Save; Status - Atari 400 Basic Reference Manual

SAVE (S.)
STATUS (ST.)
XIO (X.)
in the program, but must contain as many pieces of data as there are defined in
the READ statement. Otherwise, an "out of data" error is displayed on the
screen.
String variables used in READ statements must be dimensioned and cannot be
subscripted. (See
STRINGS
Section). Neither may array variables may be used in
a READ statement.
The DATA statement holds a number of string data for access by the READ
statement.
It
cannot include arithmetical operations, functions, etc. Further-
more, the data type in the DATA statement must match the variable type de-
fined in the corresponding READ statement.
The following program totals a list of numbers in a DATA statement:
10 FOR
t·~=1
TO 5
2~1 F.~EAD
D
30 t·1=M+D
40
t·~E>::T t·~
50 PF.~ I NT
II
SUt1 TOTAL EQUAL::;
II ;
t1
60
END
70 DATA 30 . . 15 . . 106 . . 17 . . 87
Figure 5-3 Read/Data Program Listing
The program, when executed, will print the statement:
SUM TOTAL EQUALS 255.
Format: SAVE filespec
Example:
SAVE "D1:YVONNE.P AT"
The SAVE command is similar to the CSA VE command except that the full file
name system can be used. The device code number is optional when using only
one disk drive. The default is to disk drive #1. SAVE, like LOAD, uses long inter-
record gaps on the cassette (see
CSA
VE) and the tokenized form of the program.
Format:
Example:
STATUS #aexp,avar
350 STATUS #1,Z
The STATUS command calls the STATUS routine for the specified device (aexp).
The status of the STATUS command (see
ERROR MESSAGES,
Appendix B) is
stored in the specified variable (avar). This may be useful for future devices such
as the RS-232 interface.
Format:
Example:
XIO cmdno, #aexp, aexp1, aexp2, filespec
XIO 18,#6,0,0, "S:"
The XIO command is a general input/output statement used for special opera-
tions. One example is its use to fill an area on the screen between plotted points
I/0 Commands and Devices
29