std::mktime
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| Elemento definito nell'header <ctime>
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| std::time_t mktime( std::tm* time ); |
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Converte l'ora locale del calendario a un tempo da un'epoca come oggetto std::time_t, ignorando i valori di
time->tm_wday e time->yday. I valori delle altre componenti time non sono limitati al loro gamme abituali. Un valore negativo di time->tm_isdst provoca mktime tentare di determinare se l'ora legale era in vigore.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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In caso di successo, ricalcola e aggiorna tutti i campi in
time per soddisfare le loro gamme corretta.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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Indice |
[modifica] Parametri
| time | - | puntatore a un oggetto che specifica std::tm ora locale calendario da convertire
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. |
[modifica] Valore di ritorno
Tempo da epoca come un oggetto std::time_t in caso di successo o se -1
time non può essere rappresentato come un oggetto std::time_t.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.
You can help to correct and verify the translation. Click here for instructions.
[modifica] Esempio
Visualizzare l'ora 100 mesi fa
Original:
Display the time 100 months ago
The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
You can help to correct and verify the translation. Click here for instructions.
#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
[modifica] Vedi anche
| converte il tempo in quanto epoca di tempo del calendario espresso in ora locale 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. (funzione) | |
| C documentation for mktime
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