boost date_time

#include <iostream>
#include <boost/date_time/gregorian/gregorian.hpp>
#include <boost/static_assert.hpp>
using namespace std;
using namespace boost::gregorian;

int _tmain(int argc, _TCHAR* argv[])
{
date d1;
date d2(2012,12,12);
date d3(2012, Jan, 1);
date d4(d2);

assert(d1==date(not_a_date_time));
assert(d2==d4);

d1=from_string("2012-12-10");
d2=(from_string("2012/12/10"));
d3=from_undelimited_string("20121210");
cout<<d1<<endl<<d2<<endl<<d3<<endl<<d4<<endl;

cout<<day_clock::local_day()<<endl;
cout<<day_clock::universal_day()<<endl;
return 0;
}

#include <iostream>
#include <boost/date_time/gregorian/gregorian.hpp>
#include <boost/static_assert.hpp>
using namespace std;
using namespace boost::gregorian;

int _tmain(int argc, _TCHAR* argv[])
{
date d(2012,3,26);
assert(d.year()==2012);
assert(d.month()==3);
assert(d.day()==26);

//一次性的获得年月日数据
date::ymd_type ymd=d.year_month_day();
assert(ymd.year==2012);
assert(ymd.month==3);
assert(ymd.day==26);

cout<<"今天是"<<d.day_of_week()<<endl;  //输出date的星期数，0表示星期日
cout<<"今天是今年的第"<<d.day_of_year()<<"天"<<endl;
cout<<"本周是今年的第"<<d.week_number()<<"周"<<endl;
cout<<"本月的最后一天是："<<d.end_of_month()<<endl;

//几种输出格式的比较
cout<<to_simple_string(d)<<endl;
cout<<to_iso_string(d)<<endl;
cout<<to_iso_extended_string(d)<<endl;
cout<<d<<endl;
return 0;
}

#include <iostream>
#include <boost/date_time/gregorian/gregorian.hpp>
#include <boost/static_assert.hpp>
using namespace std;
using namespace boost::gregorian;

int _tmain(int argc, _TCHAR* argv[])
{
days d1(100);
days d2(-100);

assert(d1+d2==days(0));
assert((d1+d2).days()==0);

weeks w(3);    //三个星期
assert(w.days()==21);

months m(5);  //5个月
years y(2);  //2年

months m2=y+m;   //2年零5个月
assert(m2.number_of_months()==29);
assert(y.number_of_years()*2==4);
return 0;
}

#include <iostream>
#include <boost/date_time/gregorian/gregorian.hpp>
#include <boost/static_assert.hpp>
using namespace std;
using namespace boost::gregorian;

//一些日期的运算

int _tmain(int argc, _TCHAR* argv[])
{
date d1(2012,3,26);
date d2(1991,2,10);
cout<<"我已经出生了"<<d1-d2<<"天了"<<endl;

d1+=days(10);
cout<<to_iso_extended_string(d1)<<endl;

d1+=months(2);
cout<<to_iso_extended_string(d1)<<endl;

d1+=weeks(1);
cout<<to_iso_extended_string(d1)<<endl;

d1-=years(2);
cout<<to_iso_extended_string(d1)<<endl;

return 0;
}

#include <iostream>
#include <boost/date_time/gregorian/gregorian.hpp>
#include <boost/static_assert.hpp>
using namespace std;
using namespace boost::gregorian;

//日期区间

int _tmain(int argc, _TCHAR* argv[])
{
date_period dp(date(2012,1,1),days(10));
assert(!dp.is_null());
assert(dp.begin().day()==1);
assert(dp.last().day()==10);
assert(dp.end().day()==11);
assert(dp.length().days()==10);

cout<<dp<<endl;
return 0;
}

#include <iostream>
#include <boost/date_time/gregorian/gregorian.hpp>
#include <boost/static_assert.hpp>
using namespace std;
using namespace boost::gregorian;

//日期区间的运算

int _tmain(int argc, _TCHAR* argv[])
{
date_period dp(date(2012,1,1),days(10));
dp.shift(days(3));
assert(dp.begin().day()==4);
assert(dp.length().days()==10);

dp.expand(days(3));
assert(dp.begin().day()==1);
assert(dp.length().days()==16);

assert(dp.is_after(date(2000,12,12)));
assert(dp.is_before(date(2013,12,12)));
assert(dp.contains(date(2012,1,2)));

return 0;
}