HP 15C Instrukcja Użytkownika Pobierz pdf (Strona 36)

36 Section 3: The Memory Stack, LAST X, and Data Storage

Keystrokes

Display

287.0000

Reverses the function that

produced the wrong answer.

13.9 +

20.6475

The correct answer.

Calculator Functions and the Stack

When you want to key in two numbers, one after the other, you press

v between entries of the numbers. However, when you want to key

in a number immediately following any function (including manipulations

like )), you do not need to use v. Why? Executing most HP-15C

functions has this additional effect:



The automatic memory stack is lift-enabled that is, the stack will lift

automatically when the next number is keyed or recalled into the

display.



Digit entry is terminated, so the next number starts a new entry.

lost

Keys:

There are four functions  v, `, z, and w  that disable stack

lift.

They do not provide for the lifting of the stack when the next number is

keyed in or recalled. Following the execution of one of these functions, a new

number will simple write over the currently displayed number instead of causing

the stack to lift. (Although the stack lifts when v is pressed, it will not lift

when the next number is keyed in or recalled. The operation of v

illustrated on page 34 shows how v thus disables the stack.) In most

      

about them.

− will also disable the stack lift if digit entry is terminated, making − clear the entire display like

`. Otherwise, it is neutral. For a further discussion of the stack, refer to appendix B.

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HP 15C Instrukcja Użytkownika Strona 36