linux c 时间间隔

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

int main() {
    // 获取当前时间
    time_t start_time = time(NULL);
    printf("Start time: %s", ctime(&start_time));

    // 模拟一些操作，例如暂停5秒
    sleep(5);

    // 获取当前时间
    time_t end_time = time(NULL);
    printf("End time: %s", ctime(&end_time));

    // 计算时间间隔
    double interval = difftime(end_time, start_time);
    printf("Time interval: %.0f seconds
", interval);

    return 0;
}

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

int main() {
    struct timespec start, end;
    clock_gettime(CLOCK_MONOTONIC, &start);

    // 模拟一些操作
    sleep(1);

    clock_gettime(CLOCK_MONOTONIC, &end);

    double interval = (end.tv_sec - start.tv_sec) + (end.tv_nsec - start.tv_nsec) / 1e9;
    printf("Time interval: %.9f seconds
", interval);

    return 0;
}