setup main window

mainwindow.cpp

@@ -0,0 +1,13 @@
+#include "mainwindow.h"
+#include <QLabel>
+
+MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
+{
+  QWidget *centralWidget = new QWidget(this);
+  QLabel *label = new QLabel(centralWidget);
+  label->setText("Let's get some stuff done!");
+
+  setCentralWidget(centralWidget);
+}
+
+MainWindow::~MainWindow() {}