256 bit integer

[jrfrago]

Is there any header file that supports 256 bit integer?

[Peter87]

Very few hardware handles 256 bit integers natively. You will probably have to use some non-standard library.

[jrfrago]

That is exactly what I am looking for. Any library that supports it?

[JLBorges]

Boost Multiprecision http://www.boost.org/doc/libs/1_56_0/libs/multiprecision/doc/html/index.html

#include <boost/multiprecision/cpp_int.hpp>
#include <iostream>

int main()
{
    boost::multiprecision::cpp_int number = 1 ;
    for( int i = 2 ; i < 48 ; ++i ) number *= i ;
    std::cout << "47! == " << number << '\n' ;
}

http://coliru.stacked-crooked.com/a/3dacc4b65f820bbc

[jrfrago]

Thanks. That is impressive.