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std::difftime

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< cpp‎ | chrono‎ | c

 
 
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initializer_list(C++11)
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Os operadores relacionais
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Relational operators
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rel_ops::operator!=
rel_ops::operator>
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rel_ops::operator>=
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Pairs and tuples
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swap
forward(C++11)
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declval(C++11)
 
 
C estilo de utilitários de data e hora
Funções
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Functions
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Manipulação do tempo
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Time manipulation
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difftime
time
clock
Conversões de formato
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Format conversions
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asctime
ctime
strftime
wcsftime
gmtime
localtime
mktime
Constantes
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CLOCKS_PER_SEC
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Defined in header <ctime>
double difftime( time_t time2, time_t time1 );
Calcula diferença entre duas horas de calendário como objetos time_t (time2 - time1) em segundos.
Original:
Computes difference between two calendar times as time_t objects (time2 - time1) in seconds.
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Índice

[editar] Parâmetros

time1, time2 -
vezes para comparar
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times to compare
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[editar] Valor de retorno

Diferença entre duas vezes no segundo
Original:
Difference between two times in seconds
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[editar] Exemplo

#include <iostream>
#include <ctime>
int main()
{
    std::time_t start = std::time(NULL);
    volatile double d;
    for(int n=0; n<10000; ++n)
       for(int m=0; m<100000; ++m)
           d += d*n*m; // some time-consuming operation
    std::cout << "Wall time passed: "
              << std::difftime(std::time(NULL), start) << " s.\n";
}

Output:

Wall time passed: 7 s.

[editar] Veja também

(C++11)
um intervalo de tempo
Original:
a time interval
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(modelo de classe) [edit]
C documentation for difftime