在COBOL中读取STDIN(SYSIN) [英] Read STDIN (SYSIN) in COBOL

问题描述

我想从COBOL中的STDIN(又名SYSIN)中读取行.现在，我只想打印出来，这样我就知道它们了.从我正在阅读的所有内容看来，这应该可以工作:

I want to read the lines out of STDIN (aka SYSIN) in COBOL. For now I just want to print them out so that I know I've got them. From everything I'm reading it looks like this should work:

IDENTIFICATION DIVISION.
PROGRAM-ID. APP.

ENVIRONMENT DIVISION.
INPUT-OUTPUT SECTION.
FILE-CONTROL.

    SELECT SYSIN ASSIGN TO DA-S-SYSIN ORGANIZATION LINE SEQUENTIAL.

DATA DIVISION.
FILE SECTION.

FD SYSIN.
01 ln PIC X(255).
    88 EOF VALUE HIGH-VALUES.
WORKING-STORAGE SECTION.

PROCEDURE DIVISION.
    OPEN INPUT SYSIN
    READ SYSIN
      AT END SET EOF TO TRUE
    END-READ
    PERFORM UNTIL EOF
        DISPLAY ln
        READ SYSIN
            AT END SET EOF TO TRUE
        END-READ
    END-PERFORM
    CLOSE SYSIN
    STOP RUN.

可以编译(使用open-cobol和cobc -x)，但是运行它，我得到:

That compiles (using open-cobol and cobc -x), but running it I get:

libcob: File does not exist (STATUS = 35) File : ''

我在做什么错了?

推荐答案

在使它起作用的是关键字KEYBOARD.

It's the keyword KEYBOARD that makes it work.

显然，DISPLAY是STDOUT的类似词，但我尚未对此进行测试.

Apparently DISPLAY is a similar word for STDOUT, but I have not tested that.

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