Casio fx-5800P User Manual page 107

The following are the formulas for determining the surface area (S) and volume (V) of a
regular octahedron when the length of one side (A) is known.
'
S = 2
The following program prompts for input of A and then outputs S and V in accordance with
the above programs.
"A" ? → A
2 × ' (3) × A
' (2) ÷ 3 × A
• Specify COMP as the run mode for the program, and assign the fi le name "OCTAHEDRON".
Operation Procedure
5 (PROG) to enter the PROG Mode.
1. Press
• This displays the Program Menu screen.
2. Press 1 (NEW).
• This displays the fi le name input screen, and automatically
alpha-lock the calculator's keyboard (
3. Enter up to 12 characters for the fi le name and then press
• This registers the fi le name and displays the run mode selection screen.
4. Press the number key that corresponds to the mode you want to assign as the program's
run mode.
• Here, press 1 (COMP). This selects COMP as the run mode, and displays the
program editing screen.
Important!
A run mode can be assigned only when you are creating a new program. You cannot
change the run mode of a program once it has been assigned.
5. Input the program.
• Here we will input the program shown below.
3 (PROG) 1 (?)
2*
• Pressing inputs a newline symbol (
'
2
2 3
3 A , V = A
3
2
3
5 (O) (C) 2 (T)
3 (PROG) 2 (→ )
3)*
2)/3*
).
(A) ) (H) c (E) s (D)
/ (R) 5 (O) 4 (N)
(") (A)
(A)
(A) x x ( )
3)
(A)
).
E-106
.
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