time.h - How do I get milliseconds since midnight UTC in C?

Question

The time function in time.h gives milliseconds since the epoch.

Answer 1

This is a simple way:

time_t seconds_since_midnight = time(NULL) % 86400;

To get approximate milliseconds since midnight, multiply seconds_since_midnight by 1000.

If you need more resolution (consider whether you really do), you will have to use another function such as gettimeofday().