COBOL执行变化

IDENTIFICATION DIVISION.
PROGRAM-ID. HELLO.

DATA DIVISION.
   WORKING-STORAGE SECTION.
   01 WS-A PIC 9 VALUE 0.

PROCEDURE DIVISION.
   A-PARA.
   PERFORM B-PARA VARYING WS-A FROM 1 BY 1 UNTIL WS-A=5
   STOP RUN.

   B-PARA.
   DISPLAY 'IN B-PARA ' WS-A.

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