accessing a class member from another class in c++ - c++

Question

I am trying to access the member of a class declared in another class as an attribute.
The project class has a workArea that is also a class defined in the project.h.
I instanciate a project in the main, and then I send it to the mainWindow through its constructor. Once in the mainWindow constructor I try to access project->lat that works fine, but project->workArea->latInf crashes.
Any help will be highly appreciated.
project.h
#ifndef PROJECT_H
#define PROJECT_H
#include <QObject>
class WorkArea{
public://attributes
int latInf = 30;
public://methods
WorkArea()//Default constructor
{
}
~WorkArea();
};
class Project : public QObject
{
Q_OBJECT
public: //attributes
int lat = 20;
WorkArea* workArea;
public: //methods
explicit Project(QObject *parent = nullptr);
signals:
public slots:
};
#endif // PROJECT_H
main.cpp
#include "ui/mainwindow.h"
#include <QApplication>
#include "project.h"
int main(int argc, char *argv[])
{
Project* pj;
QApplication app(argc, argv);
MainWindow w( 0 , pj);
w.show();
return app.exec();
}
mainWindow.cpp
#include "mainwindow.h"
#include "ui_mainwindow.h"
MainWindow::MainWindow(QWidget *parent, Project *project) :
QMainWindow(parent),
ui(new Ui::MainWindow)
{
ui->setupUi(this);
try
{
qDebug() << "Project latInf" << project->lat << "\n"; // works fine
qDebug()<< "Project lowLeft: " << project->workArea->latInf << "\n" ; // crashes
}
catch(std::exception &ex)
{
qDebug() << ex.what() ;
}
catch (...)
{
}
}

Answer 1

That was it. Thanks #eyllanesc. I forgot to create workArea. I though just instanciting it as an attribute in Project was fine, but I had to fill that memory space in the constructor of project.
project.h
#ifndef PROJECT_H
#define PROJECT_H
#include <QObject>
class WorkArea{
public://attributes
int latInf = 30;
public://methods
WorkArea()//Default constructor
{
}
~WorkArea();
};
class Project : public QObject
{
Q_OBJECT
public: //attributes
int lat = 20;
WorkArea* workArea;
public: //methods
explicit Project(QObject *parent = nullptr){
workArea = new WorkArea;
}
signals:
public slots:
};
#endif // PROJECT_H