C語言中tm時間結構體

C語言中tm時間結構體

2008年08月08日 星期五 10:16 A.M.

struct tm { int tm_sec;                   /* Seconds.     [0-60] (1 leap second) */ int tm_min;                   /* Minutes.     [0-59] */ int tm_hour;                  /* Hours.       [0-23] */ int tm_mday;                  /* Day.         [1-31] */ int tm_mon;                   /* Month.       [0-11] */ int tm_year;                  /* Year - 1900. */ int tm_wday;                  /* Day of week. [0-6] */ int tm_yday;                  /* Days in year.[0-365] */ int tm_isdst;                 /* DST.         [-1/0/1]*/ //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// / #ifndef _TM_DEFINED                                                                                           / / struct tm {                                                                                                            / / int tm_sec; /* seconds after the minute - [0,59] */          / / int tm_min; /* minutes after the hour - [0,59] */               / / int tm_hour; /* hours since midnight - [0,23] */                   / / int tm_mday; /* day of the month - [1,31] */                     / / int tm_mon; /* months since January - [0,11] */                / / int tm_year; /* years since 1900 */                                        / / int tm_wday; /* days since Sunday - [0,6] */                      / /                int tm_yday; /* days since January 1 - [0,365] */               / / int tm_isdst; /* daylight savings time flag */                           / / };                                                                                                             / / #define _TM_DEFINED                                                                                        / / #endif                                                                                                                     / /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// #ifdef __USE_BSD long int tm_gmtoff;           /* Seconds east of UTC. */ __const char *tm_zone;        /* Timezone abbreviation. */ #else long int __tm_gmtoff;         /* Seconds east of UTC. */ __const char *__tm_zone;      /* Timezone abbreviation. */ #endif }; 在C語言中  有time_t tm timeval等幾種類型的時間 1.time_t爲typedef __int64 __time64_t;  2.struct timeval {        uint tv_sec;        uint tv.usec; } 具體操做函數 包含文件:<sys/time.h> <time.h>  tm *gmtime(time_t * t); time_t time(time_t *t); char *asctime(const struct tm *timeptr); char *ctime(const time_t *timer);  把tm指針轉換爲time_t time_t mktime(struct tm *timeptr); localtime和gmtime的區別在於gmtime將時間轉換爲國際標準格式，也就是相對於1970 00:00:00開始的時間戳 而localtime是相對於本地的時區的格式。 #include<stdio.h> #include<time.h> #include<sys/time.h> #include<signal.h> #include<pthread.h> void quit_t() {         printf("eixt now");         exit(-1); } int main() { /*      struct timeval vt;         gettimeofday(&vt , NULL);         while(1)         {                 printf("%u:%u\n",vt.tv_sec,vt.tv_usec);                 sleep(2);                 signal(SIGINT, quit_t);         } */         struct tm *tt;         time_t t = time(NULL);         tt = gmtime(&t);         //char *s = asctime(tt);         printf("%d-%d-%d %d:%d:%d",tt->tm_year+1900,tt->tm_mon+1,tt->tm_mday,tt->tm_hour,tt->tm_min,tt->tm_sec);         return 0; }