How to store a very large number in c++ [duplicate]

Question

Is there any way to store a 1000 digit number in c++? I tried storing it to an unsigned long double but it is still to large for its type.

Answer 1

You may find your answer here How to store extremely large numbers? GMP answer sounds right, ie this is what it does with pi digits https://gmplib.org/pi-with-gmp.html

Answer 2

You have to implement it yourself or use a library for it. In particular I love GMP: https://gmplib.org/ , which is an C implementation of Big Int/Float and has C++ wrapper