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367
21-2 Programming Examples
Example 1 To calculate the surface area and volume of three regular
octahedrons of the dimensions shown in the table below
Store the calculation formula under the file name OCTA.
A
Length of One Side (A) Surface Area (S) Volume (V)
7 cm cm
2
cm
3
10 cm cm
2
cm
3
15 cm cm
2
cm
3
The following are the formulas used for calculating surface area S and volume V
of a regular octahedron for which the length of one side is known.
2
S = 2 3 A
2
, V = –––– A
3
3
When inputting a new formula, you first register the file name and then input the
actual program.
uu
uu
uTo register a file name
Example To register the file name OCTA
• Note that a file name can be up to eight characters long.
1. Display the program list menu and press 3 (NEW) to display a menu, which
contains the following items.
•{RUN}/{BASE} ... {general calculation}/{number base} program input
P.374 •{
QQ
QQ
Q} ... {password registration}
•{SYBL} ... {symbol menu}
2. Input the name of the file.
OCTA
• The cursor changes form to indicate alpha character input.
• The following are the characters you can use in a file name:
A through Z, r,
θ
, spaces, [, ], {, }, ’, ”, ~, 0 through 9, ., +, –, ×, ÷
• Note, however, that v and . cannot be input for the name of a program
that contains binary, octal, decimal, or hexadecimal calculations.
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