C獲得當前系統時間

void printCurrentTime()
{
	time_t tt = time(NULL);//這句返回的只是一個時間cuo
	tm* t = localtime(&tt);
	printf("\n%d-%02d-%02d %02d:%02d:%02d\n",
		t->tm_year + 1900,
		t->tm_mon + 1,
		t->tm_mday,
		t->tm_hour,
		t->tm_min,
		t->tm_sec);
}