qt中用c++ 写一个有槽函数的 两个pushbutton控制一个值的加减 我需要.h 和.cpp文件

header file:

#ifndef MYWIDGET_H
#define MYWIDGET_H

#include <QWidget>
#include <QPushButton>

class MyWidget : public QWidget
{
    Q_OBJECT

public:
    MyWidget(QWidget *parent = nullptr);
    ~MyWidget();

private:
    int value;
    QPushButton *addButton;
    QPushButton *subButton;

private slots:
    void addValue();
    void subValue();
};

#endif // MYWIDGET_H

cpp file:

#include "mywidget.h"

MyWidget::MyWidget(QWidget *parent)
    : QWidget(parent)
{
    value = 0;
    addButton = new QPushButton("+", this);
    subButton = new QPushButton("-", this);
    connect(addButton, &QPushButton::clicked, this, &MyWidget::addValue);
    connect(subButton, &QPushButton::clicked, this, &MyWidget::subValue);
}

MyWidget::~MyWidget()
{
}

void MyWidget::addValue()
{
    ++value;
    qDebug() << "Value: " << value;
}

void MyWidget::subValue()
{
    --value;
    qDebug() << "Value: " << value;
}