This is a Bignum library, in C++.
Almost every arithmetic and logic operators are overloaded on the BigCub class. The only missing operation is the division.
Probably missing some logic operators. vOv
You may need C++14, and clang. Just do clang++ -Ofast -std=c++1y *.c++ -I. to have the tests compiled.
The reason behind this code was to have fun, learn how to do bignum operations and how it all worked. My choice of storing numbers in a vector is a bad idea for a serious lib, but it made me do a lot of paper binary operations!
Performances are not that bad, for a basic recurring fibonacci function, using BigCub will take only 3 times as libgmp does!