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Processing Files and Records
6.5 Updating Files
Example 6–43 (Cont.) Updating an Indexed File Randomly
FILE-CONTROL.
SELECT FLAVORS ASSIGN TO "DAIRY"
ORGANIZATION IS INDEXED
ACCESS MODE IS RANDOM
RECORD KEY IS ICE-CREAM-MASTER-KEY
ALTERNATE RECORD KEY IS ICE-CREAM-STORE-STATE
WITH DUPLICATES
ALTERNATE RECORD KEY IS ICE-CREAM-STORE-CODE.
DATA DIVISION.
FILE SECTION.
FD FLAVORS.
01 ICE-CREAM-MASTER.
02 ICE-CREAM-MASTER-KEY PIC XXXX.
02 ICE-CREAM-MASTER-DATA.
03 ICE-CREAM-STORE-CODE PIC XXXXX.
03 ICE-CREAM-STORE-ADDRESS PIC X(20).
03 ICE-CREAM-STORE-CITY PIC X(20).
03 ICE-CREAM-STORE-STATE PIC XX.
WORKING-STORAGE SECTION.
01 HOLD-ICE-CREAM-MASTER PIC X(51).
01 PROGRAM-STAT PIC X.
88 OPERATOR-STOPS-IT VALUE "1".
88 LETS-SEE-NEXT-STORE VALUE "2".
88 NO-MORE-DUPLICATES VALUE "3".
PROCEDURE DIVISION.
A000-BEGIN.
OPEN I-O FLAVORS.
PERFORM A030-RANDOM-READ UNTIL OPERATOR-STOPS-IT.
A020-EOJ.
DISPLAY "END OF JOB".
STOP RUN.
A030-RANDOM-READ.
DISPLAY "Enter key".
ACCEPT ICE-CREAM-MASTER-KEY.
PERFORM A100-READ-INPUT-BY-PRIMARY-KEY
THROUGH A100-READ-INPUT-EXIT.
DISPLAY " Do you want to terminate the session?".
PERFORM A040-GET-ANSWER UNTIL PROGRAM-STAT = "Y" OR "N".
IF PROGRAM-STAT = "Y" MOVE "1" TO PROGRAM-STAT.
A040-GET-ANSWER.
DISPLAY "Please answer Y or N"
ACCEPT PROGRAM-STAT.
A100-READ-INPUT-BY-PRIMARY-KEY.
READ FLAVORS KEY IS ICE-CREAM-MASTER-KEY
INVALID KEY DISPLAY "Master does not exist - Try again"
GO TO A100-READ-INPUT-EXIT.
DISPLAY ICE-CREAM-MASTER.
PERFORM A200-READ-BY-ALTERNATE-KEY UNTIL NO-MORE-DUPLICATES.
A100-READ-INPUT-EXIT.
EXIT.
A200-READ-BY-ALTERNATE-KEY.
DISPLAY "Do you want to see the next store in this state?".
PERFORM A040-GET-ANSWER UNTIL PROGRAM-STAT = "Y" OR "N".
IF PROGRAM-STAT = "Y"
MOVE "2" TO PROGRAM-STAT
READ FLAVORS KEY IS ICE-CREAM-STORE-STATE
INVALID KEY DISPLAY "No more stores in this state"
MOVE "3" TO PROGRAM-STAT.
(continued on next page)
6–58 Processing Files and Records