How to get number with large precision as a string?

[congfairy]

I would like to get data with large precision with nlohmann, but when I use it ,the precision has lost ,is there a function to get a number with large precision to a string?

[nlohmann]

Numbers are stored as std::uint64_t, std::int64_t, or double - whatever fits best. You have no access to the originally parsed string - this is only available via the SAX interface while parsing (https://json.nlohmann.me/features/parsing/sax_interface/).