Casio CLASSPAD330PLUS Modifying an Existing Program to Create a New One

12-3-2

Debugging a Program

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 (cm2) and volumes (cm3) of three regular tetrahedrons, the lengths of whose sides are 7, 10, and 15 cm

A

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.

S = 3 A2, V = 2 A3

	12
The following is the program required for this example.
Length of One Side A..........	Input A
Surface Area S....................	Print approx(	(3)	⋅ A^2)
Volume V ............................	Print approx(	(2)	⎟ 12 ⋅ 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 ⋅		(3)	⋅ A^2)
Volume V ............................	Print approx(	(2)	⎟ 3	⋅ 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⋅” (underlined with a wavy line above).

•Change 3 to 12 (underlined with double lines above).

uClassPad Operation

(1)On the application menu, tap p.

(2)Tap ~, or tap [Edit] and then [Open File].

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