<ctime> (time.h)

C Time Library

This header file contains definitions of functions to get and manipulate date and time information.

Functions

Time manipulation

clock

Clock program (function )

difftime

Return difference between two times (function)

mktime

Convert tm structure to time_t (function)

time

Get current time (function)

Conversion:

asctime

Convert tm structure to string (function)

ctime

Convert time_t value to string (function)

gmtime

Convert time_t to tm as UTC time (function )

localtime

Convert time_t to tm as local time (function)

strftime

Format time as string (function )

Macros

CLOCKS_PER_SEC

Clock ticks per second (macro)

NULL

Null pointer (macro)

types

clock_t

Clock type (type )

size_t

Unsigned integral type (type)

time_t

Time type (type)

struct tm

Time structure (type)