C++: working with big numbers?

Question

C++ / C#

I need to use numbers with 10 characters in c++. I don't need the characters after the dot. I would use an array but I need to get the root of the 3rd degree. with int everything works for me but with large numbers there is a hitch ..

Answer 1

You don't have big numbers. Look here for the type you need: en.cppreference.com/w/cpp/language/types
If not, then libraries like gmp.

Answer 2

I need to use numbers with 10 characters in c++. I don't need the characters after the dot. I would use an array but I need to get the root of the 3rd degree. everything works with int

But it seems to me that you have a complete mess in your head ... and no brief advice here will help:
- the root (at least "from the 3rd degree", at least from any) - is not extracted
- you need real numbers, but you need symbols after a dot or not - it does not matter anymore
- in the new C ++ standards there is a real type long double, the precision of which is much higher than your required 10 digits.

Answer 3

Use normal 64 bit integers (int64_t or similar names, depending on the compiler). 2^64 is 18 characters.

Answer 4

Parsed directly from the site.
ikea has the same design of all product pages, the product page itself can be opened by a direct link knowing the article www.ikea.com/ru/ru/catalog/products/60260698
Availability is again easily recognized by the article www.ikea.com/ru/ru/ catalog/stockcheck
If you look at the layout, they don't even cache pictures, they give you a direct link to ikea.
Or do you have the essence of the question - how exactly is such parsing done?
For example, pages are downloaded through curl, and the necessary content is torn out with regular expressions.

Answer 5

GET www.ikea.com/ru/ru/iows/catalog/availability/:id will return base64 xml with product availability and quantity in a particular store