This is a simple C++ wrapper around GNU MP library. Although it can be used with any bignum library, if you define an appropriate traits class.
To use it
#include "integer.h"
#include "mpz_integer_traits.h"
#include <iostream>
int main(int argc, char **argv)
{
integer a = 5, b = 8;
integer c = a * b;
std::cout << "c=" << c << '\n';
return 0;
}
and compile with
g++ -std=c++11 -Wall -I/path/to/arithmetic testint.cpp -o testint -L/path/to/gmplib -lgmp
An equally simple rational class allows working with (bignum) rational
numbers. It is parameterized by an int type, e.g. int or integer.
Here's a sort of "hello world"
#include "rational.h"
#include <iostream>
typedef basic_rational<int> rational;
int main(int argc, char **argv)
{
rational r1(1, 5), r2(3, 8);
rational r3 = r1 / r2;
std::cout << "r3=" << r3 << '\n';
return 0;
}
and also compile with
g++ -std=c++11 -Wall -I/path/to/arithmetic testrat.cpp -o testrat
BSD-3