//一年中的第几周
//wYear wMonth wDay 年月日
//bSundayAsFirstDay 星期天作为第一天
//返回 1～53
int GetWeeksOfYear(int wYear, int wMonth, int wDay, BOOL bMondayAsFirstDay)
{
int iWeek = 0;
//确定1月1日是星期几
COleDateTime tmStart(wYear, 1, 1, 0, 0, 0);
int iFristWeekDay = tmStart.GetDayOfWeek(); //Sunday=1
int iOffsetDay = iFristWeekDay;
if(bMondayAsFirstDay) //周日为第一天
{
iOffsetDay = (iFristWeekDay-1)%7;
}
if(iOffsetDay==0) { iOffsetDay = 7; }
COleDateTime tmCal(wYear, wMonth, wDay, 0, 0, 0);
int iTotalDays = tmCal.GetDayOfYear() - 1; //January 1 = 1
iWeek = (iTotalDays + iOffsetDay + 6)/7;
ASSERT(iWeek >= 1 && iWeek <= 53);
TRACE(_T("%04d-%02d-%02d (%d) WeekofYear=%d\n"),
wYear, wMonth, wDay, bMondayAsFirstDay, iWeek);
return iWeek;
}
//测试代码
GetWeeksOfYear(2015, 1, 1, 0);
GetWeeksOfYear(2015, 1, 1, 1);
GetWeeksOfYear(2015, 1, 3, 0);
GetWeeksOfYear(2015, 1, 3, 1);
GetWeeksOfYear(2015, 1, 4, 0);
GetWeeksOfYear(2015, 1, 4, 1);
GetWeeksOfYear(2015, 1, 5, 0);
GetWeeksOfYear(2015, 1, 5, 1);
GetWeeksOfYear(2016, 1, 1, 0);
GetWeeksOfYear(2016, 1, 1, 1);
GetWeeksOfYear(2016, 1, 2, 0);
GetWeeksOfYear(2016, 1, 2, 1);
GetWeeksOfYear(2016, 1, 3, 0);
GetWeeksOfYear(2016, 1, 3, 1);
GetWeeksOfYear(2016, 1, 4, 0);
GetWeeksOfYear(2016, 1, 4, 1);
GetWeeksOfYear(2017, 1, 1, 0);
GetWeeksOfYear(2017, 1, 1, 1);
GetWeeksOfYear(2017, 1, 2, 0);
GetWeeksOfYear(2017, 1, 2, 1);
GetWeeksOfYear(2017, 1, 7, 0);
GetWeeksOfYear(2017, 1, 7, 1);
GetWeeksOfYear(2017, 1, 8, 0);
GetWeeksOfYear(2017, 1, 8, 1);
GetWeeksOfYear(2017, 1, 9, 0);
GetWeeksOfYear(2017, 1, 9, 1);
GetWeeksOfYear(2018, 1, 1, 0);
GetWeeksOfYear(2018, 1, 1, 1);
GetWeeksOfYear(2018, 1, 6, 0);
GetWeeksOfYear(2018, 1, 6, 1);
GetWeeksOfYear(2018, 1, 7, 0);
GetWeeksOfYear(2018, 1, 7, 1);
GetWeeksOfYear(2018, 1, 8, 0);
GetWeeksOfYear(2018, 1, 8, 1);
//输出
2015-01-01 (0) WeekofYear=1
2015-01-01 (1) WeekofYear=1
2015-01-03 (0) WeekofYear=1
2015-01-03 (1) WeekofYear=1
2015-01-04 (0) WeekofYear=2
2015-01-04 (1) WeekofYear=1
2015-01-05 (0) WeekofYear=2
2015-01-05 (1) WeekofYear=2
2016-01-01 (0) WeekofYear=1
2016-01-01 (1) WeekofYear=1
2016-01-02 (0) WeekofYear=1
2016-01-02 (1) WeekofYear=1
2016-01-03 (0) WeekofYear=2
2016-01-03 (1) WeekofYear=1
2016-01-04 (0) WeekofYear=2
2016-01-04 (1) WeekofYear=2
2017-01-01 (0) WeekofYear=1
2017-01-01 (1) WeekofYear=1
2017-01-02 (0) WeekofYear=1
2017-01-02 (1) WeekofYear=2
2017-01-07 (0) WeekofYear=1
2017-01-07 (1) WeekofYear=2
2017-01-08 (0) WeekofYear=2
2017-01-08 (1) WeekofYear=2
2017-01-09 (0) WeekofYear=2
2017-01-09 (1) WeekofYear=3
2018-01-01 (0) WeekofYear=1
2018-01-01 (1) WeekofYear=1
2018-01-06 (0) WeekofYear=1
2018-01-06 (1) WeekofYear=1
2018-01-07 (0) WeekofYear=2
2018-01-07 (1) WeekofYear=1
2018-01-08 (0) WeekofYear=2
2018-01-08 (1) WeekofYear=2 |
