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C
C SPDX-License-Identifier: BSD-3-Clause
C
* SB08MD EXAMPLE PROGRAM TEXT
*
* .. Parameters ..
INTEGER NIN, NOUT
PARAMETER ( NIN = 5, NOUT = 6 )
INTEGER DAMAX
PARAMETER ( DAMAX = 10 )
INTEGER LDWORK
PARAMETER ( LDWORK = 5*DAMAX+5 )
* .. Local Scalars ..
DOUBLE PRECISION RES
INTEGER DA, I, INFO
CHARACTER*1 ACONA
* .. Local Arrays ..
DOUBLE PRECISION A(DAMAX+1), DWORK(LDWORK), E(DAMAX+1)
* .. External Functions ..
LOGICAL LSAME
EXTERNAL LSAME
* .. External Subroutines ..
EXTERNAL SB08MD
* .. Executable Statements ..
*
WRITE ( NOUT, FMT = 99999 )
READ ( NIN, FMT = '()' )
* Skip the heading in the data file and read the data.
READ ( NIN, FMT = * ) DA, ACONA
IF ( DA.LE.-1 .OR. DA.GT.DAMAX ) THEN
WRITE ( NOUT, FMT = 99993 ) DA
ELSE
READ ( NIN, FMT = * ) ( A(I), I = 1,DA+1 )
* Compute the spectral factorization of the given polynomial.
CALL SB08MD( ACONA, DA, A, RES, E, DWORK, LDWORK, INFO )
*
IF ( INFO.NE.0 ) THEN
WRITE ( NOUT, FMT = 99998 ) INFO
ELSE
IF ( LSAME( ACONA, 'A' ) ) THEN
WRITE ( NOUT, FMT = 99997 )
DO 20 I = 0, DA
WRITE ( NOUT, FMT = 99995 ) 2*I, A(I+1)
20 CONTINUE
WRITE ( NOUT, FMT = * )
END IF
WRITE ( NOUT, FMT = 99996 )
DO 40 I = 0, DA
WRITE ( NOUT, FMT = 99995 ) I, E(I+1)
40 CONTINUE
WRITE ( NOUT, FMT = 99994 ) RES
END IF
END IF
*
STOP
*
99999 FORMAT (' SB08MD EXAMPLE PROGRAM RESULTS',/1X)
99998 FORMAT (' INFO on exit from SB08MD = ',I2)
99997 FORMAT (' The coefficients of the polynomial B(s) are ',//' powe',
$ 'r of s coefficient ')
99996 FORMAT (' The coefficients of the spectral factor E(s) are ',
$ //' power of s coefficient ')
99995 FORMAT (2X,I5,9X,F9.4)
99994 FORMAT (/' RES = ',1P,E8.1)
99993 FORMAT (/' DA is out of range.',/' DA = ',I5)
END
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