!
! =====> Program - P103.F90
!
!
! CLASS LIST UPDATE PROGRAM
! USING A LINEAR SEARCH BY ID - NOT SORTED
! ADDITIONS AT END OF FILE
!
! DECLARE ARRAYS FOR FILE
!
CHARACTER (LEN=25) :: NAMES(100),NAME
INTEGER ID(100),MARKS(100,7),GRADES(7)
!
PRINT *, 'This is Program >> P103 = Update with Linear Search'
!
! Tell program where data for READ is coming from
OPEN(UNIT=5, FILE='P103.DAT') ! UNIT=5 is the default input
!
!
!==== READ IN FILE AND STORE IN MAIN MEMORY
!
L1: DO J=1,100
READ 15,ID(J),NAMES(J),(MARKS(J,I),I=1,7)
15 FORMAT(I7,1X,A25,7I3)
IF(ID(J) == 0) GO TO 101
Print 15,ID(J),NAMES(J),(MARKS(J,I),I=1,7)
END DO L1
16 FORMAT(/'TOO MUCH DATA FOR DEFINED ARRAYS'/ &
'INCREASE ARRAY SIZE AND RERUN'//)
STOP
!
!==== READ AND PROCESS UPDATE CARDS
!
101 NREC=J-1
PRINT 102,NREC
102 FORMAT(/'CLASS LIST UPDATE PROGRAM '/ &
I5,' RECORDS ON FILE')
L2: DO J=1,100
READ 15,KID,NAME,GRADES
IF(KID == 0) THEN
NUPD=J-1
PRINT 203,NUPD
203 FORMAT(/I5,' UPDATES PROCESSED'/ &
/ 'UPDATED CLASS LIST'//)
!
L3: DO K=1,NREC
PRINT 211,ID(K),NAMES(K),(MARKS(K,I),I=1,7)
211 FORMAT(I10,2X,A25,7I5)
!
!=== LEAVE A BLANK LINE EVERY 5
!
IF(MOD(K,5) == 0) PRINT * ! Nothing = a blank line
END DO L3
STOP
ELSE
CALL SCANID(ID,NREC,KID,KPOS)
IF(KPOS <= 0) THEN
!
!==== GOODIE! WE HAVE A NEW MEMBER OF THE CLASS
! ADD AT THE END
!
NREC=NREC+1
IF(NREC > 100) THEN
PRINT 220,KID,NAME
220 FORMAT(/'ARRAYS FULL - UNABLE TO ADD',I10,2X,A25)
STOP
ENDIF
!
!==== DO ACTUAL UPDATE
!
ID(NREC)=KID
NAMES(NREC)=NAME
L4: DO I=1,7
MARKS(NREC,I)=GRADES(I)
END DO L4
ELSE
!
!==== THIS STUDENT IS ON FILE - UPDATE ANY NONZERO ENTRY IN GRADES
! INTO THE ARRAY MARKS
!
L5: DO I=1,7
IF(GRADES(I) /= 0) THEN ! grades(i) not zero
MARKS(KPOS,I)=GRADES(I)
END IF
END DO L5
ENDIF
ENDIF
END DO L2
STOP
END
!
SUBROUTINE SCANID(LIST,N,KEY,KPOS)
INTEGER LIST(N),KEY
!
!==== LINEAR SEARCH
!
L1: DO I=1,N
IF(KEY == LIST(I)) GO TO 100
END DO L1
KPOS=0
RETURN
100 KPOS=I
RETURN
END
DATA:
9414154 Opus 15 16 16 17 17 39 76
9613986 Bloom Milo 16 17 16 18 17 41 79
9412978 Dallas Steven 13 12 11 13 14 31 64
9613693 Cat Bill the 18 18 19 17 19 41 82
9515010 John Cutter 15 16 15 15 15 38 77
9510633 Jones Oliver W 17 17 18 17 17 42 80
9513221 Mike Binkley 19 19 19 18 19 45 91
0000000 Dummy 0 0 0 0 0 0 0
9712526 Snoopy 0 0 0 0 0 48 0
9973522 Charlie Brown 0 0 0 0 0 0 95
9613986 Linus Van Pelt 0 0 0 0 0 0 80
9515010 Woodstock 0 0 0 0 19 0 0
0000000
OUTPUT:
Program entered
This is Program >> P103 = Update with Linear Search
9414154 Opus 1 51 61 61 71 73 97 6
9613986 Bloom Milo 1 61 71 61 81 74 17 9
9412978 Dallas Steven 1 31 21 11 31 43 16 4
9613693 Cat Bill the 1 81 81 91 71 94 18 2
9515010 John Cutter 1 51 61 51 51 53 87 7
9510633 Jones Oliver W 1 71 71 81 71 74 28 0
9513221 Mike Binkley 1 91 91 91 81 94 59 1
CLASS LIST UPDATE PROGRAM
7 RECORDS ON FILE
4 UPDATES PROCESSED
UPDATED CLASS LIST
9414154 Opus 1 51 61 61 71 73 97 6
9613986 Bloom Milo 1 61 71 61 81 74 8 9
9412978 Dallas Steven 1 31 21 11 31 43 16 4
9613693 Cat Bill the 1 81 81 91 71 94 18 2
9515010 John Cutter 1 51 61 51 1 9 87 7
9510633 Jones Oliver W 1 71 71 81 71 74 28 0
9513221 Mike Binkley 1 91 91 91 81 94 59 1
9712526 Snoopy 0 0 0 0 4 8 0
9973522 Charlie Brown 0 0 0 0 0 9 5
Fortran-90 STOP
Page builder: Charles Boivin
Last modified: 11/07/95