#include <string>
#include <iostream>
#include <regex>
 
int main() {
	std::regex date_pat1{ R"(\d{2}\.\d{2}\.\d{4})" };
	std::string s = "20.02.1912 and 02.08.1756.";
	std::vector<std::string> res;
 
	for(std::sregex_iterator i = std::sregex_iterator(s.begin(), s.end(), date_pat1);
                             i != std::sregex_iterator();
                             ++i)
	{
		std::smatch m = *i;
		res.push_back(m.str());
	}
	// Демо
	for (auto i: res) {
		std::cout << i << std::endl;
	}
 
	return 0;
}
 

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