Hp Prime Graphing Calculator Manuel d'utilisateur télécharger pdf (Page 521)

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101

Programming in HP PPL 515

L2(roll)+1 ▶ L2(roll);

END;

By omitting the EXPORT command when a function is

declared, its visibility can be restricted to the program

within which it is defined. For example, you could define the

ROLLDIE function inside the ROLLMANY program like this:

ROLLDIE();

EXPORT ROLLMANY(n,sides)

BEGIN

LOCAL k,roll;

// initialize list of frequencies

MAKELIST(0,X,1,2*sides,1) ▶ L2;

FOR k FROM 1 TO n DO

ROLLDIE(sides)+ROLLDIE(sides) ▶ roll;

L2(roll)+1 ▶ L2(roll);

END;

ROLLDIE(n)

BEGIN

RETURN 1+RANDINT(n-1);

END;

In the second version of the ROLLMANY program, there is

no ROLLDIE function exported from another program.

Instead, ROLLDIE is visible only to ROLLMANY. The

ROLLDIE function must be declared before it is called.

The first line of the program above contains the

declaration of the ROLLDIE function. The definition of the

ROLLDIE function is located at the end of the program.

Finally, the list of results could be returned as the result of

calling ROLLMANY instead of being stored directly in the

global list variable, L2. This way, if the user wanted to

store the results elsewhere, it could be done easily.

ROLLDIE();

EXPORT ROLLMANY(n,sides)

BEGIN

LOCAL k,roll,results;

// initialize list of frequencies

MAKELIST(0,X,1,2*sides,1) ▶ results;

1 2 ... 516 517 518 519 520 521 522 523 524 525 526 ... 615 616

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Hp Prime Graphing Calculator Manuel d'utilisateur Page 521

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