CTIME

̾Á°

½ñ¼°

#include <time.h>

char *asctime(const struct tm *timeptr);

char *ctime(const time_t *timep);

struct tm *gmtime(const time_t *timep);

struct tm *localtime(const time_t *timep);

time_t mktime(struct tm *timeptr);

extern char *tzname[2];
extern long int timezone;
extern int daylight;

ÀâÌÀ

´Ø¿ô asctime() ¤È mktime() ¤Ï ǯ¡¦·î¡¦Æü¤Ê¤É¤ËʬΥ¤µ¤ì¤¿¥Ð¥¤¥Ê¥ê¥Ç¡¼¥¿¤«¤é¤Ê¤ë»þ¹ïÍ×ÁǤò°ú¤­¿ô¤È¤¹¤ë¡£ »þ¹ïÍ×ÁÇ¤Ï <time.h> ¤Ç°Ê²¼¤Î¤è¤¦¤ËÄêµÁ¤µ¤ì¤Æ¤¤¤ë tm ¹½Â¤ÂΤËÊÝ»ý¤µ¤ì¤ë¡£

struct tm
{
        int     tm_sec;                 /* ÉÃ */
        int     tm_min;                 /* ʬ */
        int     tm_hour;                /* »þ´Ö */
        int     tm_mday;                /* Æü */
        int     tm_mon;                 /* ·î */
        int     tm_year;                /* ǯ */
        int     tm_wday;                /* ÍËÆü */
        int     tm_yday;                /* ǯÆâÄÌ»»Æü */
        int     tm_isdst;               /* ²Æ»þ´Ö */
};

tm ¹½Â¤ÂΤΥá¥ó¥Ð¡¼¤Ï°Ê²¼¤ÎÄ̤ê:

tm_sec

Éÿô¡¢¤Õ¤Ä¤¦¤Ï0¤«¤é59¤Þ¤Ç¤ÎÃÍ¡¢ ¤·¤«¤·±¼ÉäΤ¿¤á61¤Þ¤Ç¤ÎÃͤϵö¤µ¤ì¤ë¡£

tm_min

ʬ¿ô¡¢0¤«¤é59¤Þ¤Ç¤ÎÃÍ¡£

tm_hour

¿¿ÌëÃ椫¤é¤ÎÄÌ»»»þ´Ö¡¢0¤«¤é23¤Þ¤Ç¤ÎÃÍ¡£

tm_mday

·î¤Ï¤¸¤á¤«¤é¤ÎÆü¿ô¡¢1¤«¤é31¤Þ¤Ç¤ÎÃÍ¡£

tm_mon

1·î¤«¤é¤ÎÄÌ»»·î¿ô¡¢0¤«¤é11¤Þ¤Ç¤ÎÃÍ¡£

tm_year

1900 ǯ¤«¤é¤ÎÄÌ»»Ç¯¿ô¡£

tm_wday

ÆüÍËÆü¤«¤é¤ÎÄÌ»»Æü¿ô(ÍËÆü)¡£0¤«¤é6¤Þ¤Ç¤ÎÃÍ¡£

tm_yday

1·î1Æü¤«¤é¤ÎÄÌ»»Æü¿ô¡¢0¤«¤é365¤Þ¤Ç¤ÎÃÍ¡£

tm_isdst

²Æ»þ´Ö¤¬Í­¸ú¤«¤É¤¦¤«¤Î¥Õ¥é¥°¡£ Àµ¤ÎÃͤʤé¤Ð²Æ»þ´Ö¤ÏÍ­¸ú¤Ë¤Ê¤ê¡¢0¤Ê¤é¤Ð̵¸ú¡¢Éé¤ÎÃͤʤé¤Ð¤³¤Î¾ðÊó¤Ë¤Ï °ÕÌ£¤¬¤Ê¤¤¡£

´Ø¿ô ctime() ¤Ï¥«¥ì¥ó¥À¡¼»þ¹ï timep ¤ò

"Wed Jun 30 21:49:08 1993\n"

¤È¤¤¤¦·Á¼°¤Îʸ»úÎó¤ØÊÑ´¹¤¹¤ë¡£ ÍËÆü¤Îά¾Î¤Ï `Sun', `Mon', `Tue', `Wed', `Thu', `Fri', ¤½¤·¤Æ `Sat' ¤Ç¤¢¤ë¡£ ·î¤Îά¾Î¤Ï `Jan', `Feb', `Mar', `Apr', `May', `Jun', `Jul', `Aug', `Sep', `Oct', `Nov', ¤½¤·¤Æ `Dec' ¤Ç¤¢¤ë¡£ ÊÖ¤êÃͤÏÀÅŪ¤ÊÎΰè¤Ë³ÎÊݤµ¤ì¤¿Ê¸»úÎó¤Ø¤Î¥Ý¥¤¥ó¥¿¤Ç¤¢¤ë¡£¤³¤ÎÎΰè¤Ï Ǥ°Õ¤ÎÆüÉÕ¡¦»þ¹ï´Ø¿ô¤Î¸Æ¤Ó½Ð¤·¤Ë¤è¤Ã¤Æ¾å½ñ¤­¤µ¤ì¤¦¤ë¡£ ¤Þ¤¿¤³¤Î´Ø¿ô¤ÏÂç°èÊÑ¿ô tzname ¤Ë¸½ºß¤Î¥¿¥¤¥à¥¾¡¼¥ó¤Î¾ðÊó¤òÀßÄꤹ ¤ë¡£

´Ø¿ô gmtime() ¤Ï¥«¥ì¥ó¥À¡¼»þ¹ï timep ¤ò ¶¨ÄêÀ¤³¦»þ(UTC)¤Ç¤Î»þ¹ïÍ×ÁǤØÊÑ´¹¤¹¤ë¡£

´Ø¿ô localtime() ¤Ï¥æ¡¼¥¶¤¬ÌÀ¼¨¤·¤¿¥¿¥¤¥à¥¾¡¼¥ó¤Ç¤Î»þ¹ïÍ×ÁÇ ¤ØÊÑ´¹¤¹¤ë¡£ ¤³¤Î´Ø¿ô¤ÏÂç°èÊÑ¿ô tzname ¤Ë¸½ºß¤Î¥¿¥¤¥à¥¾¡¼¥ó¤Î¾ðÊó¤òÀßÄꤹ¤ë¡£ ¤³¤Î¤È¤­¡¢timezone ¤Ï¶¨ÄêÀ¤³¦»þ(UTC)¤È¥í¡¼¥«¥ëɸ½à»þ¤È¤Î»þº¹¤ÎÉà ¿ô¤È²ò¼á¤µ¤ì¡¢ daylight ¤¬0¤Ç¤Ê¤±¤ì¤Ðɸ½àUS²Æ»þ´Ö¥ë¡¼¥ë¤¬Å¬ÍѤµ¤ì¤ë¡£

´Ø¿ô asctime() ¤Ï»þ¹ïÍ×ÁÇ timeptr ¤ò ctime() ¤ÈƱ¤¸·Á¼°¤Îʸ»úÎó¤ØÊÑ´¹¤¹¤ë¡£ ÊÖ¤êÃͤÏÀÅŪ¤ÊÎΰè¤Ë³ÎÊݤµ¤ì¤¿Ê¸»úÎó¤Ø¤Î¥Ý¥¤¥ó¥¿¤Ç¤¢¤ë¡£¤³¤ÎÎΰè¤Ï Ǥ°Õ¤ÎÆüÉÕ¡¦»þ¹ï´Ø¿ô¤Î¸Æ¤Ó½Ð¤·¤Ë¤è¤Ã¤Æ¾å½ñ¤­¤µ¤ì¤¦¤ë¡£

´Ø¿ô mktime() ¤Ï(¥í¡¼¥«¥ë¥¿¥¤¥à¤Çµ­½Ò¤µ¤ì¤Æ¤¤¤ë)»þ¹ïÍ×ÁǤò¥«¥ì¥ó¥À¡¼»þ¹ï¤ØÊÑ´¹¤¹¤ë¡£ ¤³¤Î´Ø¿ô¤Ï»þ¹ïÍ×ÁǤΤ¦¤Á tm_wday ¤È tm_yday ¤ÎÃͤÏ̵»ë¤·¡¢ ¾¤Î»þ¹ïÍ×ÁǤ«¤é¤½¤ì¤é¤òºÆ·×»»¤¹¤ë¡£ ¹½Â¤ÂΤÎÍ×ÁǤ¬¤½¤ÎÀµ¤·¤¤ÈϰϤˤʤ¤¾ì¹ç¡¢Àµµ¬²½¤µ¤ì¤ë (¤Ä¤Þ¤ê¡¢10·î40Æü¤Ï11·î9Æü¤ËÊѹ¹¤µ¤ì¤ë)¡£ ´Ø¿ô mktime() ¤ò¸Æ¤Ó½Ð¤¹¤È¡¢ Âç°èÊÑ¿ô tzname ¤¬¸½ºß¤Î¥¿¥¤¥à¥¾¡¼¥ó¤ËÀßÄꤵ¤ì¤ë¡£ ¤â¤·»þ¹ïÍ×ÁǤò¥«¥ì¥ó¥À¡¼»þ¹ï(µª¸µ¤«¤é¤ÎÉÿô)¤Çɽ¸½¤¹¤ë¤³¤È¤¬¤Ç¤­¤Ê¤«¤Ã¤¿¤Ê¤é¤Ð¡¢ mktime() ¤Ï(time_t)(-1)¤òÊÖ¤·¡¢»þ¹ïÍ×ÁÇ tm_wday ¤È tm_yday ¤ÏÊѹ¹¤·¤Ê¤¤¡£  

½àµò

´ØÏ¢¹àÌÜ

Index

̾Á°

½ñ¼°

ÀâÌÀ

½àµò

´ØÏ¢¹àÌÜ