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#ifndef WIDGET_H#define WIDGET_H#include <QWidget>#include <QLineEdit>class Widget : public QWidget{ Q_OBJECTpublic: Widget(QWidget *parent = 0); ~Widget();public slo...

#ifndef MAINWINDOW_H#define MAINWINDOW_H#include <QMainWindow>#include <QFile>class QTextEdit;class MainWindow : public QMainWindow{ Q_OBJECTpublic: MainWindow(QWidget *p...