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std::ctime

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
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Functions
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Tempo di manipolazione
Original:
Time manipulation
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difftime
time
clock
Formato conversioni
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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>
char* ctime( const std::time_t* time );
Converte dato il tempo da epoca ad un tempo calendario locale e quindi a una rappresentazione testuale, come se chiamando std::asctime(std::localtime(time)). La stringa risultante ha il seguente formato:
Original:
Converts given time since epoch to a calendar local time and then to a textual representation, as if by calling std::asctime(std::localtime(time)). The resulting string has the following format:
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Www Mmm dd hh:mm:ss yyyy
  • Www - il giorno della settimana (uno dei Mon, Tue, Wed, Thu, Fri, Sat, Sun).
    Original:
    Www - the day of the week (one of Mon, Tue, Wed, Thu, Fri, Sat, Sun).
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  • Mmm - il mese (uno dei Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec).
    Original:
    Mmm - the month (one of Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec).
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  • dd - il giorno del mese
    Original:
    dd - the day of the month
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  • hh - ore
    Original:
    hh - hours
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  • mm - minuti
    Original:
    mm - minutes
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  • ss - secondi
    Original:
    ss - seconds
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  • yyyy - anni
    Original:
    yyyy - years
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La funzione non supporta la localizzazione.
Original:
The function does not support localization.
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Indice

[modifica] Parametri

time -
puntatore a un oggetto std::time_t specifica il tempo di stampa
Original:
pointer to a std::time_t object specifying the time to print
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[modifica] Valore di ritorno

Puntatore ad una stringa con terminazione null personaggio che tiene la rappresentazione testuale di data e ora. La stringa può essere condiviso tra std::asctime e std::ctime, e può essere sovrascritto ad ogni invocazione di una di queste funzioni.
Original:
Pointer to a static null-terminated character string holding the textual representation of date and time. The string may be shared between std::asctime and std::ctime, and may be overwritten on each invocation of any of those functions.
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[modifica] Note

Questa funzione restituisce un puntatore a dati statici e non è thread-safe. Inoltre, modifica l'oggetto statico std::tm che possono essere condivise con std::gmtime e std::localtime. POSIX segna questa funzione obsoleta e raccomanda std::strftime invece.
Original:
This function returns a pointer to static data and is not thread-safe. In addition, it modifies the static std::tm object which may be shared with std::gmtime and std::localtime. POSIX marks this function obsolete and recommends std::strftime instead.
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Il comportamento può essere definito per i valori di time_t che risultato nella stringa più lunga di 25 caratteri (ad esempio: anno 10000)
Original:
The behavior may be undefined for the values of time_t that result in the string longer than 25 characters (e.g. year 10000)
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[modifica] Esempio

#include <ctime>
#include <iostream>
 
int main()
{
    std::time_t result = std::time(NULL);
    std::cout << std::ctime(&result);
}

Output:

Tue Dec 27 17:21:29 2011

[modifica] Vedi anche

converte un oggetto tm di una rappresentazione testuale
Original:
converts a tm object to a textual representation
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(funzione) [edit]
converte un oggetto personalizzato per tm rappresentazione testuale
Original:
converts a tm object to custom textual representation
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(funzione) [edit]
(C++11)
i formati e le uscite di un valore data / ora secondo il formato specificato
Original:
formats and outputs a date/time value according to the specified format
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(funzione di modello) [edit]
C documentation for ctime