How can I add very large numbers in C++? [duplicate]

Question

How can I add very large numbers in C++?

Answer 1

consider a "bignum" library like: http://gmplib.org/ or http://ttmath.slimaczek.pl/ttmath. take a look at a simple bignum class: http://www.circlemud.org/~jelson/560/

Answer 2

Do a Google on "Bigint C++" This will provide you with a list of arbitrator precision integer arithmetic libraries.