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Author	SHA1	Message	Date
xhn567	9ef3af4523	完成主程序部分	2026-10-05 18:42:51 +08:00
xhn567	e75afbf52d	创建Circle和Square子类并且重写area方法	2026-10-05 18:26:47 +08:00
xhn567	7abc66d0e9	创建基类Shape	2026-10-05 18:20:06 +08:00
xhn567	58c2853773	first commit	2026-10-05 18:15:11 +08:00