❮ C Function Memmove C Enum ❯

C Standard Library - `<time.h>`

Introduction

The time.h header file defines four variable types, two macros, and various functions for manipulating date and time.

Library Variables

The following variable types are defined in the time.h header file:

No.	Variable & Description
1	size_t <br> This is an unsigned integer type, which is the result of the sizeof keyword.
2	clock_t <br> This is a type suitable for storing processor time.
3	time_t is <br> This is a type suitable for storing calendar time.
4	struct tm <br> This is a structure to hold time and date.

The definition of the tm structure is as follows:

struct tm {
   int tm_sec;         /* seconds, range 0 to 59        */
   int tm_min;         /* minutes, range 0 to 59        */
   int tm_hour;        /* hours, range 0 to 23        */
   int tm_mday;        /* day of the month, range 1 to 31    */
   int tm_mon;         /* month, range 0 to 11        */
   int tm_year;        /* The number of years since 1900    */
   int tm_wday;        /* day of the week, range 0 to 6    */
   int tm_yday;        /* day in the year, range 0 to 365    */
   int tm_isdst;       /* Daylight saving time        */
};

Library Macros

The following macros are defined in the time.h header file:

No.	Macro & Description
1	NULL <br> This macro is the value of a null pointer constant.
2	CLOCKS_PER_SEC <br> This macro represents the number of processor clocks per second.

Library Functions

The following functions are defined in the time.h header file: