do-until 構造 (TEST AFTER ループ) を使用して、可変長テーブルのロードを制御することができます。 例えば、次のコードが実行されると、LOCATION-TABLE-LENGTH には、テーブルの最後の項目の添え字が入れられます。
DATA DIVISION.
FILE SECTION.
FD LOCATION-FILE.
01 LOCATION-RECORD.
05 LOC-CODE PIC XX.
05 LOC-DESCRIPTION PIC X(20).
05 FILLER PIC X(58).
. . .
WORKING-STORAGE SECTION.
01 FLAGS.
05 LOCATION-EOF-FLAG PIC X(5) VALUE SPACE.
88 LOCATION-EOF VALUE “YES”.
01 MISC-VALUES.
05 LOCATION-TABLE-LENGTH PIC 9(3) VALUE ZERO.
05 LOCATION-TABLE-MAX PIC 9(3) VALUE 100.
*****************************************************************
*** L O C A T I O N T A B L E ***
*** FILE CONTAINS LOCATION CODES. ***
*****************************************************************
01 LOCATION-TABLE.
05 LOCATION-CODE OCCURS 1 TO 100 TIMES
DEPENDING ON LOCATION-TABLE-LENGTH PIC X(80).
. . .
PROCEDURE DIVISION.
. . .
Perform Test After
Varying Location-Table-Length From 1 By 1
Until Location-EOF
Or Location-Table-Length = Location-Table-Max
Move Location-Record To
Location-Code (Location-Table-Length)
Read Location-File
At End Set Location-EOF To True
End-Read
End-Perform