diff --git a/W6-动物叫声系统.txt b/W6-动物叫声系统.txt
new file mode 100644
index 0000000..0055a97
--- /dev/null
+++ b/W6-动物叫声系统.txt
@@ -0,0 +1,22 @@
+public abstract class AinmalSound {
+    public abstract void makeSound();
+}
+interface Swimmable{
+    void swim();
+}
+class Cat extends AnimalSound {
+    @Override
+    public void makeSound() {
+        System.out.println("猫：喵喵喵！");
+    }
+}
+class Dog extends AnimalSound implements Swimmable {
+    @Override
+    public void makeSound() {
+        System.out.println("狗：汪汪汪！");
+    }
+    @Override
+    public void swim() {
+        System.out.println("狗：我会游泳！");
+    }
+}
\ No newline at end of file