Re: assign a large integer to a cpp_int

From: John Maddock (jz.maddock_at_[hidden])
Date: 2023-05-27 19:08:25

On 27/05/2023 19:15, Matthew Mawson via Boost-users wrote:
> I want to assign a large number to a cpp_int variable like this:
>
> cpp_int large = 30414093201713378043612608166064768844377641568960512000000000000;
>
> and I get this: error: integer literal is too large to be represented in any integer type.

You're compiler is correct, there are two ways around this, the first is 
assignment from a string, which must be an explicit cast or construction:

cpp_int 
large{"30414093201713378043612608166064768844377641568960512000000000000"};

Or you can create extended precision literals, but these must be in hex 
format, see 
https://www.boost.org/doc/libs/1_82_0/libs/multiprecision/doc/html/boost_multiprecision/tut/lits.html

John.