arm linux 时间获取,菜鸟自学ARM：linux下编程获取系统时间和设置时间

获取时间有几种编程方法：

1

#include #include 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 #include #include

int main()

{

time_t p;

char s[30];

time(&p);

strcpy(s,ctime(&p)) ;

printf("%s\n",s);

}

3

#include #include #include

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 #include #include #include 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");

}