From cd181ec54b07dfa2b43f2ab740523637162891cd Mon Sep 17 00:00:00 2001
From: MX <3037347690@qq.com>
Date: Sun, 4 Oct 2026 15:19:43 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BB=A3=E7=A0=81=E6=80=9D=E8=B7=AF?=
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---
 README.md | 3 +++
 1 file changed, 3 insertions(+)
 create mode 100644 README.md

diff --git a/README.md b/README.md
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+先定义父类Shape和方法area，并且area要return 0
+子类Circle和Square要重写area，使用其面积公式
+主程序先输入side和r，然后列表main存放两个字类，并且使用for循环逐个输出
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