//?正規表示法測試：信用卡號檢測
#include?<boost/regex.hpp>
#include?<iostream>

bool?validate_card_format(const?std::string?s)
{
????????static?const?boost::regex?e("(\\d{4}[-?]){3}\\d{4}");
????????return?regex_match(s,?e);
}

int?_tmain(int?argc,?_TCHAR*?argv[])
{
????std::cout?<<?(validate_card_format("1111-1111-1111-2222")?"PASS":"Error")?;?//?PASS

????return?0;
}

//?計算兩個日期相差的天數
#include?<iostream>
#include?<boost/date_time/gregorian/gregorian.hpp>

using?namespace?std;
using?namespace?boost::gregorian;

int?_tmain(int?argc,?_TCHAR*?argv[]){
????date_duration?dd?=?date(2000,?1,?1)?-?date(1900,?1,?1);
????cout?<<?"The?twentieth?century?had?"?<<?dd.days()?<<?"?days"?<<?endl;?//?36524

????dd?=?date(2100,?1,?1)?-?date(2000,?1,?1);
????cout?<<?"The?twenty-first?century?will?have?"?<<?dd.days()?<<?"?days"?<<?endl;?//?36525???
?
????return?0;
}