Lucid Apogee Forum

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10 REM ROCKET.BAS by Brian Tung
20 REM Modified to work with Express Basic
30 LET a = 1.032
40 LET d = 1
50 PRINT "Earth gravity in light-years per year squared: "; a
55 PRINT "Distance in light-years (0-100 million): "; d
60 IF d >= 0 AND d <= 100000000 THEN 80
70 PRINT "Distance must be between 0 and 100 million l-y"
75 END
80 LET d1 = d / 2
90 LET t = SQR(d1 * d1 + (2 * d1 / a))
100 LET x = a * t
110 LET m = 1
120 IF x >= 0 THEN 130
125 LET m = -1
130 LET s = LOG(ABS(x) + 1)
140 LET s1 = s + 1
150 LET x1 = (EXP(s) - EXP(s * -1)) / 2 - ABS(x)
160 LET s1 = x1 / (EXP(s) + EXP(s * -1)) / 2
170 LET s = s - s1
180 IF ABS(s1) > .0000001 THEN 150
190 LET t1 = 1 / a * s * m
200 LET v = a * t / SQR(1 + (a * t) * (a * t))
210 PRINT "Time on Earth: "; 2 * t; " years"
220 PRINT "Time on board: "; 2 * t1; " years"
230 SHELL "pause"

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1 REM MODIFIED TO WORK WITH EXPRESS BASIC
10 PRINT "HURKLE"
20 PRINT "CREATIVE COMPUTING  MORRISTOWN, NEW JERSEY"
30 PRINT
110 LET N=5
120 LET G=10
210 PRINT
220 PRINT "A HURKLE IS HIDING ON A ";G;" BY ";G;" GRID. HOMEBASE"
230 PRINT "ON THE GRID IS POINT 0,0 IN THE SOUTHWEST CORNER,"
235 PRINT "AND ANY POINT ON THE GRID IS DESIGNATED BY A"
240 PRINT "PAIR OF WHOLE NUMBERS. THE FIRST NUMBER IS"
245 PRINT "THE HORIZONTAL POSITION AND THE SECOND NUMBER"
246 PRINT "IS THE VERTICAL POSITION. YOU MUST TRY TO"
250 PRINT "GUESS THE HURKLE'S GRIDPOINT. YOU GET ";N;" TRIES."
260 PRINT "AFTER EACH TRY, I WILL TELL YOU THE APPROXIMATE"
270 PRINT "DIRECTION TO GO TO LOOK FOR THE HURKLE."
280 PRINT
285 LET A=INT(G*RND)
286 LET B=INT(G*RND)
290 LET K = 0
310 LET K = K + 1
320 PRINT "GUESS #";K
330 INPUT "X: ", X
335 INPUT "Y: ", Y
340 IF ABS(X-A)+ABS(Y-B)=0 THEN 500
350 REM PRINT INFO
360 GOSUB 610
370 PRINT
380 IF K <= N THEN 310
410 PRINT
420 PRINT "SORRY, THAT'S ";N;" GUESSES."
430 PRINT "THE HURKLE IS AT ";A;",";B
440 PRINT
450 PRINT "LET'S PLAY AGAIN, HURKLE IS HIDING."
460 PRINT
470 GOTO 285
500 REM
510 PRINT
520 PRINT "YOU FOUND HIM IN ";K;" GUESSES!"
540 GOTO 440
610 PRINT "GO ";
620 IF Y=B THEN 670
630 IF Y<B THEN 660
640 PRINT "SOUTH";
650 GOTO 670
660 PRINT "NORTH";
670 IF X=A THEN 720
680 IF X<A THEN 710
690 PRINT "WEST";
700 GOTO 720
710 PRINT "EAST";
720 PRINT
730 RETURN
999 END

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1 REM https://rosettacode.org/wiki/Attractive_numbers
10 FOR x = 1 TO 120
20 LET n = x
30 LET c = 0
40 IF n MOD 2 <> 0 THEN 70
50 LET n = INT(n / 2)
60 LET c = c + 1
70 IF n MOD 2 = 0 THEN 40
80 FOR i = 3 TO SQR(n) STEP 2
90 IF n MOD i <> 0 THEN 120
100 LET n = INT(n / i)
110 LET c = c + 1
120 IF n MOD i = 0 THEN 90
130 NEXT i
140 IF n <= 2 THEN 160
150 LET c = c + 1
160 IF NOT(PRIME(c)) THEN 180
170 PRINT x,
180 NEXT x
190 PRINT
200 SHELL "pause"

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1 REM https://rosettacode.org/wiki/Golden_ratio/Convergence
5 PRECISION 6
10 LET phi0 = 1
20 LET phi1 = 1 / phi0 + 1
30 LET d = ABS(phi1 - phi0)
40 LET phi0 = phi1
50 LET i = i + 1
60 IF d >= .00001 THEN 20
70 PRINT "result: "; phi1; " after "; i; " iterations"
80 PRINT "the error is approximately "; phi1 - (.5 * (1 + SQR(5)))
90 SHELL "pause"

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1 REM https://rosettacode.org/wiki/Nth_root
5 PRECISION 6
10 LET a = INT(RND * 5999) + 2
20 PRINT "nth root of "; a; "..."
30 FOR n = 1 TO 10
40 LET p = .00001
50 LET x = a
60 LET y = a / n
70 IF ABS(x - y) <= p THEN 110
80 LET x = y
90 LET y = ((n - 1) * y + a / y ^ (n - 1)) / n
100 IF ABS(x - y) > p THEN 80
110 PRINT n; " : "; y
120 NEXT n
130 SHELL "pause"

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PSET (x, y)
LINE (x1, y1)-(x2, y2)
CIRCLE (x, y), radius
COLOR doscolors
RGB red, green, blue
WAV "sync:filename.wav"

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1 REM https://rosettacode.org/wiki/Draw_a_sphere
5 CLS
10 LET j = 2
20 FOR i = 51 TO 0 STEP j * -1
30 FOR k = PI * -1 TO PI STEP .05
40 PSET (51 + i * sin(k), 52 + 51 * cos(k))
50 PSET (51 + 51 * sin(k), 52 + (i - 1) * cos(k))
60 NEXT k
70 LET j = j + 1
80 NEXT i
90 SHELL "pause"

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1 REM https://rosettacode.org/wiki/Barnsley_fern
2 CLS
5 COLOR 10
10 FOR i = 1 TO 10000
20 LET r = RND
30 IF NOT(r > 0 AND r < .01) THEN 60
40 LET x = .0
50 LET y = .16 * y
60 IF NOT(r > .01 AND r < .08) THEN 90
70 LET x = .22 * x - .26 * y
80 LET y = -.23 * x + .22 * y + 1.6
90 IF NOT(r > .075 AND r < .15) THEN 120
100 LET x = .15 * x + .28 * y
110 LET y = -.29 * x + .24 * y + .44
120 LET x = .85 * x + .04 * y
130 LET y = -.04 * x + .85 * y + 1.6
140 LET x1 = (x + 3) * 20
150 LET y1 = 200 - y * 20
160 PSET (x1, y1)
170 NEXT i
180 SHELL "pause"

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1 REM https://rosettacode.org/wiki/Mandelbrot_set
5 CLS
10 LET max = 15
20 LET w = 319
30 LET h = 199
40 LET px = 0
50 LET sy = (py - h / 2) / 150 
60 LET sx = (px - w / 2) / 150
70 LET i = 0
80 LET x = 0
90 LET y = 0
100 LET xy = x * x + y * y
110 LET xx = x * x - y * y + sx + .1
120 LET y = 2 * x * y + sy
130 LET x = xx
140 LET i = i + 1 
150 IF i < max AND xy < 1 THEN 110
160 RGB 220 + i * x, 220 + i * y, 230 + i * xy
170 PSET (px, py)
180 LET px = px + 1
190 IF px < w THEN 50
200 LET py = py + 1
210 IF py < h THEN 40
220 LOCATE 25, 1
230 SHELL "pause"

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1 REM https://rosettacode.org/wiki/Munching_squares
5 CLS
10 LET s = 255
20 FOR y = 0 TO s
30 FOR x = 0 TO s
40 LET r = x XOR y
50 RGB r, r * 2, r * 3
60 PSET (x, y)
70 NEXT x
80 NEXT y
90 LOCATE 25, 1
100 SHELL "pause"

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2 CLS
5 COLOR 15
10 FOR f = 0 TO 1000 STEP .1
20 LET x = x + SIN(f * f)
30 LET y = y + COS(f * f)
40 PSET (x + 200, y + 20)
50 NEXT f
60 SHELL "pause"