std::mktime
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| Defined in header <ctime>
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| std::time_t mktime( std::tm* time ); |
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std::time_tと
time->tm_wdayの値を無視して、time->ydayオブジェクトとしてエポックからの経過時間にローカルカレンダー時刻に変換します。 timeの他の構成要素の値は、それらの通常の範囲に制限されません。 time->tm_isdstの負の値は、夏時間が有効であったかどうかを判断しようとしmktimeを起こす.Original:
Converts local calendar time to a time since epoch as a std::time_t object, ignoring the values of
time->tm_wday and time->yday. The values of other components of time are not restricted to their usual ranges. A negative value of time->tm_isdst causes mktime to attempt to determine if Daylight Saving Time was in effect.The text has been machine-translated via Google Translate.
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成功した場合、それらの適切な範囲に収まるように
time内のすべてのフィールドを再計算し、更新.Original:
If successful, recalculates and updates all fields in
time to fit their proper ranges.The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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目次 |
[編集] パラメータ
| time | - | 変換するためのローカルのカレンダー時刻を指定std::tmオブジェクトへのポインタを返します
Original: pointer to a std::tm object specifying local calendar time to convert The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. |
[編集] 値を返します
成功またはstd::time_t上-1オブジェクトなど、エポックからの時間
timeがstd::time_tオブジェクトとして表現できない場合.Original:
Time since epoch as a std::time_t object on success or -1 if
time cannot be represented as a std::time_t object.The text has been machine-translated via Google Translate.
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[編集] 例
100ヶ月前の時間を表示します
Original:
Display the time 100 months ago
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#include <iostream> #include <iomanip> #include <ctime> int main() { std::time_t t = std::time(NULL); std::tm tm = *std::localtime(&t); std::cout << "Today is " << std::put_time(&tm, "%c %Z") <<'\n'; tm.tm_mon -= 100; std::mktime(&tm); std::cout << "100 months ago was " << std::put_time(&tm, "%c %Z") << '\n'; }
Output:
Today is Wed Dec 28 09:56:10 2011 EST 100 months ago was Thu Aug 28 10:56:10 2003 EDT
[編集] も参照してください
| 現地時刻で表したカレンダー時刻をエポックからの経過時間に変換します Original: converts time since epoch to calendar time expressed as local time The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (機能) | |
| C documentation for mktime
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