Radio Shack TRS-80 Owner's Manual page 144

3-80
MODEL
Hi
DISK
SYSTEM
INPUT#
Sequential
Mead
from
Disk
"#
nmexp,
var\,var,
. .]
wl'seic
rrnsx^i
spsr.ififci
••
ssq»je:>tial
hipuiiiie
iwfiei.
nmexp-
1.2, ...,15.
raris {hs vsnabft; ngine
)o
contain the dais from
the
file,
This statement inputs data
from
a disk
file.
The
data
is
input
sequentially.
That
is,
when
the
file is first
opened,
a pointer
is
set to the
beginning of
the
file.
Each
time data
is
input, the pointer advances.
To
start
over reading from
the
beginning of
the
file,
you must
close the
file
and
re-open
it.
input#
doesn't care
how
the data
was
placed on
the disk
—
whether
a single
print#
statement put
it
there, or
whether
it
required 10
different
print#
statements.
What
matters
to
input#
are the positions of the terminating
characters
and
the
eof
marker.
To input#
data successfully
from
disk,
you need
to
know
ahead of time what
the
format of
the data
is.
Here
is
a description of
how
input#
interprets the
various characters
it
encounters
when
reading
data.
When
inputting data into a variable, basic ignores leading blanks;
when
the
first
non-blank character
is
encountered, basic assumes
it
has encountered
the
beginning of
the data item.
The
data
item ends
when
a terminating character
is
encountered or
when
a
terminating condition occurs.
The
particular terminating characters
vary,
depending on whether basic
is
inputting to a
numeric
or
string variable.
Special
Note
Here's an important exception
to
keep
in
mind
in
reading
the
following
material.
When
CEiTEH) (a
carriage return)
is
preceded by
©
(a line feed), the (ENTER)
is
not taken
as a terminator. Instead,
it
becomes
a
part
of
the
data item
(string
variable) or
is
simply ignored (numeric
variable).
(To
enter the
©
character
from
the
keyboard,
press
the
down-arrow
character.
To
enter the
(
ENTER) character, press
(ENTER)
.)
This exception
applies to
all
cases
noted below where
(ENTER)
is
said
to
be
a
terminator.
126