Radio Shack TRS-80 Trsdos & Disk Basic Reference Manual page 131

DISK BASIC
JOHN
Q.
DOElOO-01-001
<EN>
which could not be
INPUT
back
into
two
variables.
The
statement:
PRINTttl,
fi*.;",";B*
would
produce:
JOHN
Q.
DOE,
100-01-001
which could be
INPUT*
back
into
two
variables.
This
method
is
adequate
if
the
string data contains
no
delimiters
—
commas
or
<
EN
>
—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$="DOE,
JOHN
Q." B$="100-01-001"
If
you
use
PRINTttL flfo'V'iB*
the disk
image
will
be:
DOE,
JOHN
Q.,
100-0 1-001
<EN>
When
you
try to
input
this
with
a
statement
like
INPUT#2,
fl$,
B$
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$(34)
as
follows:
PRINTS
CHR$<34>;
fi$;
CHR$C4);
B$
this
produces the disk
image
"DOE,
JOHN
Q."100-01-001
<EN>
which can be read with
a
simple
INPUT#2,
fi$,
B$
7-45