char* ch;
liv_s = ui->linet_ip->text();
QString pinip= "ping “+liv_s+ " -c 3”;
qDebug()<<pinip;
QByteArray ba = pinip.toLatin1();
ch=ba.data();
int ret=system(ch);
qDebug()<<ret;
if(ret!=0)
{
ui->label->setText(tr(“网络断开!!”));
}
else
{
ui->label->setText(tr(“网络已连接!!”));
}