Олимпиадный тренинг

Задача . 35998


Задача

Темы:
Let x be a variable of type double that is positive. A program contains the
boolean expression (Math.pow(x,0.5) == Math.sqrt(x)). Even though x
1/2
is
mathematically equivalent to p
x, the above expression returns the value false
in a student’s program. Which of the following is the most likely reason?

(A) Math.pow returns an int, while Math.sqrt returns a double.
(B) x was imprecisely calculated in a previous program statement.
(C) The computer stores floating-point numbers with 32-bit words.
(D) There is round-off error in calculating the pow and sqrt functions.
(E) There is overflow error in calculating the pow function.

time 1000 ms
memory 32 Mb
Правила оформления программ и список ошибок при автоматической проверке задач

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