#include <iostream>
#include <string>
#include <regex>

int main()
{
  std::string s = "Hallo, Welt! Das ist ein Text";
  std::regex rex("Welt");
  std::cout << std::regex_search(begin(s), end(s), rex) << '\n';

  s = "13.11.2011";
  rex = std::regex("(\\d{1,2})\\.(\\d{1,2})\\.(\\d{4}|\\d{2})");
  std::smatch result;

  if (std::regex_search(s, result, rex))
    for (auto i = 0; i < result.size(); ++i)
    {
      std::cout << i << '\t' << result[i] << '\n';
    }
  else std::cout << "no match\n";		
}