你如何确定一个时间点是否在一个时间段内?

对不起,我的英语不好。我正在编写一个有幻想约会的游戏。例如,每个月正好有30天。没关系。每一天都有24小时,就像我们的世界一样,每小时60分钟,每分钟60秒。

所以,我想确定一家商店是否开门。数据库中的值如下:从8到18打开(例如白天),从20到2打开(例如晚上),从……打开。。。白天不是问题,但清晨的时间是因为它们是第二天。

AventurienDate from, to;

int HourFrom = 18;  // shop open from
int HourTo = 8; // shop open to
bool hasopen = false;

AventurienDate now;
now.set(1025, 4, 26, 1);    // Year, month, day, hour

from.set(1025, 4, now.Day, HourFrom);
to.set(1025, 4, now.Day, HourTo);

if(from < to || from == to)
   hasopen = (from < now || from == now) && (to > now || to == now);
else {
   to.addHours(24);
   if(now.Hours >= HourFrom && now.Hours <= HourTo)
      hasopen = true;
   if(hasopen == false)
      hasopen = (from < now || from == now) && (to > now || to == now);
}
qDebug() << "now:       " << now.toStringDateTime();
qDebug() << "open from: " << from.toStringDateTime();
qDebug() << "open to:   " <<to.toStringDateTime();
qDebug() << hasopen;

        now:        "26. TRA 1025 BF, 01:00:00"
    open from:  "26. TRA 1025 BF, 18:00:00"
        open to:    "27. TRA 1025 BF, 08:00:00"
        false
        

示例中的输出应为“true”!我想不出解决办法。有人吗?