Existing Program To Create New Program - Casio CFX9850GBPLUS User Manual

k Using an Existing Program to Create a New Program
Sometimes you can input a new program by using a program already in memory as a
base. Simply recall the existing program, make the changes you need, and then execute
it.
Example 2 To use the OCTA program (page 8-1-2) to create a program that
calculates the surface area (cm
tetrahedrons when the length of one side is 7, 10, and 15 cm
Use TETRA as the fi le name.
A A
Use the following key operations when inputting the program.
Length of One Side A ... ! J (PRGM)4 (?)a av (A)6 (g )5 (:)
Surface Area S ............. !x (' )d* av (A)x6 (g )5 (^ )
Volume V ...................... !x (' )c/bc* av (A)M d
Compare this with the program for calculating the surface area and volume of a regular
octahedron.
Length of One Side A ... ! J (PRGM)4 (?)a av (A)6 (g )5 (:)
Surface Area S ............. c* !x (' )d* av (A)x6 (g )5 (^ )
Volume V ...................... !x (' )c/d* av (A)M d
As you can see, you can produce the TETRA program by making the following changes in
the OCTA program.
• Deleting c * (underlined using a wavy line above)
• Changing d to b c (underlined using a solid line above)
8-3-2
Editing Program Contents
The following are the formulas used for calculating surface area S
and volume V of a regular tetrahedron for which the length of one
side A is known.
S = ' 3 A S = ' 3 A
2 2
, V = , V =
20070201
2 3
) and volume (cm
' 2 ' 2
3 3
A A
–––– ––––
12 12
) of regular