linux man page : mktime - Unix Time À» ¾ò¾î¿Â´Ù.
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mktime

Unix Time ½Ã°£À» °¡Á®¿Â´Ù.

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#include <time.h> 
 
time_t mktime(struct tm *tm); 
 

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mktime ÇÔ¼ö´Â ÀÎÀÚ·Î ¹ÞÀº ½Ã°£ ±¸Á¶Ã¼ timeptrÀÇ °ªÀ» Unix Time ½Ã°£À¸·Î º¯°æ½ÃŲ´Ù.

struct tm ±¸Á¶Ã¼ÀÇ ¿øÇüÀÌ´Ù.
struct tm { 
    int tm_sec;         /* seconds */ 
    int tm_min;         /* minutes */ 
    int tm_hour;        /* hours */ 
    int tm_mday;        /* day of the month */ 
    int tm_mon;         /* month */ 
    int tm_year;        /* year */ 
    int tm_wday;        /* day of the week */ 
    int tm_yday;        /* day in the year */ 
    int tm_isdst;       /* daylight saving time */ 
}; 
 
tm ±¸Á¶Ã¼ÀÇ ¸â¹öº¯¼ö¿¡ ´ëÇÑ ¼³¸íÀÌ´Ù.
  • tm_sec : 0 - 59 ±îÁöÀÇ ÃÊ
  • tm_min : 0 - 59 ±îÁöÀÇ ºÐ
  • tm_hour : 0 - 23 ±îÁöÀÇ ½Ã
  • tm_mday : 1 - 31 ±îÁöÀÇ ÀÏ
  • tm_mon : 0 - 11 ±îÁöÀÇ ¿ù
  • tm_year : ³âµµ·Î 1900³âÀÌ ½ÃÀÛ ³âÀ¸·Î ÇÑ´Ù.
  • tm_wday : ÀÏ¿äÀÏ ºÎÅÍÀÇ ÀÏ , 0 - 6
  • tm_yday : 1¿ù 1ÀÏ ºÎÅÍÀÇ ÀÏ, 0 - 365
  • tm_isdst : Àϱ¤Àý¾à ½Ã°£À» Àû¿ëÇÒ °ÍÀÎÁö.
¿ù°ú ³âµµ¸¦ Á¤ÇÒ ¶§ ÁÖÀÇÇØ¾ß ÇÑ´Ù. ¿¹¸¦ µé¾î 2000³â 9¿ùÀ̶ó¸é tm_year = (2000-1900), tm_mon = (9-1)À» ÀÔ·ÂÇØ¾ß ÇÑ´Ù.

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#include <time.h> 
 
#include <stdio.h> 
#include <unistd.h> 
#include <sys/types.h> 
 
int main() 
{ 
    struct tm tm_ptr; 
    time_t the_time; 
    int i; 
 
    // 2002³â 2¿ù 8ÀÏ 23½Ã 50ºÐ 50ÃÊ ¿¡ ´ëÇÑ 
    // Unix Time ¸¦ µÇµ¹·ÁÁØ´Ù. 
    tm_ptr.tm_year = 102;  // 2002 - 1900 
    tm_ptr.tm_mon  = 1;    // 2 - 1 
    tm_ptr.tm_mday = 8; 
    tm_ptr.tm_hour = 23; 
    tm_ptr.tm_min  = 50; 
    tm_ptr.tm_sec  = 50; 
 
    printf("%d\n", mktime(&tm_ptr)); 
} 
 

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