大整数？ [英] large integers?

问题描述

全部：

我的一个朋友想要使用大约15位数的整数做一些

计算，据我所知，c99支持long long那个类型

就足够了，但是，很多编译器都不支持很长时间，所以有没有什么其他方法可以解决这个问题。 br />

解决方案

jackie说：

hi，all：

我的一个朋友想要使用大约15位数的整数做一些

计算，据我所知，c99支持long long和那种类型

就足够了但是，很多编译器都不支持很长时间，因此有任何其他方法可以解决这个问题，例如：
b获得或写出bignum。图书馆。


最常推荐的两个bignum图书馆是Miracl（由Shamus

Software Ltd提供）和GMP。 （通过GNU，不要与GIMP混淆！）。


通过网络搜索很容易找到。我上次看Miracl免费使用非商业性的b $ b使用GMP或GPL覆盖GMP，我忘了

哪个。

然而，写你自己很有趣而且很有启发性。


-

Richard Heathfield< http：// www.cpax.org.uk>

电子邮件：-http：// www。 + rjh @

谷歌用户：< http://www.cpax.org.uk/prg/writings/googly.php>

Usenet是一个奇怪的放置" - dmr 1999年7月29日

问候。


文章

< 24 *** ******** @ j33g2000pri。 googlegroups.com>，

jackie写道：

hi，all：

我的朋友之一想要使用大约15位数的整数做一些

计算，据我所知，c99支持long long和那种类型

就足够了，但是，很多编译器都没有不支持很长时间，所以有没有

解决这个问题的任何其他方法，thx ..

为什么不简单地找到编译器哪个*支持长整数？

你的朋友使用的操作系统如此模糊，比如GCC不是可用的b $ b $

问候，

Tristan


-

_

_V.-o Tristan Miller [en，（ fr，de，ia）]><空间有限

/ |` - '' - = - = - = - = - = - = - = - = - = - = - = - = - = - = - =<在ha句中，所以很难

（7_ \\ http://www.nothingisreal.com/ ><完成你的工作

Tristan Miller说：

问候。


文章

< 24 *************** ******************* @ j33g2000pri.googlegroups.com>，

jackie写道：

>全部：
我的一个朋友想要使用大约15位数的整数做一些
计算，据我所知，c99支持long long和那个类型

为什么不简单地找到*支持长整数的编译器？

嗯，公平点 - 但接下来的问题将是哦，它原来我们
毕竟需要40位整数，然后我们减少推荐

，他试图找到一个长期至少为132的编译器

比特宽...


更容易将他指向bignums。 :-)


-

Richard Heathfield< http://www.cpax.org.uk>

电子邮件：-http：// www。 + rjh @

谷歌用户：< http://www.cpax.org.uk/prg/writings/googly.php>

Usenet是一个奇怪的放置" - dmr 1999年7月29日

hi,all:
one of my pals want to use integers of about 15 digits to do some
calculation,as far as i know,c99 supports long long and that type
would be enough,but,many compiler don''t support long long,so is there
any other way to tackle this problem,thx..

解决方案

jackie said:

hi,all:
one of my pals want to use integers of about 15 digits to do some
calculation,as far as i know,c99 supports long long and that type
would be enough,but,many compiler don''t support long long,so is there
any other way to tackle this problem,thx..

Obtain, or write, a "bignum" library.

The two bignum libraries most commonly recommended are Miracl (by Shamus
Software Ltd) and "GMP" (by GNU, and not to be confused with "GIMP"!).

Either is found easily via a Web search. Miracl was free for non-commercial
use last time I looked, and GMP is covered by either GPL or LGPL, I forget
which.

Writing your own is, however, a lot of fun and rather instructive.

--
Richard Heathfield <http://www.cpax.org.uk>
Email: -http://www. +rjh@
Google users: <http://www.cpax.org.uk/prg/writings/googly.php>
"Usenet is a strange place" - dmr 29 July 1999

Greetings.

In article
<24**********************************@j33g2000pri. googlegroups.com>,
jackie wrote:

hi,all:
one of my pals want to use integers of about 15 digits to do some
calculation,as far as i know,c99 supports long long and that type
would be enough,but,many compiler don''t support long long,so is there
any other way to tackle this problem,thx..

Why not simply find a compiler which *does* support long long integers? Is
your friend using an operating system so obscure that, say, GCC is not
available for it?

Regards,
Tristan

--
_
_V.-o Tristan Miller [en,(fr,de,ia)] >< Space is limited
/ |`-'' -=-=-=-=-=-=-=-=-=-=-=-=-=-=-= < In a haiku, so it''s hard
(7_\\ http://www.nothingisreal.com/ >< To finish what you

Tristan Miller said:

Greetings.

In article
<24**********************************@j33g2000pri. googlegroups.com>,
jackie wrote:

>hi,all:
one of my pals want to use integers of about 15 digits to do some
calculation,as far as i know,c99 supports long long and that type
would be enough,but,many compiler don''t support long long,so is there
any other way to tackle this problem,thx..

Why not simply find a compiler which *does* support long long integers?

Well, fair point - but the next question will then be "oh, it turns out we
need 40-digit integers after all", and then we''re reduced to recommending
that he tries to find a compiler that has long longs that are at least 132
bits wide...

Easier to point him at bignums right off the bat. :-)

--
Richard Heathfield <http://www.cpax.org.uk>
Email: -http://www. +rjh@
Google users: <http://www.cpax.org.uk/prg/writings/googly.php>
"Usenet is a strange place" - dmr 29 July 1999

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