CLOSE WORK [FILE]
work-file-number
|
This document covers the following topics:
For explanations of the symbols used in the syntax diagram, see Syntax Symbols.
Related Statements: DEFINE WORK
FILE | READ WORK
FILE | WRITE WORK
FILE
Belongs to Function Group: Control of Work Files / PC Files
The statement CLOSE WORK FILE is used to close a specific
work file. It allows you to explicitly specify in a program that a work file is
to be closed.
A work file is closed automatically:
When command mode is reached.
When an end-of-file condition occurs during the execution of a
READ WORK FILE
statement.
Before a DEFINE WORK
FILE statement is executed which assigns another
file to the
work file number concerned.
| Syntax Element | Description |
|---|---|
work-file-number
|
The number of the work file (as defined to Natural) to be closed. |
** Example 'CWFEX1': CLOSE WORK FILE
************************************************************************
DEFINE DATA LOCAL
1 W-DAT (A20)
1 REC-NUM (N3)
1 I (P3)
END-DEFINE
*
REPEAT
READ WORK FILE 1 ONCE W-DAT /* READ MASTER RECORD
/*
AT END OF FILE
ESCAPE BOTTOM
END-ENDFILE
INPUT 'PROCESSING FILE' W-DAT (AD=O)
/ 'ENTER RECORDNUMBER TO DISPLAY' REC-NUM
IF REC-NUM = 0
STOP
END-IF
FOR I = 1 TO REC-NUM
/*
READ WORK FILE 1 ONCE W-DAT
/*
AT END OF FILE
WRITE 'RECORD-NUMBER TOO HIGH, LAST RECORD IS'
ESCAPE BOTTOM
END-ENDFILE
END-FOR
I := I - 1
WRITE 'RECORD' I ':' W-DAT
/*
CLOSE WORK FILE 1
/*
END-REPEAT
END