diff --git a/w4/Report.docx b/w4/Report.docx
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diff --git a/w4/视图.txt b/w4/视图.txt
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++----------------+
+|     <<abstract>>     |
+|       Shape        |
++----------------+
+|                    |
+| + getArea(): double (abstract) |
+| + display()                |
++----------------+
+          ▲
+          │
+    +-----+-----+-----+
+    |           |     |
++----------+ +----------+ +----------+
+|  Circle  | | Rectangle| | Triangle |
++----------+ +----------+ +----------+
+| -radius  | | -width   | | -sideA   |
+|          | | -height  | | -sideB   |
+| +getArea()| | +getArea()| | -sideC   |
++----------+ +----------+ | +getArea()|
+                           +----------+
\ No newline at end of file