Writing C++ code for music players

To write the C++ code for music players, perform the following steps:

  1. First and foremost, open up mainwindow.h and add the following headers:
#include <QMainWindow> 
#include <QDebug> 
#include <QFileDialog> 
#include <QMediaPlayer> 
#include <QMediaMetaData> 
#include <QTime> 
  1. After that, add the player variable, which is a QMediaPlayer pointer. Then, declare the functions that we're going to define later:
private: 
   Ui::MainWindow *ui; 
   QMediaPlayer* player; public:   void stateChanged(QMediaPlayer::State state);   void positionChanged(qint64 position);
  1. Next, open up mainwindow.cpp and initialize the player variable:
MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); ...

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