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                ### 軟件設計原則 * OCP(開閉原則):對擴展開放,對修改關閉; * LSP(里氏代換原則):凡是基類能使用的地方,子類也一定能使用; * DIP(依賴倒轉原則):要依賴于抽象,不要依賴于具體; * ISP(接口隔離):接口盡量單一,只代表一個角色; * CARP(合成/聚合復用):盡量使用合成/聚合復用,盡量不要使用繼承; * LOD(迪米特原則):一個對象應當對其它對象的細節有盡可能少的了解;
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