qt域名转ip

#include <QCoreApplication>
#include <QHostInfo>
#include <QDebug>

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    QString domain = "www.example.com";
    QHostInfo hostInfo = QHostInfo::fromName(domain);

    if (hostInfo.error() == QHostInfo::NoError) {
        qDebug() << "IP addresses for" << domain << ":";
        foreach (const QHostAddress &address, hostInfo.addresses()) {
            if (address.protocol() == QAbstractSocket::IPv4Protocol) {
                qDebug() << "  IPv4:" << address.toString();
            } else if (address.protocol() == QAbstractSocket::IPv6Protocol) {
                qDebug() << "  IPv6:" << address.toString();
            }
        }
    } else {
        qDebug() << "Error:" << hostInfo.errorString();
    }

    return a.exec();
}