`<ctime>`

Article
12/07/2021

Includes the Standard C library header <time.h> and adds the associated names to the std namespace.

Syntax

#include <ctime>

Remarks

Including this header ensures that the names declared using external linkage in the Standard C library header are declared in the std namespace.

Constants

#define NULL
#define CLOCKS_PER_SEC
#define TIME_UTC

namespace std {
    using size_t = see below;
    using clock_t = see below ;
    using time_t = see below ;
}

Structures

struct timespec;
struct tm;

Functions

clock_t clock();
double difftime(time_t time1, time_t time0);
time_t mktime(struct tm* timeptr);
time_t time(time_t* timer);
int timespec_get(timespec* ts, int base);
char* asctime(const struct tm* timeptr);
char* ctime(const time_t* timer);
struct tm* gmtime(const time_t* timer);
struct tm* localtime(const time_t* timer);
size_t strftime(char* s, size_t maxsize, const char* format, const struct tm* timeptr);