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C
C SPDX-License-Identifier: BSD-3-Clause
C
* SB04MD EXAMPLE PROGRAM TEXT
*
* .. Parameters ..
INTEGER NIN, NOUT
PARAMETER ( NIN = 5, NOUT = 6 )
INTEGER NMAX, MMAX
PARAMETER ( NMAX = 20, MMAX = 20 )
INTEGER LDA, LDB, LDC, LDZ
PARAMETER ( LDA = NMAX, LDB = MMAX, LDC = NMAX,
$ LDZ = MMAX )
INTEGER LIWORK
PARAMETER ( LIWORK = 4*NMAX )
INTEGER LDWORK
PARAMETER ( LDWORK = MAX( 1, 2*NMAX*NMAX+8*NMAX, 5*MMAX,
$ NMAX+MMAX ) )
* .. Local Scalars ..
INTEGER I, INFO, J, M, N
* .. Local Arrays ..
DOUBLE PRECISION A(LDA,NMAX), B(LDB,MMAX), C(LDC,MMAX),
$ DWORK(LDWORK), Z(LDZ,MMAX)
INTEGER IWORK(LIWORK)
* .. External Subroutines ..
EXTERNAL SB04MD
* .. Intrinsic Functions ..
INTRINSIC MAX
* .. Executable Statements ..
*
WRITE ( NOUT, FMT = 99999 )
* Skip the heading in the data file and read the data.
READ ( NIN, FMT = '()' )
READ ( NIN, FMT = * ) N, M
IF ( N.LT.0 .OR. N.GT.NMAX ) THEN
WRITE ( NOUT, FMT = 99994 ) N
ELSE
READ ( NIN, FMT = * ) ( ( A(I,J), J = 1,N ), I = 1,N )
IF ( M.LT.0 .OR. M.GT.MMAX ) THEN
WRITE ( NOUT, FMT = 99993 ) M
ELSE
READ ( NIN, FMT = * ) ( ( B(I,J), J = 1,M ), I = 1,M )
READ ( NIN, FMT = * ) ( ( C(I,J), J = 1,M ), I = 1,N )
* Find the solution matrix X.
CALL SB04MD( N, M, A, LDA, B, LDB, C, LDC, Z, LDZ, IWORK,
$ DWORK, LDWORK, INFO )
*
IF ( INFO.NE.0 ) THEN
WRITE ( NOUT, FMT = 99998 ) INFO
ELSE
WRITE ( NOUT, FMT = 99997 )
DO 20 I = 1, N
WRITE ( NOUT, FMT = 99996 ) ( C(I,J), J = 1,M )
20 CONTINUE
WRITE ( NOUT, FMT = 99995 )
DO 40 I = 1, M
WRITE ( NOUT, FMT = 99996 ) ( Z(I,J), J = 1,M )
40 CONTINUE
END IF
END IF
END IF
STOP
*
99999 FORMAT (' SB04MD EXAMPLE PROGRAM RESULTS',/1X)
99998 FORMAT (' INFO on exit from SB04MD = ',I2)
99997 FORMAT (' The solution matrix X is ')
99996 FORMAT (20(1X,F8.4))
99995 FORMAT (/' The orthogonal matrix Z is ')
99994 FORMAT (/' N is out of range.',/' N = ',I5)
99993 FORMAT (/' M is out of range.',/' M = ',I5)
END
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