How to Extract number after decimal in wchar*?

Question

Hi,
I have some wchar* and I want to +1 the number after the sign. eg:
T1 -> T2 -> T3
T10 -> T11 -> T12
T1.1 -> T1.2 -> ... -> T1.9 -> T1.10 -> ..-> T1.100
maybe i need use regex pattern "\d+$" to separate the last number then +1
My problem is I'm not sure which syntax should use in C++
Please guide me!
Thanks you!

Answer 1

Check an approach:

#include <string>
#include <algorithm>
#include <cwctype>

. . .

std::wstring text = L"T1.9";

auto i = std::find_if_not( text.crbegin( ), text.crend( ), []( wchar_t c ) { return iswdigit( c ); } );

std::wstring p( text.cbegin( ), i.base( ) );
std::wstring n( i.base( ), text.cend( ) );

std::wstring result = p + std::to_wstring( std::stoi( n ) + 1 );
// Result: "T1.10"