COBOL中文件读写操作示例及技术解答

本示例演示如何在COBOL中进行文件读写操作，包括打开文件、读取记录、写入记录等基本操作。同时提供相关技术解答，解决开发者在文件处理过程中可能遇到的常见问题。

IDENTIFICATION DIVISION.
PROGRAM-ID. FileReadWriteExample.

DATA DIVISION.
FILE SECTION.
FD InputFile.
01 InputRecord.
   05 EmployeeID  PIC 9(5).
   05 EmployeeName  PIC X(20).

FD OutputFile.
01 OutputRecord.
   05 EmployeeID  PIC 9(5).
   05 EmployeeName  PIC X(20).

WORKING-STORAGE SECTION.
01 WS-EndOfFile  PIC X VALUE 'N'.

PROCEDURE DIVISION.
   OPEN INPUT InputFile.
   OPEN OUTPUT OutputFile.

   PERFORM UNTIL WS-EndOfFile = 'Y'
      READ InputFile
         AT END SET WS-EndOfFile TO 'Y'
      END-READ

      IF WS-EndOfFile = 'N'
         PERFORM ProcessRecord
         WRITE OutputRecord
      END-IF
   END-PERFORM.

   CLOSE InputFile.
   CLOSE OutputFile.

   STOP RUN.

ProcessRecord.
   DISPLAY 'Processing Record: ' EmployeeID ' ' EmployeeName.
   // 这里可以添加具体的业务逻辑，对记录进行处理

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