Apple IIe - Page 218

218 Apple lie Users Handbook
180 REM RETURN CHARACTER ENCOUNTERED
I
190 PRINT CHR$(1); X$
200 END
Notice the inclusion of the CHR$(1) prior to X$ in line 190. This
character
is included in the PRINT statement because GET
ignores the first character that is printed following its execution .
If this character is Ctrl-D , the DOS command that follows will be
printed rather than executed as a DOS command . The CHR$(1)
in
the PRINT statement in line 190 can be ignored as it has no
special meaning. This allows the program to function properly.
Closing a Sequential File
Once a file has been opened, it should be closed. Failing to close
a
file can result in the loss of data in the file left open as well as
possible loss of data on another diskette.
Configuration
CLOSE [ filename ]
When CLOSE is used without a filename parameter, all open files
on all diskettes will be closed. If filename is specifi'ed with
CLOSE , the specified file will be closed.
APPEND
The DOS APPEND command allows the user to place the file
pointer for a sequential file at the end o·f the last data item. Since
the file pointer is reset after a file has been closed and re-
opened , APPEND is a useful command--especially in situations
where the user wishes to add text to the end of a sequential file.
Configuration
APPEND filename [ , Sx, Vx, Dx]
The APPEND command will place the fileJ>0inter to the first
character
position beyond the end of the fil \ If data is written to