HP 39gII Bedienungsanleitung

HP Prime Graphing Calculator

HP Prime Tutorial Series, by Edward Shore and Klaas Kuperus: #1

The Tutorial Series

This is the third issue of a series of tutorials for the HP

Prime, written by Edward Shore. This tutorial is going

to cover a lot, each with some new programming

commands. I hope you are ready for the intensity! If

you have programmed with the HP 39g, 39g or 39gII,

you will recognize the programming as the HP Prime

programming language (HPPP) is similar. We are using

the latest firmware in this series, available on the

website.

How to start?

1. Press Shift + 1 (Program).

2. Press New. It is the second touch key.

3. Enter the name of the program. Pressing the ALPHA key twice will turn on

UPPERCASE ΑLPHA-LOCK. Pressing ALPHA, Shift, ALPHA will turn on lowercase

alpha-lock. To exit any lock, press the ALPHA key one more time. When you’re happy

with the name, press Enter.

Rules for Program Names:

1. Letters, numbers, and the underscore character (_) only.

2. The program name must start with a letter.

Structure of a HP Prime Program

A HPPP program is encased of an EXPORT - BEGIN - END structure. The layout is

generally like this:

EXPORT program_name(arguments)

BEGIN

commands and comments go here

END;

Each line containing a command generally must end with a semicolon (;). A

semicolon can by type by pressing ALPHA then the Plus key ( + ).

Comments can be typed. They are designated by two forward slashes. The slashes

are typed by pressing the Divide key ( ÷ ). Anything in the line following the two

slashes is ignored in running the program.

Visit our dedicated HP Prime portal:

http://www.hp-prime.com

HP Prime Tutorial Series, by Edward Shore and Klaas Kuperus: #1

WHILE, INPUT, KILL

HP Prime Program: TARGET. TARGET is a game where you provide a guess to get a

desired number. If you miss, the calculator will tell you if number is higher and lower.

At the end of the game, the calculator gives you how may picks you needed to get

the target number.

WHILE: Repeat a number of commands while a specific condition is test.

WHILE condition is true DO

commands

END;

Access: Tmplt, 3. Loop, 5. WHILE

Caution: Watch your ENDs! Make sure an END is with each loop and the program

itself. Press the soft key Check to check your work.

INPUT: Creates an input screen for variables. On the HP Prime, the input can asked

for more than one input. TARGET demonstrates INPUT with one prompt.

One Variable:

INPUT(variable, "title", "label", "help text")

Multi-Variable:

INPUT(list of variables, "title", list of "labels", list

of "help text")

Note: Pressing Cancel will store a 0 in variable. You may include code of what to do if

the user presses Cancel, but it is not required.

Access: Cmds, 6. I/O, 5. INPUT

KILL: Terminates program execution. Nothing dies, I promise.

Access: Tmplt. 1. Block, 3. KILL

Program:

EXPORT TARGET()

BEGIN

LOCAL C:=0, N:=RANDINT(1,20), G:=-1;

WHILE G≠N DO

C:=C+1;

INPUT(G,"Guess?","GUESS:","1 - 20");

IF G==0 THEN

KILL;

END;

IF G < N THEN

MSGBOX("Higher");

END;

IF G > N THEN

MSGBOX("Lower");

END;

MSGBOX("Correct! Score: "+C);

END;

Try it and of course, you can adjust the higher

limit. Here is something for you to try with

TARGET:

1. Add a limited amount of guesses.

2. Can you display the list of guesses?

HP Prime Tutorial Series, by Edward Shore and Klaas Kuperus: #1

WHILE, INPUT, KILL

HP Prime Program: TARGET. TARGET is a game where you provide a guess to get a

desired number. If you miss, the calculator will tell you if number is higher and lower.

At the end of the game, the calculator gives you how may picks you needed to get

the target number.

ULAM Algorithm: take an integer n. If n is even, divide it by 2. If n is odd, multiply it by

3 and add 1. ULAM counts how many steps it takes to get n to 1.

REPEAT:

Access: Tmplt, 3. Loop, 6. REPEAT

Featured:

CONCAT(list1, list2): Melds list1 and list2 into one.

Access: Toolbox, Math, 6. List, 4. Concatenate

EXPORT ULAM(N)

BEGIN

LOCAL C:=1, L0:={N};

REPEAT

IF FP(N/2)==0 THEN

N:=N/2;

ELSE

N:=3*N+1;

END;

C:=C+1;

L0:=CONCAT(L0,{N});

UNTIL N==1;

MSGBOX("NO. OF STEPS="+C);

RETURN L0;

END;

Examples:

ULAM(5) returns:

Message Box: "NO. OF STEPS=6"

List: {5, 16, 8, 4, 2, 1}

ULAM(22) returns:

Message Box: "NO. OF STEPS=16"

List: {22, 11, 34, 17, 52, 26, 13, 40, 20, 10, 5, 16, 8,

4, 2, 1}

HP Prime Tutorial Series, by Edward Shore and Klaas Kuperus: #1

GETKEY

The next section will introduce a super-important command, GETKEY. We will be

working with GETKEY over the entire series.

The Program KEYNO: The person presses key presses. Which each key press, the

code returns to the terminal screen. The program terminates when the Enter key is

pressed.

GETKEY: Returns the key code of last key pressed. The Prime's key map is below.

(Picture is from the HP Prime User's Guide)

Access: Cmds, 6. I/O, 4. GETKEY

EXPORT KEYNO()

BEGIN

LOCAL K;

PRINT();

PRINT("Press any key to get its code.");

PRINT("Press Enter to exit.");

REPEAT

K:=GETKEY;

IF K ≥ 0 THEN

PRINT(K);

END;

UNTIL K==30;

END;

Example Key Codes:

33: 8 key

2: up

7: left

8: right

12: down

50: plus

45: minus

HP Prime Tutorial Series, by Edward Shore and Klaas Kuperus: #1

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