i = 1, m
        do j = 1, n
          if ( i .eq. j ) then
            a(i,j) = ( 2.0D+00, 0.0D+00 )
          else if ( i .eq. j - 1 .or. i .eq. j + 1 ) then
            a(i,j) = ( -1.0D+00, 0.0D+00 )
          else
            a(i,j) = ( 0.0D+00, 0.0D+00 )
          end if
        end do
      end do

      x1 = 0.0D+00
      x2 = dble ( n )
      do i = 1, n
        x(i) = dcmplx ( x1, x2 )
        x1 = x1 + 1.0D+00
        x2 = x2 - 2.0D+00
      end do

      do i = 1, m
        y(i) = ( 100.0D+00, 1.0d+00 )
      end do

      call zgemv ( trans, m, n, alpha, a, lda, x, incx, beta, y, incy )

      write ( *, '(a)' ) ' '
      write ( *, '(a)' ) '  Result vector Y = '
      write ( *, '(a)' ) ' '

      do i = 1, m
        write ( *, '(2x,2g14.6)' ) y(i)
      end do

      return
      end
      function lsame ( ca, cb )

c*********************************************************************72
c
cc lsame() returns TRUE if CA is the same letter as CB regardless of case.
c
c  Licensing:
c
c    This code is distributed under the MIT license.
c   
c  Modified:
c
c    09 February 2014
c
c  Author:
c
c    Original FORTRAN77 version by Jack Dongarra.
c    This version by John Burkardt.
c
c  Reference:
c
c    Jack Dongarra, Jim Bunch, Cleve Moler, Pete Stewart,
c    LINPACK User's Guide,
c    SIAM, 1979,
c    ISBN13: 978-0-898711-72-1,
c    LC: QA214.L56.
c
c    Charles Lawson, Richard Hanson, David Kincaid, Fred Krogh,
c    Basic Linear Algebra Subprograms for FORTRAN usage,
c    ACM Transactions on Mathematical Software,
c    Volume 5, Number 3, pages 308-323, 1979.
c
c  Parameters:
c
c    Input, character CA, CB, the character to compare.
c
c    Output, logical LSAME, is TRUE if the characters are equal,
c    disregarding case.
c
      implicit none

      character ca
      character cb
      intrinsic ichar
      integer inta
      integer intb
      logical lsame
      integer zcode
c
c  Test if the characters are equal.
c
      lsame = ca .eq. cb

      if ( lsame ) then
        return
      end if
c
c  Now test for equivalence if both characters are alphabetic.
c
      zcode = ichar ( 'Z' )
c
c  Use 'Z' rather than 'A' so that ASCII can be detected on Prime
c  machines, on which ICHAR returns a value with bit 8 set.
c  ICHAR('A') on Prime machines returns 193 which is the same as
c  ICHAR('A') on an EBCDIC machine.
c
      inta = ichar ( ca )
      intb = ichar ( cb )
c
c  ASCII is assumed.
c  ZCODE is the ASCII code of either lower or upper case 'Z'.
c
      if ( zcode .eq. 90 .or. zcode .eq. 122 ) then

        if ( inta .ge. 97 .and. inta .le. 122 ) then
          inta = inta - 32
        end if

        if ( intb .ge. 97 .and. intb .le. 122 ) then
          intb = intb - 32
        end if
c
c  EBCDIC is assumed.
c  ZCODE is the EBCDIC code of either lower or upper case 'Z'.
c
      else if ( zcode .eq. 233 .or. zcode .eq. 169 ) then

        if ( inta .ge. 129 .and. inta .le. 137 .or.
     &       inta .ge. 145 .and. inta .le. 153 .or.
     &       inta .ge. 162 .and. inta .le. 169 ) then
          inta = inta + 64
        end if

        if ( intb .ge. 129 .and. intb .le. 137 .or.
     &       intb .ge. 145 .and. intb .le. 153 .or.
     &       intb .ge. 162 .and. intb .le. 169 ) then
          intb = intb + 64
        end if
c
c  ASCII is assumed, on Prime machines.
c  ZCODE is the ASCII code plus 128 of either lower or upper case 'Z'.
c
      else if ( zcode .eq. 218 .or. zcode .eq. 250 ) then

        if ( inta .ge. 225 .and. inta .le. 250 ) then
          inta = inta - 32
        end if

        if ( intb .ge. 225 .and. intb .le. 250 ) then
          intb = intb - 32
        end if

      end if

      lsame = inta .eq. intb

      return
      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    16 September 2005
c
c  Author:
c
c    John Burkardt
c
c  Parameters:
c
c    None
c
      implicit none

      character ( len = 8 ) date
      character ( len = 10 ) time

      call date_and_time ( date, time )

      write ( *, '(a8,2x,a10)' ) date, time

      return
      end
      subroutine xerbla ( srname, info )

c*********************************************************************72
c
cc xerbla() is an error handler.
c
c  Discussion:
c
c    XERBLA is called if an input parameter has an invalid value.  
c    A message is printed and execution stops.
c
c  Licensing:
c
c    This code is distributed under the MIT license.
c  
c  Modified:
c
c    09 February 2014
c
c  Author:
c
c    Original FORTRAN77 version by Jack Dongarra.
c    This version by John Burkardt.
c
c  Reference:
c
c    Jack Dongarra, Jim Bunch, Cleve Moler, Pete Stewart,
c    LINPACK User's Guide,
c    SIAM, 1979,
c    ISBN13: 978-0-898711-72-1,
c    LC: QA214.L56.
c
c    Charles Lawson, Richard Hanson, David Kincaid, Fred Krogh,
c    Basic Linear Algebra Subprograms for FORTRAN usage,
c    ACM Transactions on Mathematical Software,
c    Volume 5, Number 3, pages 308-323, 1979.
c
c  Parameters:
c
c    Input, character * ( * ) SRNAME, the name of the routine 
c    which called XERBLA.
c
c    Input, integer INFO, the position of the invalid parameter in the 
c    parameter list of the calling routine.
c
      implicit none

      integer info
      character * ( * ) srname

      write ( *, '(a)' ) ' '
      write ( *, '(a)' ) 'XERBLA - Fatal error!'
      write ( *, '(a)' ) '  On entry to routine ' // trim ( srname )
      write ( *, '(a)' ) '  an illegal value was detected for' 
      write ( *, '(a,i6)' ) '  parameter number ', info
      stop 1

      end