HP 48gII Graphing Calculator Instrukcja Użytkownika Pobierz pdf (Strona 698)

100

101

Page 21-49

« → x « IF ‘x<3’ THEN ‘x^2‘ ELSE ‘1-x’ END EVAL ”Done” MSGBOX

» »

and save it under the name ‘f2’. Press

J and verify that variable @@@f2@@@ is

indeed available in your variable menu. Verify the following results:

0 @@@f2@@@ Result: 0 1.2 @@@f2@@@ Result: 1.44

3.5 @@@f2@@@ Result: -2.5 10 @@@f2@@@ Result: -9

These results confirm the correct operation of the IF…THEN…ELSE…END

construct. The program, as written, calculates the function







−

otherwisex

xifx

)(

Note: For this particular case, a valid alternative would have been to use an

IFTE function of the form: ‘f2(x) = IFTE(x<3,x^2,1-x)’

Nested IF…THEN…ELSE…END constructs

In most computer programming languages where the IF…THEN…ELSE…END

construct is available, the general format used for program presentation is the

following:

IF logical_statement THEN

program_statements_if_true

ELSE

program_statements_if_false

END

In designing a calculator program that includes IF constructs, you could start

by writing by hand the pseudo-code for the IF constructs as shown above.

For example, for program @@@f2@@@, you could write

IF x<3 THEN

ELSE

1-x

END

1 2 ... 693 694 695 696 697 698 699 700 701 702 703 ... 863 864

Komentarze do niniejszej Instrukcji

Brak uwag

HP 48gII Graphing Calculator Instrukcja Użytkownika Strona 698

Komentarze do niniejszej Instrukcji

Powiązane produkty i podręczniki dla Nie HP 48gII Graphing Calculator