*     F02GAF Example Program Text
*     Mark 16 Release. NAG Copyright 1992.
*     .. Parameters ..
      INTEGER          NIN, NOUT
      PARAMETER        (NIN=5,NOUT=6)
      INTEGER          NMAX, LDA, LDZ, LWORK
      PARAMETER        (NMAX=8,LDA=NMAX,LDZ=NMAX,LWORK=64*NMAX)
*     .. Local Scalars ..
      INTEGER          I, IFAIL, J, N
*     .. Local Arrays ..
      COMPLEX *16      A(LDA,NMAX), W(NMAX), WORK(LWORK), Z(LDZ,NMAX)
      DOUBLE PRECISION RWORK(NMAX)
      CHARACTER        CLABS(1), RLABS(1)
*     .. External Subroutines ..
      EXTERNAL         F02GAF, X04DBF
*     .. Executable Statements ..
      WRITE (NOUT,*) 'F02GAF Example Program Results'
*     Skip heading in data file
      READ (NIN,*)
      READ (NIN,*) N
      IF (N.LE.NMAX) THEN
*
*        Read A from data file
*
         READ (NIN,*) ((A(I,J),J=1,N),I=1,N)
*
*        Compute Schur factorization of A
*
         IFAIL = 1
*
         CALL F02GAF('Vectors',N,A,LDA,W,Z,LDZ,RWORK,WORK,LWORK,IFAIL)
*
         IF (IFAIL.EQ.0) THEN
            WRITE (NOUT,*)
            WRITE (NOUT,*) 'Eigenvalues'
            WRITE (NOUT,99999) (W(I),I=1,N)
            WRITE (NOUT,*)
*
            IFAIL = 0
            CALL X04DBF('General',' ',N,N,A,LDA,'Bracketed','F7.4',
     +                  'Schur form','Integer',RLABS,'Integer',CLABS,80,
     +                  0,IFAIL)
*
            WRITE (NOUT,*)
*
            IFAIL = 0
            CALL X04DBF('General',' ',N,N,Z,LDZ,'Bracketed','F7.4',
     +                  'Schur vectors','Integer',RLABS,'Integer',CLABS,
     +                  80,0,IFAIL)
         ELSE
            WRITE (NOUT,99998) IFAIL
         END IF
*
      END IF
*
99999 FORMAT (3X,4(' (',F7.4,',',F7.4,')',:))
99998 FORMAT (1X,/1X,' ** F02GAF returned with IFAIL = ',I5)
      END