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std::gmtime

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gmtime
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Definido no cabeçalho <ctime>
std::tm* gmtime( const time_t* time );
Converte dado tempo desde época como std::time_t valor em tempo de calendário, expresso em Tempo Universal Coordenado (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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Índice

[editar] Parâmetros

time -
ponteiro para um objeto time_t converter
Original:
pointer to a time_t object to convert
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[editar] Valor de retorno

Ponteiro para um objeto std::tm estática interna de sucesso, ou NULL contrário. A estrutura pode compartilhado entre std::gmtime, std::localtime, std::ctime e e pode ser substituído em cada chamada.
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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[editar] Notas

Esta função pode não ser thread-safe.
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This function may not be thread-safe.
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POSIX exige que esta função define errno para EOVERFLOW se falhar porque o argumento é muito grande.
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POSIX requires that this function sets errno to EOVERFLOW if it fails because the argument is too large.
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[editar] Exemplo

#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';
}

Saída: 

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

[editar] Veja também
converte tempo desde a época de tempo do calendário expressa como hora local
Original:
converts time since epoch to calendar time expressed as local time
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(função) [edit]
Documentação C para gmtime
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