Radio Shack TRS-80

Type
in
the
following:
10
REM
*
DISTANCE,
RATE,
TIME PROBLEM
*E2Q33
(this
sure
is
a
slow
computer).
20 R
= 500
30
T
=
6
mm
to
D
=
r
*
t
Gzoia
Check
the
program
carefully,
then
run
ESE3
Hum de
dum
ho-hum
READY
All it
says is
READY .
The
Computer
doesn
't work!
Yes it
does. It
worked just
fine. The
Computer multiplied
500
times
6
just like we
told
it,
and came up
with the
answer of
3000
miles.
But we forgot to
tell
it
to give
us
the
answer.
Sorry
about
that.
Can
you
finish
this
program
without
help?
It only
takes
one more
line. Give it a good
try
before
reading
on
for the
answer.
That
way,
the
answer
will mean
more to you.
(Hint:
We've already
used
PRINT to print
messages
in
quotes.
What would
happen
if we
said
50
PRINT
M
D
"?..
. No,
we want
the value
of
D,
not
"D" itself. Hmmm,
what
happens
when we get
rid of the
quotes?)
RKED
ON.
THE MOVE
1
:
J
.^
-:>:?- <
vj
-
"
*" "
DON'T
RE0
BEYOND;
}&AJZ'KL-Jiih,'
saw
Look
in
Part
B
of
this
Manual
for an
answer
for this
1st
Exercise.
Also some
notes and
ideas.
Well, the answer
of
3000
is
correct, but its
"presentation"
was no
more
inspiring
than
the
printout from a
hand
calculator.
This
inevitably
leads us back
to
where we
first started
this
foray into the
unknown
—
the
PRINT
statement.
Note that we said
in
line
50
PRINT D.
There
were
no quotes
around the
letter
D like we had
used
before. The
reason is
simple but
fairly
profound. If we
want
the
Computer
to print
the
exact words
we
specify,
we
enclose
them
in
quotes.
If we
want it to
print the value
of a
variable,
in
this
case D, we
leave
the
quotes
off.
That
simple message
is worth
serious
thought before
continuing
on.
Yes,
yet
. .
.we
know: the
'distance
from Bos$qb
to Saa
Diego
isefoser
to
2§0y-r»H#$
'—
But
we
took )
a
<juick
detour via Bermuda
(besides, 3000 is
an
easiet^umbwtobe
*orkh^with)?
Md
you
think seriously
aBout
it?!
you
go!
,
Then
oti
19