if [ $# -lt 3 ]
then
  echo " "
  echo "            *****   SSUB      *****      "
  echo " "
  echo "      The program subtract a constant from a field"
  echo " "
  echo "    Syntax: smult <file1> <file2> <integer>"
  echo "  "
  exit 0
else
 echo " "
 echo "            *****   SSUB      *****      "
 echo " "
 echo "file1="$1
 echo "file2="$2
 echo "Constant="$3
 cp $1 fort.1
fi
cat >ssub.f <<EOF
      PROGRAM PSSUB
      IMPLICIT REAL (A-H,O-Z)
      PRINT *,'0**** SSUB (INPUT,OUTPUT,TAPE1,TAPE2)****'
      PRINT *,'   '
      NCHAN=1
      CALL PARLES (NCHAN,NDIM,NSET)
      CALL SSUB (NDIM) 
      STOP 
      END
C******************************************************************
      SUBROUTINE PARLES (NCHAN,NDIM,NSET)
      IMPLICIT REAL (A-H,O-Z)
C
      INTEGER I1,I2,I3

      REWIND NCHAN
      READ(NCHAN,END=10) ITIME,INAME,ILEV,ISIZE
      REWIND NCHAN

      NSET=0
      NDIM=0
    1 READ (NCHAN,END=100) I1,I2,I3,I4
      NDIM=MAX0(NDIM,I4)
      READ (NCHAN,END=101) 
      NSET=NSET+1
      GOTO1
      
  101 PRINT *,' MORE HEADER THEN DATA '     
  100 PRINT 1000,NCHAN,NDIM,NSET
      REWIND NCHAN
      RETURN    
   10 PRINT *,'INPUT FILE ON TAPE',NCHAN,' IS EMPTY'
      STOP 'MISTAKE'
 1000 FORMAT (1X,' TAPE=',I2,',  NDIM=',I5,',  NSET=',I5)
      END

C*****************************************************************
      SUBROUTINE SSUB (IE)
      IMPLICIT REAL (A-H,O-Z)
C
C IF YOU USE THIS PROGRAM NOT ON A CRAY-2 DELETE THE
C FOLLOWING TWO LINES
C      PARAMETER (IE77=9E12,UNDEF=UVALUE, UNDEFE=0.99*UNDEF)
C      DIMENSION X(IE), ID(4)
C      POINTER (NPX,X)
C      ALLOCATE (NPX,IE)
C AND ACTIVATE THE FOLLOWING LINES
      PARAMETER (IE77=20000,UNDEF=0.9E+10, UNDEFE=0.9*UNDEF)
      DIMENSION X(IE77), ID(4)
C NOW YOU HAVE DONE ALL CHANGES FOR STANDARD FORTRAN.
      DATA ONE /1./
      PRINT *,'ENTER SCALAR TO SUBTRACT FROM DATA: X(I) - SCALAR '
      READ(5,*,END=10) SCALAR
      PRINT *, 'TAPE2 = TAPE1-',SCALAR
      REWIND 1
C
C*  MAIN LOOP.
C
      REWIND 1
      ICNT=0
  100 READ(1,END=9920) ID
        ICNT=ICNT+1
        IF (ICNT.EQ.1) WRITE(6,6010) 'first record:', ID
        IF(ID(4).GT.IE .OR. ID(4).GT.IE77) GOTO 12
        READ(1,END=13) (X(I),I=1,ID(4))
        DO 101 I = 1,ID(4)
          IF(X(I).GT.UNDEFE) THEN
              X(I) = UNDEF
            ELSE
              X(I) = X(I)-SCALAR
            ENDIF
  101     CONTINUE
        WRITE(2) ID
        WRITE(2) (X(I),I=1,ID(4))
      GOTO 100
C
C*  ABNORMAL TERMINATION.
C
   10 WRITE(6,6010) '<INPUT> EMPTY: NO SCALAR GIVEN '
         GOTO 9910
   12 WRITE(6,6010) 'RECORD TOO LONG: ', ID, IE, IE77, ICNT
         GOTO 9910
   13 WRITE(6,6010) 'READ ERROR: ', ID, ICNT
         GOTO 9910
 9910 CONTINUE
C
C*  CAUSE AN ABORT.
C
         PRINT *,' *SSUB*: FATAL END'
         CALL MINONE(ONE,XNEGO)
         ZZ=SQRT(XNEGO)
         STOP
C
C*  NORMAL TERMINATION.
C
 9920 WRITE(6,6010) 'Last record: ', ID
      PRINT *, ' ', ICNT, ' records found'
      STOP
 6010 FORMAT(' ', A, 1I10,5I6,/1X,8I10)
      END
      SUBROUTINE MINONE(XIN,XOUT)
        XOUT=-XIN
      RETURN
      END
EOF
f77 ssub.f -o ssub.x
ssub.x $1 $2 << EOF
$3 
EOF
cp fort.2 $2
rm fort.1 fort.2
rm ssub.x ssub.f
exit