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std::difftime

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< cpp‎ | chrono‎ | c

 
 
 
 
C-style utilitaires date et l'heure
Fonctions
Original:
Functions
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La manipulation du temps
Original:
Time manipulation
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difftime
time
clock
Les conversions de format
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Format conversions
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asctime
ctime
strftime
wcsftime
gmtime
localtime
mktime
Constantes
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Constants
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CLOCKS_PER_SEC
Types
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Types
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tm
time_t
clock_t
 
Defined in header <ctime>
double difftime( time_t time2, time_t time1 );
Calcule la différence entre deux fois civiles comme des objets time_t (time2 - time1) en quelques secondes .
Original:
Computes difference between two calendar times as time_t objects (time2 - time1) in seconds.
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Sommaire

[modifier] Paramètres

time1, time2 -
fois à comparer
Original:
times to compare
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[modifier] Retourne la valeur

Différence entre deux heures en quelques secondes
Original:
Difference between two times in seconds
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[modifier] Exemple

#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";
}

Résultat :

Wall time passed: 7 s.

[modifier] Voir aussi

(C++11)
un intervalle de temps
Original:
a time interval
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(classe générique) [edit]
C documentation for difftime