Hp 50g Graphing Calculator Uživatelský manuál stáhnout pdf (Strana 668)

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which indicates the position of the different stack input levels in the formula. By

comparing this result with the original formula that we programmed, i.e.,

we find that we must enter y in stack level 1 (S1), b in stack level 2 (S2), g in

stack level 3 (S3), and Q in stack level 4 (S4).

Prompt with an input string

These two approaches for identifying the order of the input data are not very

efficient. You can, however, help the user identify the variables to be used by

prompting him or her with the name of the variables. From the various methods

provided by the User RPL language, the simplest is to use an input string and the

function INPUT („°L@)@@IN@@ @INPUT@) to load your input data.

The following program prompts the user for the value of a variable a and places

the input in stack level 1:

“Enter a: “ {“:a: “ {2 0} V } INPUT OBJ→ »

This program includes the symbol :: (tag) and  (return), available through the

keystroke combinations „ê and ‚ë, both associated with the .

key. The tag symbol (::) is used to label strings for input and output. The return

symbol () is similar to a carriage return in a computer. The strings between

quotes (“ “) are typed directly from the alphanumeric keyboard.

Save the program in a variable called INPTa (for INPuT a).

Try running the program by pressing the soft menu key labeled @INPTa.

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1 2 ... 663 664 665 666 667 668 669 670 671 672 673 ... 886 887

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Hp 50g Graphing Calculator Uživatelský manuál Strana 668

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