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Time Functions (`time.h')
This chapter groups functions used either for reporting on time
(elapsed, current, or compute time) or to perform calculations based on
The header file `time.h' defines three types. `clock_t' and
`time_t' are both used for representations of time particularly
suitable for arithmetic. (In this implementation, quantities of type
`clock_t' have the highest resolution possible on your machine, and
quantities of type `time_t' resolve to seconds.) `size_t' is also
defined if necessary for quantities representing sizes.
`time.h' also defines the structure `tm' for the traditional
representation of Gregorian calendar time as a series of numbers, with
the following fields:
Year (since 1900).
Day of week: the number of days since Sunday.
Number of days elapsed since last January 1.
Daylight Savings Time flag: positive means DST in effect, zero
means DST not in effect, negative means no information about DST
Created Mon Nov 8 17:42:54 2004 on tillpc with info_to_html version 0.9.6.