使用qt写一段 可以设置windows系统ip地址，网关，DNS的代码

好的，以下是一个简单的C++例子，使用QT库向本地路由器的DHCP服务器申请IP地址，并获取网关、子网掩码和DNS： ```c++ #include <QCoreApplication> #include <QNetworkInterface> #include <QNetworkAddressEntry> #include <QProcess> int main(int argc, char *argv[]) { QCoreApplication a(argc, argv); // 获取本地网络接口列表 QList<QNetworkInterface> interfaces = QNetworkInterface::allInterfaces(); // 遍历接口列表，找到第一个支持DHCP的接口 QNetworkInterface dhcpInterface; foreach (QNetworkInterface iface, interfaces) { if (iface.flags().testFlag(QNetworkInterface::IsUp) && iface.flags().testFlag(QNetworkInterface::IsRunning) && !iface.flags().testFlag(QNetworkInterface::IsLoopBack)) { QList<QNetworkAddressEntry> entries = iface.addressEntries(); foreach (QNetworkAddressEntry entry, entries) { if (entry.dhcp()) { dhcpInterface = iface; break; } } } } // 如果找到支持DHCP的接口，执行dhclient命令来获取IP地址、网关、子网掩码和DNS if (!dhcpInterface.isNull()) { QString interfaceName = dhcpInterface.name(); QProcess process; process.start("dhclient " + interfaceName); if (process.waitForFinished()) { QString output = process.readAllStandardOutput(); QStringList lines = output.split("\n"); QString ipAddress, gateway, netmask, dns; foreach (QString line, lines) { if (line.contains("bound to")) { ipAddress = line.section(" ", 2).trimmed(); } else if (line.contains("routers")) { gateway = line.section(" ", 2).trimmed(); } else if (line.contains("subnet mask")) { netmask = line.section(" ", 2).trimmed(); } else if (line.contains("domain-name-servers")) { dns = line.section(" ", 2).trimmed(); } } // 输出获取到的IP地址、网关、子网掩码和DNS qDebug() << "IP address: " << ipAddress; qDebug() << "Gateway: " << gateway; qDebug() << "Netmask: " << netmask; qDebug() << "DNS: " << dns; } } return a.exec(); } ``` 请注意，这个例子只能在Linux系统上运行，并且需要root权限才能执行dhclient命令。