year

This is a discussion on year within the C++ Programming forums, part of the General Programming Boards category; How do I get the current clock year? I want to use it in my constructor ie Wine(): name("null"),bottles(){unsigned int ...

  1. #1
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    year

    How do I get the current clock year?
    I want to use it in my constructor ie
    Wine(): name("null"),bottles(){unsigned int year=0;}
    instead of just year=0

  2. #2
    Registered User Dual-Catfish's Avatar
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    NAME
    time.h - time types
    SYNOPSIS


    #include <time.h>


    DESCRIPTION
    The <time.h> header declares the structure tm, which includes at least the following members:

    int tm_sec seconds [0,61]
    int tm_min minutes [0,59]
    int tm_hour hour [0,23]
    int tm_mday day of month [1,31]
    int tm_mon month of year [0,11]
    int tm_year years since 1900
    int tm_wday day of week [0,6] (Sunday = 0)
    int tm_yday day of year [0,365]
    int tm_isdst daylight savings flag


    The value of tm_isdst is positive if Daylight Saving Time is in effect, 0 if Daylight Saving Time is not in effect, and negative if the information is not available.

    This header defines the following symbolic names:

    NULL
    Null pointer constant.
    CLK_TCK
    Number of clock ticks per second returned by the times() function (LEGACY).
    CLOCKS_PER_SEC
    A number used to convert the value returned by the clock() function into seconds.
    The <time.h> header declares the structure timespec, which has at least the following members:


    time_t tv_sec seconds
    long tv_nsec nanoseconds


    This header also declares the itimerspec structure, which has at least the following members:


    struct timespec it_interval timer period
    struct timespec it_value timer expiration


    The following manifest constants are defined:

    CLOCK_REALTIME
    The identifier of the systemwide realtime clock.
    TIMER_ABSTIME
    Flag indicating time is absolute with respect to the clock associated with a timer.
    The clock_t, clockid_t, size_t, time_t and timer_t types are defined as described in <sys/types.h>.

    Although the value of CLOCKS_PER_SEC is required to be 1 million on all XSI-conformant systems, it may be variable on other systems and it should not be assumed that CLOCKS_PER_SEC is a compile-time constant.

    The value of CLK_TCK is currently the same as the value of sysconf(_SC_CLK_TCK); however, new applications should call sysconf() because the CLK_TCK macro may be withdrawn in a future issue.

    The <time.h> header provides a declaration for getdate_err.

    The following are declared as functions and may also be defined as macros. Function prototypes must be provided for use with an ISO C compiler.


    char *asctime(const struct tm *);
    char *asctime_r(const struct tm *, char *);
    clock_t clock(void);
    int clock_getres(clockid_t, struct timespec *);
    int clock_gettime(clockid_t, struct timespec *);
    int clock_settime(clockid_t, const struct timespec *);
    char *ctime(const time_t *);
    char *ctime_r(const time_t *, char *);
    double difftime(time_t, time_t);
    struct tm *getdate(const char *);
    struct tm *gmtime(const time_t *);
    struct tm *gmtime_r(const time_t *, struct tm *);
    struct tm *localtime(const time_t *);
    struct tm *localtime_r(const time_t *, struct tm *);
    time_t mktime(struct tm *);
    int nanosleep(const struct timespec *, struct timespec *);
    size_t strftime(char *, size_t, const char *, const struct tm *);
    char *strptime(const char *, const char *, struct tm *);
    time_t time(time_t *);
    int timer_create(clockid_t, struct sigevent *, timer_t *);
    int timer_delete(timer_t);
    int timer_gettime(timer_t, struct itimerspec *);
    int timer_getoverrun(timer_t);
    int timer_settime(timer_t, int, const struct itimerspec *,
    struct itimerspec *);
    void tzset(void);


    The following are declared as variables:


    extern int daylight;
    extern long int timezone;
    extern char *tzname[];


    APPLICATION USAGE
    The range [0,61] for tm_sec allows for the occasional leap second or double leap second.
    tm_year is a signed value, therefore years before 1900 may be represented.

    The functions clock_getres(), clock_gettime(), clock_settime(), nanosleep(), timer_create(), timer_delete(), timer_getoverrun(), timer_gettime(), and timer_settime() are part of the Realtime Feature Group.

    FUTURE DIRECTIONS
    None.
    SEE ALSO
    asctime(), asctime_r(), clock(), clock_settime(), ctime(), ctime_r(), daylight, difftime(), getdate(), gmtime(), gmtime_r(), localtime(), localtime_r(), mktime(), nanosleep(), strftime(), strptime(), sysconf(), time(), timer_create(), timer_delete(), timer_settime(), timezone, tzname(), tzset(), utime().

  3. #3
    Registered User
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    Apr 2002
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    thanks!

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