A library for very large integer arithmetics.
include the bigint.hpp
in your cpp file and see the examples below:
#include "bigint.hpp"
// Initialization
bigint a = "123123123123123123123";
bigint b("123123");
bigint d = "-9999";
// Operations
++a;
bigint c = a + b;
c = a - b;
cout << c * "123456789";
if(b > "200") cout << "greater than 200";