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3
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 find the prime factorization of a whole number
greater than 2. This method decomposes a number into the prime factors
2, 3, 5, etc.
2. Create a new program with the name DECOMP. 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:
Input N PRGM A 3 ALPHA N ENTER
2⇒D 2 STO ALPHA D ENTER
Label A PRGM B 0 1 ALPHA A ENTER
If (N
÷D) = int PRGM B 0 3
(
ALPHA N ÷
(N÷D) Goto B ALPHA D
)
ALPHA = MATH B 0 5
(
ALPHA N ÷ ALPHA D
)
PRGM B 0 2 ALPHA B ENTER
D+1⇒D ALPHA D
+
1 STO ALPHA D
ENTER
If D ≤√N Goto A PRGM B 0 3 ALPHA D MATH
F 6 2ndF √ ALPHA N PRGM
B 0 2 ALPHA A ENTER
Goto C PRGM B 0 2 ALPHA C ENTER
Label B PRGM B 0 1 ALPHA B ENTER
N
÷D⇒N ALPHA N ÷ ALPHA D STO ALPHA
N ENTER
Print D PRGM A 1 ALPHA D ENTER
Goto A PRGM B 0 2 ALPHA A ENTER
Label C PRGM B 0 1 ALPHA C ENTER
Print N PRGM A 1 ALPHA N ENTER
End PRGM A 6 ENTER
Press 2ndF QUIT to exit the editor.
PRIME FACTORIZATION
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