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std::asctime

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
Original:
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
Original:
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>
char* asctime( const std::tm* time_ptr );
Converte dato il tempo std::tm calendario per una rappresentazione testuale.
Original:
Converts given calendar time std::tm to a textual representation.
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La stringa risultante ha il seguente formato:
Original:
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_ptr -
puntatore a un oggetto std::tm specifica il tempo di stampa
Original:
pointer to a std::tm 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. POSIX segna questa funzione obsoleta e raccomanda std::strftime invece.
Original:
This function returns a pointer to static data and is not thread-safe. POSIX marks this function obsolete and recommends std::strftime instead.
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Il comportamento è indefinito se la stringa di output sarebbe più lungo di 25 caratteri, se timeptr->tm_wday o timeptr->tm_mon non sono entro i limiti previsti, o se supera timeptr->tm_year INT_MAX-1990.
Original:
The behavior is undefined if the output string would be longer than 25 characters, if timeptr->tm_wday or timeptr->tm_mon are not within the expected ranges, or if timeptr->tm_year exceeds INT_MAX-1990.
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Alcune implementazioni di gestire timeptr->tm_mday==0 nel senso l'ultimo giorno del mese precedente.
Original:
Some implementations handle timeptr->tm_mday==0 as meaning the last day of the preceding month.
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[modifica] Esempio

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

Output:

Tue Dec 27 16:45:52 2011

[modifica] Vedi anche

converte un oggetto time_t di una rappresentazione testuale
Original:
converts a time_t 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 asctime