Question

How to get time since epoch in seconds with C

Answer 1

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

int main(void)
{
    struct timespec ts;
    
    timespec_get(&ts, TIME_UTC);

    printf("Time since epoch: %ld seconds", ts.tv_sec);
}




/*
run:

Time since epoch: 1676041889 seconds

*/

 

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Answer 2

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

int main(void)
{
    time_t seconds;

    seconds = time(NULL);

    printf("Time since epoch: %ld seconds", seconds);
}




/*
run:

Time since epoch: 1676042147 seconds

*/

 

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