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time_t time(time_t *tloc);                    //ʱ¼ä¾«¶ÈΪÃë
char *ctime(const time_t *clock);            //½«ÃëÊýת»¯Îª×Ö·û´®
timeº¯Êý·µ»Ø´Ó1970Äê1ÔÂ1ÈÕ0µãÒÔÀ´µÄÃëÊý[×¢Ò⣬´Ëº¯Êý·µ»ØµÄʱ¼ä¾«¶ÈÊÇ“Ãë”]¡£´æ´¢ÔÚtime_t ½á¹¹Ö®ÖС£²»¹ýÕâ¸öº¯ÊýµÄ·µ»ØÖµ¶ÔÓÚÎÒÃÇÀ´ËµÃ»ÓÐʲôʵ¼ÊÒâÒå¡£Õâ¸öʱºòÎÒÃÇʹÓõڶþ¸öº¯Êý½«ÃëÊýת»¯Îª×Ö·û´®¡£Õâ¸öº¯ÊýµÄ·µ»ØÀàÐÍÊǹ̶¨µÄ:Ò»¸ö¿ÉÄÜֵΪ¡£ thu dec 7 14:58:59 2000 Õâ¸ö×Ö·û´®µÄ³¤¶ÈÊǹ̶¨µÄΪ26
time_tÀàÐÍʵ¼ÊÉÏÊÇÓÉtypedef¶¨ÒåµÄ£¬²¢²»ÊÇÒ»¸öÐÂÀàÐÍ£¬¶ÔÓÚ¶àÊýϵͳÀ´Ëµ£¬time_t¾ÍÊÇlong£¬¾ßÌå×Ô¼ºÊ¹ÓõÄϵͳÊÇÓÉÄÄÖÖÀàÐÍÅÉÉúµÄ£¬¿ÉÒÔÔÚtime.hÍ·ÎļþÀïÓÃtime_t×÷ΪÌõ¼þ²éÒ»²é¾ÍÖªµÀÁË¡£
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struct tm * gmtime(const time_t *timer);
gmtime()º¯ÊýÊǽ«ÈÕÀúʱ¼äת»¯ÎªÊÀ½ç±ê׼ʱ¼ä£¨¼´¸ñÁÖÄáÖÎʱ¼ä£©£¬²¢·µ»ØÒ»¸ötm½á¹¹ÌåÀ´±£´æÕâ¸öʱ¼ä
struct tm * localtime(const time_t * timer);
localtime()º¯ÊýÊǽ«ÈÕÀúʱ¼äת»¯Îª±¾µØÊ±¼ä
 
 
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#include <time.h>  //×¢£º²»ÊÇ<sys/time.h> ·ñÔò±àÒë²»±¨´í£¬µ«ÔËÐб¨¶Î´íÎó
#include <stdio.h>
int main()
{
time_t now;
now = time(NULL);
printf("%s", ctime(&now));
return 0;
}
 
 
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#include "time.h"
#include "stdio.h"
#include "stdlib.h"
int main(void)
{
struct tm t;            //¶¨Òåtmʱ¼ä½á¹¹£¬ÓÃÀ´´æ´¢Ê±¼ä¸ñʽµÄÊý¾ÝÐÅÏ¢
time_t t_of_day;     //¶¨Òåtime_tʱ¼ä½á¹¹
t.tm_year=2006-1900;//ÒÔ1900ÄêΪ±ê×¼¼ÆËãʱ¼ä
t.tm_mon=6;                 //Ϊ½á¹¹Ìå³ÉÔ±¸³Öµ
t.tm_mday=1;
t.tm_hour=0;
t.tm_min=0;
t.tm_sec=1;
t.tm_isdst=0;
t_of_day=mktime(&t);//ʹÓÃm


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