Overview of Functions
The C date and time operations are defined in the time.h header file (ctime header in C++).
| Identifier | Description | |
|---|---|---|
| Time manipulation |
difftime |
computes the difference between times |
time |
returns the current time of the system as time since the epoch (which is usually the Unix epoch) | |
clock |
returns a processor tick count associated with the process | |
| Format conversions |
asctime |
converts a tm object to a textual representation |
ctime |
converts a time_t object to a textual representation |
|
strftime |
converts a tm object to custom textual representation |
|
wcsftime |
converts a tm object to custom wide string textual representation |
|
gmtime |
converts time since the epoch to calendar time expressed as Universal Coordinated Time | |
localtime |
converts time since the epoch to calendar time expressed as local time | |
mktime |
converts calendar time to time since the epoch | |
| Constants | CLOCKS_PER_SEC |
number of processor clock ticks per second |
| Types | tm |
calendar time type |
time_t |
time since the epoch type | |
clock_t |
process running time type |
Read more about this topic: C Date And Time Functions
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