获取当前的ms值

https://www.delftstack.com/howto/cpp/how-to-get-time-in-milliseconds-cpp/

获取当前epoch的ms值

 

 

 

#include <chrono>
#include <iostream>
#include <sys/time.h>
#include <ctime>

using std::cout; using std::endl;
using std::chrono::duration_cast;
using std::chrono::milliseconds;
using std::chrono::seconds;
using std::chrono::system_clock;

int main() {
    auto millisec_since_epoch = duration_cast<milliseconds>(system_clock::now().time_since_epoch()).count();
    auto sec_since_epoch = duration_cast<seconds>(system_clock::now().time_since_epoch()).count();

    cout << "seconds since epoch: " << sec_since_epoch << endl;
    cout << "milliseconds since epoch: " << millisec_since_epoch << endl;

    return EXIT_SUCCESS;
}

 

 

#include <chrono>
#include <iostream>
#include <sys/time.h>
#include <ctime>

using std::cout; using std::endl;

int main() {
    struct timeval time_now{};
    gettimeofday(&time_now, nullptr);
    time_t msecs_time = (time_now.tv_sec * 1000) + (time_now.tv_usec / 1000);

    cout << "seconds since epoch: " << time_now.tv_sec << endl;
    cout << "milliseconds since epoch: "  << msecs_time << endl << endl;

    return EXIT_SUCCESS;
}