HP 32SII Example: Program Using RPN, 14–2Solving and Integrating Programs

2.Include an INPUT instruction for each variable, including the unknown. INPUT instructions enable you to solve for any variable in a multi–variable function. INPUT for the unknown is ignored by the calculator, so you need to write only one program that contains a separate INPUT instruction for every variable (including the unknown).

If you include no INPUT instructions, the program uses the values stored in the variables or entered at equation prompts.

3.Enter the instructions to evaluate the function.

A function programmed as a multi–line RPN sequence must be in the form of an expression that goes to zero at the solution. If your equation is f(x) = g(x), your program should calculate f(x) – g(x). "=0" is implied.

A function programmed as an equation can be any type of equation—equality, assignment, or expression. The equation is evaluated by the program, and its value goes to zero at the solution. If you want the equation to prompt for variable values instead of including INPUT instructions, make sure flag 11 is set.

4.End the program with a RTN. Program execution should end with the value of the function in the X–register.

SOLVE works only with real numbers. However, if you have a complex–valued function that can be written to isolate its real and imaginary parts, SOLVE can solve for the parts separately.

Example: Program Using RPN.

Write a program using RPN operations that solves for any unknown in the equation for the "Ideal Gas Law." The equation is:

P x V= N x R x T

where

P = Pressure (atmospheres or N/m2). V = Volume (liters).

N = Number of moles of gas.

14–2 Solving and Integrating Programs

File name 32sii-Manual-E-0424
Printed Date : 2003/4/24	Size : 17.7 x 25.2 cm