* F07ARF Example Program Text * Mark 15 Release. NAG Copyright 1991. * .. Parameters .. INTEGER NIN, NOUT PARAMETER (NIN=5,NOUT=6) INTEGER MMAX, NMAX, LDA PARAMETER (MMAX=8,NMAX=8,LDA=MMAX) * .. Local Scalars .. INTEGER I, IFAIL, INFO, J, M, N * .. Local Arrays .. COMPLEX*16 A(LDA,NMAX) INTEGER IPIV(NMAX) CHARACTER CLABS(1), RLABS(1) * .. External Subroutines .. EXTERNAL ZGETRF, X04DBF * .. Intrinsic Functions .. INTRINSIC MIN * .. Executable Statements .. WRITE (NOUT,*) 'F07ARF Example Program Results' * Skip heading in data file READ (NIN,*) READ (NIN,*) M, N IF (M.LE.MMAX .AND. N.LE.NMAX) THEN * * Read A from data file * READ (NIN,*) ((A(I,J),J=1,N),I=1,M) * * Factorize A * CALL ZGETRF(M,N,A,LDA,IPIV,INFO) * * Print details of factorization * WRITE (NOUT,*) IFAIL = 0 CALL X04DBF('General',' ',M,N,A,LDA,'Bracketed','F7.4', + 'Details of factorization','Integer',RLABS, + 'Integer',CLABS,80,0,IFAIL) * * Print pivot indices * WRITE (NOUT,*) WRITE (NOUT,*) 'IPIV' WRITE (NOUT,99999) (IPIV(I),I=1,MIN(M,N)) * IF (INFO.NE.0) WRITE (NOUT,*) 'The factor U is singular' * END IF STOP * 99999 FORMAT ((1X,I12,3I18)) END