diff --git a/mainwindow.cpp b/mainwindow.cpp
index 9db2498..0027163 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -314,3 +314,18 @@ void MainWindow::on_next_btn_clicked()
 {
     player_rewind_or_forward(10); // 快退 10 秒
 }
+
+void MainWindow::on_mute_btn_clicked()
+{
+
+}
+
+void MainWindow::on_volume_down_btn_clicked()
+{
+
+}
+
+void MainWindow::on_volume_up_btn_clicked()
+{
+
+}
diff --git a/mainwindow.h b/mainwindow.h
index 40fafc7..efebef3 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -47,7 +47,7 @@ public:
 public slots:
     void playNextSong(); // 切换歌曲槽函数I
     void playLastSong();
-    void player_rewind_or_forward(int seconds)； // 快进快退函数
+    void player_rewind_or_forward(int seconds); // 快进快退函数
     void setCurrentTimeLabel(int time); // 设置当前时间标签槽函数
     void setCurrentSlider(int currentProgress); // 设置当前进度条
 
@@ -62,6 +62,16 @@ private slots:
 
     void on_front_btn_clicked();
 
+    void on_last_btn_clicked();
+
+    void on_next_btn_clicked();
+
+    void on_mute_btn_clicked();
+
+    void on_volume_down_btn_clicked();
+
+    void on_volume_up_btn_clicked();
+
 private:
     Ui::MainWindow *ui;
 };