Question

How to get the current time with milliseconds in C++

Answer 1

#include <chrono>
#include <iostream>

using namespace std::chrono;

int main()
{
    auto nw = system_clock::now();
    auto sysclock_milliseconds = system_clock::to_time_t(nw);
    auto fine = time_point_cast<milliseconds>(nw);

    char currenttime[sizeof "9999-12-31 23:59:59.999"];
    
    std::snprintf(currenttime + std::strftime(currenttime, sizeof currenttime - 3,
                                "%F %T.", std::localtime(&sysclock_milliseconds)),
                                4, "%03lu", fine.time_since_epoch().count() % 1000);

    std::cout << currenttime;
}




/*
run:

2023-11-22 20:27:14.780

*/

 

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