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Varianti

std::gmtime

Da cppreference.com.
< cpp‎ | chrono‎ | c

 
 
Utilità libreria
Tipo di supporto (basic types, RTTI, type traits)
Gestione della memoria dinamica
La gestione degli errori
Programma di utilità
Funzioni variadic
Data e ora
Funzione oggetti
initializer_list(C++11)
bitset
hash(C++11)
Gli operatori relazionali
Original:
Relational operators
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rel_ops::operator!=
rel_ops::operator>
rel_ops::operator<=
rel_ops::operator>=
Coppie e tuple
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Pairs and tuples
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pair
tuple(C++11)
piecewise_construct_t(C++11)
piecewise_construct(C++11)
Swap, in avanti e spostare
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Swap, forward and move
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swap
forward(C++11)
move(C++11)
move_if_noexcept(C++11)
declval(C++11)
 
 
C-stile di data e ora utilità
Funzioni
Original:
Functions
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Tempo di manipolazione
Original:
Time manipulation
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difftime
time
clock
Formato conversioni
Original:
Format conversions
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asctime
ctime
strftime
wcsftime
gmtime
localtime
mktime
Costanti
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Constants
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CLOCKS_PER_SEC
Tipi
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Types
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tm
time_t
clock_t
 
Defined in header <ctime>
std::tm* gmtime( const time_t* time );
Converte dato il tempo da epoca come valore std::time_t nel tempo civile, espressa in Coordinated Universal Time (UTC).
Original:
Converts given time since epoch as std::time_t value into calendar time, expressed in Coordinated Universal Time (UTC).
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Indice

[modifica] Parametri

time -
puntatore a un oggetto time_t da convertire
Original:
pointer to a time_t object to convert
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[modifica] Valore di ritorno

Puntatore a un oggetto statico std::tm interno in caso di successo, o NULL altrimenti. La struttura può condivisa tra std::gmtime, std::localtime e std::ctime e può essere sovrascritto ad ogni invocazione.
Original:
Pointer to a static internal std::tm object on success, or NULL otherwise. The structure may shared between std::gmtime, std::localtime, and std::ctime and may be overwritten on each invocation.
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[modifica] Note

Questa funzione potrebbe non essere thread-safe.
Original:
This function may not be thread-safe.
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POSIX richiede che questa funzione imposta errno per EOVERFLOW se fallisce perché l'argomento è troppo grande.
Original:
POSIX requires that this function sets errno to EOVERFLOW if it fails because the argument is too large.
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[modifica] Esempio

#include <iostream>
#include <iomanip>
#include <ctime>
 
int main()
{
    std::time_t t = std::time(NULL);
    std::cout << "UTC:   " << std::put_time(std::gmtime(&t), "%c %Z") << '\n'
              << "local: " << std::put_time(std::localtime(&t), "%c %Z") << '\n';
}

Output:

UTC:   Wed Dec 28 11:44:28 2011 GMT
local: Wed Dec 28 06:44:28 2011 EST

[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
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(funzione) [edit]
C documentation for gmtime