子类Circle”

陈安-26020007005-261067224.py

@@ -1,3 +1,9 @@
 class Shape:
     def area(self):
         return 0
+
+class Circle(area):
+    def __init__(self, r):
+        self.r = r
+    def area(self):
+        return 3.14 * self.r * self.r