菜鸟自学ARM：linux下编程获取系统时间和设置时间

转：http://hi.baidu.com/guan9527/blog/item/2831c5ec1632eadcb31cb1b5.html

菜鸟自学ARM：linux下编程获取系统时间和设置时间
2009-04-09 21:51

获取时间有几种编程方法： 1 #include <stdio.h> #include <time.h> main(){ time_t t; struct tm *p; time(&t); p=gmtime(&t); printf("Year :%d\n",1900+p->tm_year); printf("Month :%d\n",1+p->tm_mon); printf("Day :%d\n",p->tm_mday); printf("Hour :%d\n",p->tm_hour); printf("Minute:%d\n",p->tm_min); printf("Second:%d\n",p->tm_sec); printf("Weekday:%d\n",p->tm_wday); printf("Days :%d\n",p->tm_yday); printf("Isdst :%d\n",p->tm_isdst); } 2 #include <stdio.h> #include <time.h> #include <stdlib.h> int main() { time_t p; char s[30]; time(&p); strcpy(s,ctime(&p)) ; printf("%s\n",s); } 3 #include <stdio.h> #include <time.h> #include <stdlib.h> int main() { time_t p; char s[30]; struct gm *q; time(&p); q=gmtime(&p); strcpy(s,asctime(q)) ; printf("%s\n",s); } 设置时间： #include <stdio.h> #include <sys/time.h> #include <unistd.h> #include <time.h> main() { time_t t; struct tm *p; int i; struct timeval tv; struct timezone tz; tz.tz_minuteswest=0; tz.tz_dsttime=0; time(&p); p=gmtime(&t); printf("Change your time:\n"); printf("Year:\n"); scanf("%d",&i); (*p).tm_year=i-1900; printf("Month:\n"); scanf("%d",&i); (*p).tm_mon=i-1; printf("Date:\n"); scanf("%d",&i); (*p).tm_mday=i; printf("Hour:\n"); scanf("%d",&i); (*p).tm_hour=i; printf("Minute:\n"); scanf("%d",&i); (*p).tm_min=i; printf("Second:\n"); scanf("%d",&i); (*p).tm_sec=i; t=mktime(p); tv.tv_sec=t; tv.tv_usec=0; settimeofday (&tv , &tz); printf("Done!\n"); }