Various parsing and output of strings. #include int main() { using namespace boost::gregorian; try { // The following date is in ISO 8601 extended format (CCYY-MM-DD) std::string s("2001-10-9"); //2001-October-09 date d(from_simple_string(s)); std::cout << to_simple_string(d) << std::endl; //Read ISO Standard(CCYYMMDD) and output ISO Extended std::string ud("20011009"); //2001-Oct-09 date d1(from_undelimited_string(ud)); std::cout << to_iso_extended_string(d1) << std::endl; //Output the parts of the date - Tuesday October 9, 2001 date::ymd_type ymd = d1.year_month_day(); greg_weekday wd = d1.day_of_week(); std::cout << wd.as_long_string() << " " << ymd.month.as_long_string() << " " << ymd.day << ", " << ymd.year << std::endl; //Let's send in month 25 by accident and create an exception std::string bad_date("20012509"); //2001-??-09 std::cout << "An expected exception is next: " << std::endl; date wont_construct(from_undelimited_string(bad_date)); //use wont_construct so compiler doesn't complain, but you wont get here! std::cout << "oh oh, you shouldn't reach this line: " << to_iso_string(wont_construct) << std::endl; } catch(std::exception& e) { std::cout << " Exception: " << e.what() << std::endl; } return 0; } ]]>