c++ 11 获取当前天0点的timestamp

2015-12-11
弄了半天才搞定。。光靠baidu是不靠谱的</p> 
struct tm *p;
timestamp += 7 * 60 * 60;

p = localtime(&timestamp);
//LOG_INFO << "date:" << p->tm_mday << " " << p->tm_hour << ":" << p->tm_min << ":" << p->tm_sec;
p->tm_hour = ;
p->tm_min = ;
p->tm_sec = ;

uint32_t num = mktime(p);
num -= 7 * 60 * 60;