CIDR地址表示法: 假如我们的服务器IP列表为:172.18.0.157~172.18.0.163,该如何表示呢?
A. 172.18.0.157/163 B. 172.18.0.157/7 C. 172.18.0.157/24
D. 172.18.0.157/26 E. 172.18.0.0/26 F.1…
QPointer QPointer can only point to QObject instances. It will be automatically set to nullptr if the pointed to object is destroyed. It is a weak pointer specialized for QObject. QPointer只能指向QObject实例。如果指向的对象被销毁,它将自动设置为 …