Is there a TryParse equivalent in C++ (gcc)?

Question

Is there a equivalent of TryParse in C++(gcc) ?

I would like to parse a string which may contain (+31321) and store it as long. I know phone numbers are stored as st

Answer 1

In fact, before convert the string into a number, the numbers should be "normalized" to a common format. This requires removing all symbols, and replace them with proper representation.

But you must be very care about representing telephone numbers (that are NOT numbers: they are not subjected to regular arithmetic) as string: Number beginning with one or more zeroes are not the same as the ones with the zeroes removed:

00 is the typical replacement for +, but a number without the 00 (or +) in front should be prefixed by 00c where c is the country code.

You need to do some pre-processing to come to a uniform string representation, before converting, otherwise you risk to "alias" different things.