To understand that the next character in the string is a number?

Question

C++ / C#

Hello. Can you tell me how to convert a character/string to a number in C++?
And how to determine what this number is?

Answer 1

As usual - numbers have their own characters "0123456789" that follow each other - you need to compare the character code - it must be between '0' and '9', then add characters to some buffer, and when a character other than digital is encountered - do something. Of course, there are a lot of libraries, but we are considering the general case - when libraries cannot be used.