定时关机

#include "mainwindow.h"

#include "ui_mainwindow.h"

#include <QTimer>

#include <stdlib.h>

#include <QByteArray>

MainWindow::MainWindow(QWidget *parent) :

    QMainWindow(parent),

    ui(new Ui::MainWindow)

{

    ui->setupUi(this);

    //定时器       

    system("shutdown -s -t 7200");  //自动关机   shutdown -a  取消关机

    //The QTimer class provides repetitive and single-shot timers. More...

    QTimer *timer = new QTimer(this);

          connect(timer, SIGNAL(timeout()), this, SLOT(close()));

          timer->start(5*1000);

   QString conmmoned="ls";

   //int second=3600*ui->lineEdit->text();

  // conmmoned=conmmoned+" "+QString::number(second);

   //启动系统服务

   system(conmmoned.toLatin1().data());

}

MainWindow::~MainWindow()

{

    delete ui;

}

来源：https://www.cnblogs.com/countryboy666/p/11067631.html