COBOL文件处理示例与技术解答

本示例演示了如何在COBOL中处理文件，包括文件的读取、写入和更新。同时提供了一些常见的问题解答和技术建议，帮助开发人员更好地理解COBOL文件处理的实现方式。

IDENTIFICATION DIVISION.
PROGRAM-ID. FileProcessingExample.

DATA DIVISION.
FILE SECTION.
FD InputFile.
01 InputRecord.
   05 EmpID     PIC 9(5).
   05 EmpName   PIC X(20).
   05 EmpSalary PIC 9(8)V99.

FD OutputFile.
01 OutputRecord.
   05 EmpID     PIC 9(5).
   05 EmpName   PIC X(20).
   05 EmpSalary PIC 9(8)V99.

WORKING-STORAGE SECTION.
01 EndOfFileFlag   PIC X VALUE 'N'.

PROCEDURE DIVISION.
    OPEN INPUT InputFile.
    OPEN OUTPUT OutputFile.

    PERFORM UNTIL EndOfFileFlag = 'Y'
        READ InputFile
            AT END SET EndOfFileFlag TO 'Y'
        END-READ.

        IF EndOfFileFlag = 'N'
            PERFORM ProcessRecord
            WRITE OutputRecord
        END-IF.
    END-PERFORM.

    CLOSE InputFile.
    CLOSE OutputFile.

    STOP RUN.

ProcessRecord.
    ADD 1000 TO EmpSalary.

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