Sharp EL-9900 - Manual (Page 47)

10
Basic Keyboard/PROGRAMMING USING THE SHARP EL-9900
Copyright © 2002, Sharp Electronics Corporation. Permission is granted to photocopy for educational use only.
1. Program the calculator to graph a random walk. A random walk can go in
any direction for a random distance. This program stops when the graph
tries to go outside the calculator display.
2. Create a new program with the name WALK. Enter the following program
and remember to press ENTER at the end of each line. If you make a
mistake, use the calculator’s editing features to correct the error.
3. Enter the following program using the Advanced Keyboard:
ClrDraw 2ndF DRAW A 1 ENTER
0
⇒D
0 STO ALPHA D ENTER
.5
⇒X
. 5 STO X/
θ/T/n ENTER
.5
⇒Y
. 5 STO ALPHA Y ENTER
Label A PRGM B 0 1 ALPHA A ENTER
.2(random–.5)
⇒H
. 2 ( MATH C 1 – . 5 ) STO
ALPHA H ENTER
.2(random–.5)
⇒K
. 2 ( MATH C 1 – . 5 ) STO
ALPHA K ENTER
Line(X,Y,X+H, 2ndF DRAW A 2 X/
θ/T/n , ALPHA
Y+K) Y , X/
θ/T/n + ALPHA H , ALPHA
Y + ALPHA K ) ENTER
X+H
⇒X
X/
θ/T/n + ALPHA H STO X/θ/T/n ENTER
Y+K
⇒Y
ALPHA Y + ALPHA K STO ALPHA
Y ENTER
If X<0 Goto B PRGM B 0 3 X/
θ/T/n MATH F
5 0 PRGM B 0 2 ALPHA B ENTER
If X>1 Goto B PRGM B 0 3 X/
θ/T/n MATH F 3 1
PRGM B 0 2 ALPHA B ENTER
If Y<0 Goto B PRGM B 0 3 ALPHA Y MATH F 5 0
PRGM B 0 2 ALPHA B ENTER
RANDOM WALKS