To terminate the program, simply press
(ENTER)
when prompted for a name.
To confirm that a data file has been created in RAM, press
ern
for a list
of
files. You
should see the filename:
NAMES.DO
in the list of files.
Since none was specified, the
extension"
.00"
was automatically added
to
the
filename and indicating this is a
"DOcument"
file.
Line
1tt
This statement clears the display.
Line
11t
The data file must be defined in an OPEN statement before data
aan
be
written to it. The statement:
OPEN "RAM:NAMES" FOR OUTPUT AS 1
defines a RAM file with the filename
"NAMES.DO"
which can be. used for output
with file number
1.
Note that the extension to the filename will default to
".00"
if
an extension is not specified.
Line
12t The INPUT statement prompts you to enter a name from the keyboard.
It
is
stored in the string variable N$.
Line 139 The IF statement checks for a null entry to determine the end
of
the list.
Line
148
If
a file number is added
to
the PRINT statement, as in
PRINT
#1,
N$
the items in the print list will
be
output to the file corresponding
to
the file number.
The file number must have been previously defined in an OPEN statement. In this
case, file number I is a RAM file.
Line
15t
The string variable N$ must be reset to a null string
""
in
order
to
detect a
null input in line
130. If this were not done, N$ would retain its last input value, and
a null input could not be detected.
The program loops back to Line
120
to
allow another name to be input.
Line
200
The CLOSE statement terminates access
to
the data file and marks the end
of
the file.
Since this program will be used again later in this lesson, you should save the program
by
entering:
SAVE
IEXP1"
124
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