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    std::chrono::system_clock::now

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    <metanoindex/>

     
    C++
     
    Utilities-Bibliothek
     
    Datum und Uhrzeit Versorgungsunternehmen
     
    std::chrono::system_clock
    Member-Funktionen
    Original:
    Member functions
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    system_clock::now
    system_clock::to_time_t
    system_clock::from_time_t
     
    <tbody> </tbody>
    static std::chrono::time_point<std::chrono::system_clock> now();
    		 (seit C++11)
    Gibt einen Zeitpunkt repräsentiert mit dem aktuellen Zeitpunkt .
    Original:
    Returns a time point representing with the current point in time.
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    Parameter

    (None)
    Original:
    (none)
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    Rückgabewert

    Ein Zeitpunkt, der die aktuelle Zeit .
    Original:
    A time point representing the current time.
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    Ausnahmen

    noexcept specification:  
    <tbody> </tbody>
    noexcept
      (seit C++11)

    Beispiel

    #include <iostream>
#include <vector>
#include <chrono>

int main()
{
    for (unsigned long long size = 1; size < 10000000; size *= 10) {
        auto start = std::chrono::system_clock::now();
        std::vector<int> v(size, 42);
        auto end = std::chrono::system_clock::now();

        auto elapsed = end - start;
        std::cout << size << ": " << elapsed.count() << '\n';
    }
}

    Possible output: 

    1: 1
10: 2
100: 3
1000: 6
10000: 47
100000: 507
1000000: 4822