Question

Given strings like the following:

   sdfsd34 
    sdfdsf1

I would like to extract: 34, 1 using c++ (STL but no boost), c.

thanks

Answer 1

You’re searching for the function string.find_last_not_of:

string str = "sdfsd34";
size_t last_index = str.find_last_not_of("0123456789");
string result = str.substr(last_index + 1);