//获取今天00:00:00的UNIX时间值
time_t cur_time;
cur_time = time(NULL); //
struct tm *time_tm;
time_tm = localtime(&cur_time);
time_tm->tm_hour=0;
time_tm->tm_min=0;
time_tm->tm_sec=0;
//printf("%d\n",(unsigned int)mktime(time_tm));
uint32_t today_begin = mktime(time_tm);
time_t cur_time;
cur_time = time(NULL); //
struct tm *time_tm;
time_tm = localtime(&cur_time);
time_tm->tm_hour=0;
time_tm->tm_min=0;
time_tm->tm_sec=0;
//printf("%d\n",(unsigned int)mktime(time_tm));
uint32_t today_begin = mktime(time_tm);