86
5.1.3 BSD (BASIC Sequential Access, Data File) Control Statements
Note: For
file
descriptors
FD
and CMT
WOPEN #
WOPEN
#3
"FD2:S Opens the file for write-in so that one BASIC sequential
PRINT #
CLOSE #
KILL #
ROPEN #
INPUT #
EO
DATA
1" access file (BSD) can be made. In other words, it defines
the filename
of
the BSD being made as "SEQ
DATAl",
and opens,
as
logical number 3, a file
in
floppy disk drive
number
2.
PRINT
#3.
A.
AS
Writes in, in order, the content of variable A and string
variable
AS
on BSD; a file opened in logical number 3
by
the WOPEN # statement.
File close is executed by the
CLOSE # statement, and
BSD
is
formally registered as one BSD.
CLOSE
#3
Closes the BSD, the file opened in logical number 3 by
(Corresponding to the
WOPEN # statement.
WOPEN#)
KILL
#3
By closing the file, one BSD with the file name specified
by the WOPEN # statement
is
made on the specified
floppy disk, and the logical number
(3
in this instance)
becomes undefined once more.
Kills the BSD, the file opened
in
logical number 3 by the
WOPEN # statement. In other words, it cancels
or
erases
the BSD, and the logical number
(3
in this instance)
becomes undefined once more.
ROPEN
#4.
n
FD2:
SE
Opens the file for read-out of the data in the BASIC
o DATA2· sequential access data
file
(BSD). In other words, it
opens,
as
logical number
4,
the BSD file "SEQ DATA2"
in volume number 7 of the floppy disk in floppy disk drive
number
2.
INPUT
#4.
A(1).
BS
Reads out sequential data from the BSD, a file opened in
logical number 4 by the ROPEN # statement, and
substitutes numerical data in array variable
A(
1)
and
string in string variable B$.
Read-in data are sequentia,lIy accessed from the BSD
heading data.
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