identifier and initializer errors in extracted example code

[agmar]

Hi,
I keep getting this error on my code, but the same lines do not give an error in the terminal example...
I have checked the other files for missed includes and the like, but I am at a dead end, whats the problem?

my code^

code in the terminal example^

[JonB]

@agmar
Show your mainwindow.h file, preferably as text rather than screenshot, indication where m_serial member is declared.

[agmar]

@JonB here it is #ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QApplication>
#include <QLabel>
#include <QScrollArea>
#include <QVBoxLayout>
#include <QWidget>
#include <QtSerialPort/QSerialPortInfo>
#include <QtSerialPort>
#include <QLineEdit>
#include <QByteArray>

#include <iostream>

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
Q_OBJECT

signals:
void getData(const QByteArray &data);

public:
MainWindow(QWidget *parent = nullptr);
~MainWindow();
void putData(const QByteArray &data);

private slots:
void sendMessage();
void inputGet();
void receiveMessage();
void readData();
void on_horizontalSlider_sliderReleased();

private:
Ui::MainWindow *ui;
QLabel *label;

};
#endif // MAINWINDOW_H
I know there is nothing here related to m_serial, but the terminal example has nothing as well...

[JonB]

@agmar
So like I said, standard C++, you need to declare the member variable you are trying to use....

I cannot say about whatever example you have used since you do not give any link....

[agmar]

@JonB thank you, i just missed the line in the terminal example... its the example available in the welcome page :-) just type out "terminal" in the search bar