Radio Shack TRS-80 Owner's Manual page 151

PRINTS!
,
Mi"
f"
iB$
would
produce;
JOHN
0.
DOE* 100-01
-iBi
which
could be
input#
back
Info
two
variables.
This
method
is
adequate
If
the string
data contains
no
delimiters
—
commas
or
(EMTER)
—
characters.
But
if
the data does contain delimiters or leading blanks
that
you
don't
want
to
Ignore, then
you must
supply
explicit
quotes
to
be
written
along with
the data.
For example, suppose A$=
"
DOE
»
JOHN
, "
and B$=
"
IBB
-01-001"
if
you
use
PRINT*! »A*i"
."
5B*
the
disk
image
will be:
DOE. JOHN
0,
»!0g-0i-0Bi
CtWTETO
When
you
try to
input
this
with
a statement
like
1NPUT82sA*;B*
a$
will
get the
value doe, and
b$
will
get
john
q.
—
because of
the
comma
after
doe
in
the
disk Image.
To
write
this
data so
that
it
can be Input
correctly,
you must
use the
chr$
function
to Insert explicit
double quotes
Into the disk Image. Since
34
is
the
decimal
ascii
code
for
double
quotes, use chr$(34)
as
follows:
PR
I
NT*
1
.CHR$C34) ?A$?CHR$(345
IB*
this
produces
the disk
Image
"DOE. JOHN
Q
f
"iBB-0i-B01
CENTER
)
which can be read with a simple
INPUT»2.A*B$
Mote:
You can
also
use
the
chr$
function to insert other delimiters
and
control
codes
Into the
file,
for
example:
chr$(10)
©
Line
Feed
chr$(13) carriage return
(
(ENTERl character)
chr$(1
i)
or chr$(12) line-printer top-of-form
USING
Option
This option
makes
it
easy
to
write
files
in
a carefully controlled format.
For example,
suppose:
A*="LUDWIG"
133