QTcpSocket Signal-Slot Connections in C++

These lines of code create a new `QTcpSocket` object named `msocket` and establish several signal-slot connections using the `connect` function.\n\n1. The `disconnected` signal of the `msocket` object is connected to the `connect_dis` slot of the `ProtocolRequest` object. This connection is triggered when the socket is disconnected from the remote host.\n\n2. The `connected` signal of the `msocket` object is connected to the `connect_suc` slot of the `ProtocolRequest` object. This connection is triggered when the socket successfully establishes a connection with the remote host.\n\n3. The `readyRead` signal of the `msocket` object is connected to the `read_reply` slot of the `ProtocolRequest` object. This connection is triggered when there is data available for reading from the socket.\n\n4. The `timeout` signal of the `mtimer` object, which is presumably a `QTimer` object, is connected to the `auto_connect` slot of the `ProtocolRequest` object. This connection is triggered when the timer times out.