*     F07AJF Example Program Text
*     Mark 15 Release. NAG Copyright 1991.
*     .. Parameters ..
      INTEGER          NIN, NOUT
      PARAMETER        (NIN=5,NOUT=6)
      INTEGER          NMAX, LDA, LWORK
      PARAMETER        (NMAX=8,LDA=NMAX,LWORK=64*NMAX)
*     .. Local Scalars ..
      INTEGER          I, IFAIL, INFO, J, N
*     .. Local Arrays ..
      DOUBLE PRECISION A(LDA,NMAX), WORK(LWORK)
      INTEGER          IPIV(NMAX)
*     .. External Subroutines ..
      EXTERNAL         DGETRF, DGETRI, X04CAF
*     .. Executable Statements ..
      WRITE (NOUT,*) 'F07AJF 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)
*
*        Factorize A
*
         CALL DGETRF(N,N,A,LDA,IPIV,INFO)
*
         WRITE (NOUT,*)
         IF (INFO.EQ.0) THEN
*
*           Compute inverse of A
*
            CALL DGETRI(N,A,LDA,IPIV,WORK,LWORK,INFO)
*
*           Print inverse
*
            IFAIL = 0
            CALL X04CAF('General',' ',N,N,A,LDA,'Inverse',IFAIL)
         ELSE
            WRITE (NOUT,*) 'The factor U is singular'
         END IF
      END IF
      STOP
*
      END