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* MB04DD EXAMPLE PROGRAM TEXT
* Copyright (c) 2002-2010 NICONET e.V.
*
* .. Parameters ..
INTEGER NIN, NOUT
PARAMETER ( NIN = 5, NOUT = 6 )
INTEGER NMAX
PARAMETER ( NMAX = 100 )
INTEGER LDA, LDQG
PARAMETER ( LDA = NMAX, LDQG = NMAX )
* .. Local Scalars ..
CHARACTER*1 JOB
INTEGER I, ILO, INFO, J, N
* .. Local Arrays ..
DOUBLE PRECISION A(LDA, NMAX), DUMMY(1), QG(LDQG, NMAX+1),
$ SCALE(NMAX)
* .. External Functions ..
DOUBLE PRECISION DLANTR, DLAPY2
EXTERNAL DLANTR, DLAPY2
* .. External Subroutines ..
EXTERNAL MB04DD
* .. Executable Statements ..
WRITE ( NOUT, FMT = 99999 )
* Skip the heading in the data file and read the data.
READ ( NIN, FMT = '()' )
READ ( NIN, FMT = * ) N, JOB
IF( N.LE.0 .OR. N.GT.NMAX ) THEN
WRITE ( NOUT, FMT = 99994 ) N
ELSE
READ ( NIN, FMT = * ) ( ( A(I,J), J = 1,N ), I = 1,N )
READ ( NIN, FMT = * ) ( ( QG(I,J), J = 1,N+1 ), I = 1,N )
CALL MB04DD( JOB, N, A, LDA, QG, LDQG, ILO, SCALE, INFO )
IF ( INFO.NE.0 ) THEN
WRITE ( NOUT, FMT = 99998 ) INFO
ELSE
WRITE ( NOUT, FMT = 99997 )
DO 30 I = 1, N
WRITE (NOUT, FMT = 99995) ( A(I,J), J = 1,N )
30 CONTINUE
WRITE ( NOUT, FMT = 99996 )
DO 40 I = 1, N
WRITE (NOUT, FMT = 99995) ( QG(I,J), J = 1,N+1 )
40 CONTINUE
WRITE (NOUT, FMT = 99993) ILO
IF ( ILO.GT.1 ) THEN
WRITE (NOUT, FMT = 99992) DLAPY2( DLANTR( 'Frobenius',
$ 'Lower', 'No Unit', N-1, ILO-1, A(2,1), LDA,
$ DUMMY ), DLANTR( 'Frobenius', 'Lower', 'No Unit',
$ N, ILO-1, QG(1,1), LDQG, DUMMY ) )
END IF
END IF
END IF
*
99999 FORMAT (' MB04DD EXAMPLE PROGRAM RESULTS',/1X)
99998 FORMAT (' INFO on exit from MB04DD = ',I2)
99997 FORMAT (' The balanced matrix A is ')
99996 FORMAT (/' The balanced matrix QG is ')
99995 FORMAT (20(1X,F12.4))
99994 FORMAT (/' N is out of range.',/' N = ',I5)
99993 FORMAT (/' ILO = ',I4)
99992 FORMAT (/' Norm of subdiagonal blocks: ',G7.2)
END
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