linux获取微秒

#include <sys/time.h>
#include <stdio.h>

int main() {
    struct timeval tv;
    gettimeofday(&tv, NULL);
    long micros = tv.tv_usec;
    long seconds = tv.tv_sec;
    printf("Current time: %ld seconds and %ld microseconds
", seconds, micros);
    return 0;
}

#include <time.h>
#include <stdio.h>

int main() {
    struct timespec ts;
    clock_gettime(CLOCK_REALTIME, &ts);
    long micros = ts.tv_nsec / 1000; // 将纳秒转换为微秒
    long seconds = ts.tv_sec;
    printf("Current time: %ld seconds and %ld microseconds
", seconds, micros);
    return 0;
}

#include <iostream>
#include <chrono>

int main() {
    auto now = std::chrono::high_resolution_clock::now();
    auto micros = std::chrono::duration_cast<std::chrono::microseconds>(now.time_since_epoch()).count();
    std::cout << "Current time in microseconds since epoch: " << micros << "
";
    return 0;
}