Casio CLASSPAD 330 3.04 - Manual (Page 647)

20060301
Modifying an Existing Program to Create a New One
You can use the procedure described below to recall an existing program, modify it, and then
run the result as a new program. This helps reduce key input requirements.
The following shows how to modify the “OCTA” program we created on page 12-2-1 to
handle tetrahedrons.
Example: To create a program named “TETRA” that calculates the surface areas (cm
2
) and
volumes (cm
3
) of three regular tetrahedrons, the lengths of whose sides are 7, 10,
and 15 cm
The following formulas calculate the surface area S and volume V of a
regular tetrahedron for which the length of one side A is known.
The following is the program required for this example.
Length of One Side A ..........Input A
Surface Area S ....................Print approx( (3) s A^2)
Volume V ............................Print approx( (2) w 12 s A^3)
The following is the “OCTA” program (page 12-2-1).
Length of One Side A ..........Input A
Surface Area S ....................Print approx(2 s (3) s A^2)
Volume V ............................Print approx( (2) w 3 s A^3)
A comparison of the two programs indicates that the following modifications of the “OCTA”
program will produce a program that performs the calculations required by this example.
• Delete “2 s” (underlined with a wavy line above).
• Change 3 to 12 (underlined with double lines above).
S ClassPad Operation
(1) On the application menu, tap 1.
(2) Tap }, or tap [Edit] and then [Open File].
12-3-2
Debugging a Program
S = 3 A 2 , V =
2
12
A 3
A