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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本地日历时间转换成一个划时代的时间，因为作为std::time_t对象，而忽略
time->tm_wday和time->yday的值。其他组件time的值并不限于其通常范围。负值的time->tm_isdst导致mktime如果夏令时在试图确定.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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如果成功的话，会重新计算并更新中的所有字段
time，以满足他们适当的范围内.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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目录 |
[编辑] 参数
| time | - | 指针指定本地日历的时间来转换到std::tm对象
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. |
[编辑] 返回值
因为时代的成功或std::time_t-1不能表示为一个
time对象作为std::time_t对象的时间.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.
You can help to correct and verify the translation. Click here for instructions.
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[编辑] 为例
显示100个月前的时间
Original:
Display the time 100 months ago
The text has been machine-translated via Google Translate.
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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
[编辑] 另请参阅
| 因为时代的日历时间转换时间为本地时间表示 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. （函数） | |
| C documentation for mktime
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