相关资料：

https://download.csdn.net/download/zhujianqiangqq/53195067     代码包下载

 

mainwindow.h

 1 #ifndef MAINWINDOW_H
 2 #define MAINWINDOW_H
 3 
 4 #include <QMainWindow>
 5 
 6 #include <QCoreApplication>
 7 #include <QDebug>
 8 
 9 QT_BEGIN_NAMESPACE
10 namespace Ui { class MainWindow; }
11 QT_END_NAMESPACE
12 
13 class MainWindow : public QMainWindow
14 {
15     Q_OBJECT
16 
17 public:
18     MainWindow(QWidget *parent = nullptr);
19     ~MainWindow();
20 
21 private slots:
22     void on_pushButton_clicked();
23 
24     void on_pushButton_2_clicked();
25 
26     void on_pushButton_3_clicked();
27 
28     void on_pushButton_4_clicked();
29 
30 private:
31     Ui::MainWindow *ui;
32 };
33 #endif // MAINWINDOW_H

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mainwindow.cpp

 1 #include "mainwindow.h"
 2 #include "ui_mainwindow.h"
 3 
 4 MainWindow::MainWindow(QWidget *parent)
 5     : QMainWindow(parent)
 6     , ui(new Ui::MainWindow)
 7 {
 8     ui->setupUi(this);
 9 
10     setWindowTitle(QStringLiteral("关闭进程4种方法"));
11 }
12 
13 MainWindow::~MainWindow()
14 {
15     delete ui;
16 }
17 
18 
19 void MainWindow::on_pushButton_clicked()
20 {
21     qDebug() << "ThreadProcess::exit_exe:current_pid = " << QCoreApplication::applicationPid();
22     std::string exit_cmd = "taskkill /f /PID " + std::to_string(QCoreApplication::applicationPid());
23     system(exit_cmd.c_str());
24 }
25 
26 void MainWindow::on_pushButton_2_clicked()
27 {
28     exit(0);
29 }
30 
31 void MainWindow::on_pushButton_3_clicked()
32 {
33     close();
34 }
35 
36 void MainWindow::on_pushButton_4_clicked()
37 {
38     QCoreApplication::quit();
39 }

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