大数字库在c ++ [英] Big numbers library in c++

问题描述

我在做一个需要真正大数字的项目，最多100位数。我已经读过，java支持大整数（ java.Math.BigInteger ），我想知道是否有类似的C ++。所以，这里是我的问题：是否有一个标准或非标准的c ++库实现大整数？

I'm doing a project which requires really big numbers, up to 100 digits. I have read that java supports big integers (java.Math.BigInteger), and I want to know if there is something like that in C++. So, here is my question: Is there a standard or non-standard c++ library which implements big integers?

注意标准实现的大整数，我想要一个简单非标准。提前感谢。

Note: If there is no standard implementation for big integers, I would like a simple non-standard. Thanks in advance.

推荐答案

GNU多精度算术库会执行您想要的 http://gmplib.org/

The GNU Multiple Precision Arithmetic Library does what you want http://gmplib.org/

Gnu MP是一个C库，但它有一个 C++类接口，如果您只对大整数感兴趣，可以只处理 mpz_class 。查看我从页面 C ++接口常规中取得的示例

Gnu MP is a C library but it has a C++ class Interface and if you are interested only in big integers, you may just deal with mpz_class. Look at the sample below which I took from the page C++ Interface General

 int main (void)
 {
   mpz_class a, b, c;

   a = 1234;
   b = "-5678";
   c = a+b;
   cout << "sum is " << c << "\n";
   cout << "absolute value is " << abs(c) << "\n";

   return 0;
 }

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