C++ Builder 參考手冊 ? System::Dateutils ? SecondOfTheWeek
這個日期時間在所在周的第幾秒鐘 (ISO 8601)
頭文件：#include <System.DateUtils.hpp>
命名空間：System::Dateutils
函數(shù)原型：
unsigned __fastcall SecondOfTheWeek(const System::TDateTime AValue);
參數(shù)：
- AValue：日期時間類型變量雄嚣；
返回值：
- 這個日期時間在所在周的第幾秒鐘 (ISO 8601)，從 0 開始：
0:星期一的 0 時 0 分 0 秒，1:星期一的 0 時 0 分 1 秒止喷，…… - 可以用函數(shù) StartOfTheWeek 得到一個日期時間的所在周的開始時間 (星期一的 00:00:00.000 時)之碗，可以用函數(shù) EndOfTheWeek 得到一個日期時間所在周的結(jié)束時間 (星期日的 23:59:59.999)坦刀；
- 用一個日期時間減去所在周的星期一 00:00:00.000虽填，得到從星期一到這個日期時間經(jīng)過的天數(shù) (兩個日期時間類型數(shù)值相減得到 double 類型的雙精度浮點數(shù)吞彤，小數(shù)我衬，例如 0.5 表示 12 個小時)叹放，天數(shù)乘以24就得到了小時數(shù)，再乘以60得到分鐘數(shù)挠羔，再乘以 60 得到秒數(shù)井仰。
相關(guān)：
- System::Dateutils::DateOf
- System::Dateutils::DateTimeToUnix
- System::Dateutils::DayOf
- System::Dateutils::DayOfTheMonth
- System::Dateutils::DayOfTheWeek
- System::Dateutils::DayOfTheYear
- System::Dateutils::DecodeDateMonthWeek
- System::Dateutils::DecodeDateTime
- System::Dateutils::DecodeDateWeek
- System::Dateutils::EncodeDateMonthWeek
- System::Dateutils::EncodeDateTime
- System::Dateutils::EncodeDateWeek
- System::Dateutils::HourOf
- System::Dateutils::HourOfTheMonth
- System::Dateutils::HourOfTheWeek
- System::Dateutils::HourOfTheYear
- System::Dateutils::IsValidDateMonthWeek
- System::Dateutils::IsValidDateWeek
- System::Dateutils::MilliSecondOf
- System::Dateutils::MilliSecondOfTheYear
- System::Dateutils::MinuteOf
- System::Dateutils::MinuteOfTheMonth
- System::Dateutils::MinuteOfTheWeek
- System::Dateutils::MinuteOfTheYear
- System::Dateutils::MonthOf
- System::Dateutils::MonthOfTheYear
- System::Dateutils::SecondOf
- System::Dateutils::SecondOfTheMonth
- System::Dateutils::SecondOfTheYear
- System::Dateutils::TimeOf
- System::Dateutils::TryEncodeDateTime
- System::Dateutils::UnixToDateTime
- System::Dateutils::WeekOfTheMonth
- System::Dateutils::WeekOfTheYear
- System::Dateutils::WeeksInYear
- System::Dateutils::YearOf
- System::Dateutils
- System::Sysutils::CurrentYear
- System::Sysutils::Date
- System::Sysutils::DecodeDate
- System::Sysutils::DecodeDateFully
- System::Sysutils::DecodeTime
- System::Sysutils::EncodeDate
- System::Sysutils::EncodeTime
- System::Sysutils::FormatDateTime
- System::Sysutils::Now
- System::Sysutils::Time
- System::Sysutils::TryEncodeDate
- System::Sysutils::TryEncodeTime
- System::Sysutils::TryStrToDate
- System::Sysutils::TryStrToDateTime
- System::Sysutils::TryStrToTime
- System::Sysutils
C++ Builder 參考手冊 ? System::Dateutils ? SecondOfTheWeek
