```    Program f08jcfe

!     F08JCF Example Program Text

!     Mark 26 Release. NAG Copyright 2016.

!     .. Use Statements ..
Use nag_library, Only: dnrm2, dstevd, nag_wp, x04caf
!     .. Implicit None Statement ..
Implicit None
!     .. Parameters ..
Integer, Parameter               :: nin = 5, nout = 6
!     .. Local Scalars ..
Real (Kind=nag_wp)               :: norm
Integer                          :: i, ifail, info, ldz, liwork, lwork,  &
n
Character (1)                    :: job
!     .. Local Arrays ..
Real (Kind=nag_wp), Allocatable  :: d(:), e(:), work(:), z(:,:)
Integer, Allocatable             :: iwork(:)
!     .. Executable Statements ..
Write (nout,*) 'F08JCF Example Program Results'
!     Skip heading in data file
ldz = n
liwork = 5*n + 3
lwork = n*n + 4*n + 1
Allocate (d(n),e(n-1),work(lwork),z(ldz,n),iwork(liwork))

!     Read T from data file

!     Calculate all the eigenvalues and eigenvectors of T
!     The NAG name equivalent of dstevd is f08jcf
Call dstevd(job,n,d,e,z,ldz,work,lwork,iwork,liwork,info)

Write (nout,*)
If (info>0) Then
Write (nout,*) 'Failure to converge.'
Else

!       Print eigenvalues and eigenvectors

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

!       Normalize the eigenvectors
Do i = 1, n
!         The NAG name equivalent of dnrm2 is f06ejf
norm = dnrm2(n,z(1,i),1)
If (z(1,i)<0.0_nag_wp) Then
norm = -norm
End If
z(1:n,i) = z(1:n,i)/norm
End Do

!       ifail: behaviour on error exit
!              =0 for hard exit, =1 for quiet-soft, =-1 for noisy-soft
ifail = 0
Call x04caf('General',' ',n,n,z,ldz,'Eigenvectors',ifail)

End If

99999 Format (3X,(8F8.4))
End Program f08jcfe
```