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                其實新版的Time::print并不需要這么復雜。我們并非真的需要創建局部變量來引用當前對象的實例變量。 如果函數引用hour,minute或者second時,只寫它們本身,而不寫點號,C++知道它指的是當前對象。所以我們本可以這么寫: ~~~ void Time::print() { cout << hour << ":" << minute << ":" << second <<endl; } ~~~ 這種變量訪問方式稱為“隱式變量訪問”,因為對象名沒有顯式地出現。這種特性是成員函數往往比非成員函數更簡潔的一個原因。
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