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Answers

You may find that your answers to
some of the puzzles are different to
the ones givenhere. As long asthey
work on your computer then this
doesn't really matter, but checkto
see if they are as neat and simple as
the answers in the book.

Page5
Robot Missile

Line 90 tells the computer how many
times to loop round and get a guess
from you. So, for more chancesof
guessing the secret code letter,
change the last number in line 90toa
higher one. For less chances, change
it to a lower one.

Page 7
The Vital Message

In this program, lines 150 and 160area
"delay" loop. They make the computer
do nothing for a certain length of time
before going onto the nextinstruction
in the program which is to clear the

message off the screen. To makethe s zx57 LET P$-CHR$(Pe3i)
ANAO57 LET PSaCHR8 (P:78)

message stay on the screen longer,
you need to make the computer loop
round more times. You can do this by
changing the last number in line 150to
a higher one.

Page9
Shootout

To make it possible for the computer
to miss too, add the following linesin
addition to those in the "Making the
game harder" box.

155 IF RND<.1 TMEN GOTO 250
250 PRINT "HE SHOOTS BUT MISSES"
260 GOTO 90

Line 155 may need RND(1) or RND(0),
depending on your computer.

ŠI —kečeekčze—ez—za-— na aertiazni zd '

Page 11
Desert Tank Battle

Add the following lines to the program

to add the possibility of the robots
seeing you:

175 IF RNDC.OS TMHEN GOTO Z50
2450 PRINT "THEY'VE SEEN YOU-nAaGGDemH"
260 STOP

Change the RND in line 175 tothe
version your computer needs. You can
change .05 to any number between0
and 0.999, but remember that the
higher the number you put here the
greater the chance of the robots
seeing you.

Page 13
Battle at Traitor's Castle

This is a difficult puzzle, so don't worry
if you couldn't do it. Try out the answer
anyway. Add these lines to get the two
targets.

.. u4i%%% o»

55 LET PsINTI(RND4.5)84e1

70 IF LsT THEN LET RS$"RSsPS
180 LET SsSeP

v ti mA > 4 4 »

Page 15
Robot Invaders '

You can get 100 points for U, V, W,Xor
Y and 10 points for the others by
making these changes.

Z20 LET Mehs]0

225 IF P9s2>"T" AND Pec" 7" TMEN LET
Hehe 90

Page 17
Secret Weapon .

You canadd the scoring system in the