```    Program f08nnfe

!     F08NNF Example Program Text

!     Mark 26.1 Release. NAG Copyright 2017.

!     .. Use Statements ..
Use nag_library, Only: nag_wp, x04daf, zgeev
!     .. Implicit None Statement ..
Implicit None
!     .. Parameters ..
Integer, Parameter               :: nb = 64, nin = 5, nout = 6
!     .. Local Scalars ..
Integer                          :: i, ifail, info, lda, ldvr, lwork, n
!     .. Local Arrays ..
Complex (Kind=nag_wp), Allocatable :: a(:,:), vr(:,:), w(:), work(:)
Complex (Kind=nag_wp)            :: dummy(1,1)
Real (Kind=nag_wp), Allocatable  :: rwork(:)
!     .. Intrinsic Procedures ..
Intrinsic                        :: max, nint, real
!     .. Executable Statements ..
Write (nout,*) 'F08NNF Example Program Results'
Write (nout,*)
!     Skip heading in data file
lda = n
ldvr = n
Allocate (a(lda,n),vr(ldvr,n),w(n),rwork(2*n))

!     Use routine workspace query to get optimal workspace.
lwork = -1
!     The NAG name equivalent of zgeev is f08nnf
Call zgeev('No left vectors','Vectors (right)',n,a,lda,w,dummy,1,vr,     &
ldvr,dummy,lwork,rwork,info)

!     Make sure that there is enough workspace for block size nb.
lwork = max((nb+1)*n,nint(real(dummy(1,1))))
Allocate (work(lwork))

!     Read the matrix A from data file

!     Compute the eigenvalues and right eigenvectors of A

!     The NAG name equivalent of zgeev is f08nnf
Call zgeev('No left vectors','Vectors (right)',n,a,lda,w,dummy,1,vr,     &
ldvr,work,lwork,rwork,info)

If (info==0) Then

!       Print solution

Write (nout,*) 'Eigenvalues'
Write (nout,99999) w(1:n)

Write (nout,*)
Flush (nout)

!       ifail: behaviour on error exit
!              =0 for hard exit, =1 for quiet-soft, =-1 for noisy-soft
ifail = 0
Call x04daf('General',' ',n,n,vr,ldvr,'Eigenvectors',ifail)

Else
Write (nout,*)
Write (nout,99998) 'Failure in ZGEEV.  INFO = ', info
End If

99999 Format ((3X,4(' (',F7.4,',',F7.4,')',:)))
99998 Format (1X,A,I4)
End Program f08nnfe
```