How do I do the above? There is mktime function but that treats the input as expressed in local time but how do i perform the conversion if my input tm variable happens to be in UTC.
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How do I do the above? There is mktime function but that treats the input as expressed in local time but how do i perform the conversion if my input tm variable happens to be in UTC.
Use
timegm()instead ofmktime()Worth noting as pointed out by @chux – Reinstate Monica below is that
time_t timegm(struct tm *timeptr)is considered adding to the C23 standard (and thus by inclusion into the C++ standard).