How to use regex c++?

c++, match, regex, search

Solution

`regex_search` matches once (the first substring that match the regular expression). You need to loop.

Try following:

std::regex rgx("\\s(\\d+)");
std::smatch match;

while (std::regex_search(line, match, rgx))
{
    std::cout << match[0] << std::endl;
    line = match.suffix().str();
}

Problem

I've got a problem with c++ regex. I've got a string like "f 123/123 1234/123/124 12" and I want to get all the numbers before "/". This is my regexp: "\s(\d+)". I tried it on http://rubular.com/ and it works. Here is my code: ``` std::regex rgx("\\s(\\d+)"); std::smatch match; if (std::regex_search(line, match, rgx)) { std::cout << "Match\n"; std::string *msg = new std::string(); std::cout << "match[0]:" << match[0] << "\n"; std::cout << "match[1]:" << match[1] << "\n"; std::cout << "match[2]:" << match[2] << "\n"; } ``` But I get this: Match match[0]:123 match[1]:123 match[2]: I realize that `match[0]` is not a "groups" like in Python and Ruby.

Original source