page-1983-101-timex-sinclair-programming-tricks

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Program Listing10 LET X=INT(30*RND)20 LET Y=INT(20*RND)30 LET C=INT(256*RND)40 PRINT AT Y,X;CHR$ C50 GOTO 1092 Flashing DotWant a blinking dot in the upper left-hand corner ofthe screen? You've got it!This program clears the screen and causes that dotto blink. Timing loops in lines 20 and 40 control the lengthof time the dot is on and off.See ASCII number list for other characters to displayas a dot. We use 128.Program Listing10 CLS20 PAUSE 2030 PRINT AT O,O;CHR$ 12840 PAUSE 4050 GOTO 1093 SnowfallWhite flakes sprinkle down the screen, over andover-until you press the BREAK key. It may be uselessbut it's a lot of fun to watch!Program Listing100 FOR X=S TO 63110 FOR Y=lO TO 43120 PLOT X,Y130 NEXT Y110
140 NEXT X200 LET X=INT(63*RND}210 LET Y=INT(43*RND}220 IF Y
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IMEX/ SJ,NCLAIRODO zx-B'IRDGRAMMING
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FIRST EDITIONFIRST PRINTING©1983 b
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TipTable of ContentsPageIntroductio
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Gee Whiz37 Gee Whiz I: Smart Adder
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97 Draw A Line98 Box Message99 Boxe
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The 101 programs in this handbook c
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author's training in writing BASIC-
Page 19 and 20:
Fun & Games
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Program Listing10 RAND100 LET A=INT
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140 IF R
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130 PRINT •BACKWARD:•140 FOR J=
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110 PRINT •PRESS ANY KEY TO PLAY
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12 60-Second TimerA one-minute time
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210 IF A$=•• THEN GOTO 200220 I
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convert those raw numbers to a batt
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The program here has a temporary su
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1 Create a QuizOne of the most fasc
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line 10 for a.word. It is looking f
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program if you. don't get it right
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90 PRINT100 PRINT "ADDRESS";TAB lO;
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160 LET D$(7)=•sEE YOUR ANALYST"1
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32 Sentence WriterPractice your Eng
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160 IF GH THEN LET H=G180 GOTO 2020
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30 PRINT A$;40 GOTO 1036 Question &
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Gee Whiz
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38 Gee Whiz II:Three-Digit MysteryH
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41 Gee Whiz V: SecondAlphabet Spott
Page 63: Number Crunching
Page 66 and 67: 120 LET R::R+l125 LET W=j130 LET Z=
Page 68 and 69: 10 the computer asks for a number.
Page 70 and 71: Program Listing10 PRINT •WHAT IS
Page 72 and 73: 25 INPUT Z30 IF Z=I THEN GOTO 8035
Page 74 and 75: 70 GOTO 2080 CLS90 PRINT "THE SMALL
Page 76 and 77: 60 CLS70 PRINT "THE FRACTIONAL PORT
Page 78 and 79: 30 INPUT N35 IF N>INT N THEN GOTO 5
Page 80 and 81: Line 20 generates the numbers. Line
Page 82 and 83: Random Numbers:Distr~butionEver won
Page 84 and 85: 110 PRINT "RANDOM NUMBERS TOTAL ";T
Page 87 and 88: Money Matters
Page 89 and 90: Shopper's FriendTake your computer
Page 91 and 92: POST IS BEST BUYPOST UNIT=$0.08KELL
Page 93 and 94: ending in 95 cents. For instance, a
Page 95 and 96: 100 LET D=l-0.0l*P110 LET R=W/D120
Page 97 and 98: 100 IF H>40 THEN GOTO 140110 LET W=
Page 99 and 100: Unit price is total price divided b
Page 101: The computer generates a table of r
Page 105 and 106: 80 Screen FullFill your video scree
Page 107 and 108: gram lines to draw and seem to move
Page 109 and 110: Program Listing10 CLS100 FOR L=g TO
Page 111: There are a number of ways to get t
Page 115 and 116: Program Listing10 LET A$=• 1120 F
Page 117 and 118: 100 FOR Y=l5 TO 25 STEP 10110 FOR X
Page 119: 101 Random Bar GraphIf you don't ha
Page 123 and 124: Appendix A:Sinclair BASIC WordsHere
Page 125: StatementsCLEARCLSCONTCOPYDIMDIM $F
Page 129 and 130: ooks from ARCsoft PublishersFor the
Page 132: 101 TIMEX 1000/Sinclair ZX-81Progra
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