Question

How to get the current date and time with milliseconds accuracy in C++

Answer 1

#include <iostream>
#include <iomanip>
#include <chrono>
#include <ctime>

int main() {
    auto now = std::chrono::system_clock::now();
    
    std::time_t now_t = std::chrono::system_clock::to_time_t(now);
    std::tm* now_tm = std::gmtime(&now_t);

    std::cout << std::put_time(now_tm, "%Y-%m-%d %H:%M:%S") << "."
              << std::chrono::duration_cast<std::chrono::milliseconds>(now.time_since_epoch()).count() % 1000
              << std::endl;
}


/*
run:

2024-09-20 06:59:37.860

*/

 

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