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DataStruct.cbl
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IDENTIFICATION DIVISION.
PROGRAM-ID. DATA-STRUCT.
DATA DIVISION.
WORKING-STORAGE SECTION.
*> c언어의 구조체처럼 그룹 변수를 통해서 변수를 묶을 수 있음
01 STUDENT. *> 그룹 변수는 PIC가 존재하지 않음
05 NAME PIC X(10). *> 그룹 변수 내부에 있는 변수를 하위 변수
05 AGE PIC 99.
05 SCORE PIC 999.
*> 그룹 변수 안에 또 다른 그룹 변수를 중첩해서 넣을 수 있음
05 ADDRESS-INFO.
10 CITY PIC X(20).
10 ZIP PIC 9(5).
*> REDEFINES를 이용하여 같은 메모리를 다른 형태로 볼 수 있음 (c언어의 union과 같음)
05 CALL-NUMBER REDEFINES ADDRESS-INFO.
10 AREA-NAME PIC 9(25).
*> 숫자 3개가 들어갈 수 있는 배열 5개 선언 (SCORE(1)로 접근)
01 SCORES.
05 NUM PIC 999 OCCURS 5 TIMES.
*> 배열 안에 구조체도 넣을 수 있음
01 COMPANY.
05 EMPLOYEE OCCURS 3 TIMES.
10 NAME PIC A(20).
10 SCORE PIC 999.
05 COUNTS PIC 9.
05 MANAGERS.
10 MANAGER_NUM PIC 999 OCCURS 1 TO 10 TIMES
DEPENDING ON COUNTS.
PROCEDURE DIVISION.
MAIN-PROCEDURE.
*> 위와 같이 지정할 경우 ADDRESS-INFO도 같이 변경됨
MOVE 1234567890123456789012345 TO AREA-NAME.
DISPLAY ZIP. *> 12345
*> 배열은 1부터 시작
MOVE 100 TO NUM(1).
MOVE 123 TO NUM(5).
DISPLAY NUM(1).
DISPLAY NUM(5).
*> MANAGER_NUM의 최대 개수를 3개로 제한
MOVE 3 TO COUNTS.
STOP RUN.
END PROGRAM DATA-STRUCT.
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