99 ^ 99 in C [英] 99 ^ 99 in C

问题描述

我知道在C中计算99 ^ 99非常困难。它不仅难以获得o / p而且耗费时间。


但perl口译员如何计算它（$ x = 99 ** 99;打印4x;）

秒内??? /


算法算法吧使用???

解决方案

x = 99 ** 99;打印4x;）

在几秒钟内??? /


它使用哪种算法???

< blockquote> 9月27日下午3:55，asit< lipu ... @ gmail.comwrote：

我知道计算99 ^ 99真的很难在C.它不仅难以获得o / p而且耗费时间。

你错了。

99 ^ 99在C中是0（^是XOR，不是一些指数运算符）

但perl解释器如何计算它（

x = 99 ** 99; print 4x;）

在几秒钟内??? /

它使用哪种算法？

哪个perl实现？ （不要回答）

允许实现它想要它。

偶数s / 99 **

99 / 36972963764972677265718790562880544059566876428174 11024302599724235525704552775234214106500101282327 27940978889548326540119429996769494359451621570193 644014418071060667659301384999779999159200499899 /

;-)


。对于一个严肃的回答，你可能想看看在

BIGNUM库C.

GMP是最好的免费之一。

< http://gmplib.org/>


要计算99 ** 99，你会得到：

mpz_t x;

mpz_init（x）;

mpz_ui_powm_ui（x， 99,99）; / * x = 99 ** 99 * /

/ * ... * /

mpz_clear（x）;

然而，它'重要的是要注意你不应该问更多的问题

关于gmp lib，因为它在这里是偏离主题的。

I know it is really tough to calculate 99^99 in C. Its not only
difficult but also time consuming to get the o/p.

But how perl interpreter calculates it( $x = 99 ** 99; print 4x;)
within seconds???/

which algorithm it uses ???

解决方案

x = 99 ** 99; print 4x;)
within seconds???/

which algorithm it uses ???

On Sep 27, 3:55 pm, asit <[e-mail]:

I know it is really tough to calculate 99^99 in C. Its not only
difficult but also time consuming to get the o/p.

You''re mistaken.
99^99 is 0 in C. (^ is XOR, not some expontation operator)

But how perl interpreter calculates it(

x = 99 ** 99; print 4x;)
within seconds???/
which algorithm it uses ???

Which perl implementation? (Don''t answer)
The implementation is allowed to calculate it however it wants.
Even s/99 **
99/36972963764972677265718790562880544059566876428174 11024302599724235525704552775234214106500101282327 27940978889548326540119429996769494359451621570193 644014418071060667659301384999779999159200499899/
;-)

For a serious answer, you might want to look into bignum libraries in
C.
GMP is one of the best and free.
<http://gmplib.org/>

To calculate 99 ** 99, you''d have:
mpz_t x;
mpz_init(x);
mpz_ui_powm_ui(x, 99, 99); /* x = 99 ** 99 */
/* ... */
mpz_clear(x);
However, it''s important to note you shouldn''t ask further questions
about gmp lib, since it''s off-topic here.

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