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與具象型別的類別相對,稱為抽象型別的類別。

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QueenieCplusplus/Cplusplus_Abstract_Types

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Cplusplus_Abstract_Types

與具象型別的類別相對,稱為抽象型別的類別。

抽象型別跟使用者的實作細節完全隔離開來,比較接近介面的概念。

   Interface >> Abstract Class >>  Concret Class >> Instance Object
   
                 >> 越往右邊,內部表述實作更具體。
                 
                 >> 越往左邊,越是需要捨棄成員變數。

由於不清楚抽象類別中內部表述的內容,所以不會知道所需要的空間大小,故需要在自由空間中配置出物件,並且透過 ref 參考或是指標 * 來 access 這些物件。

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與具象型別的類別相對,稱為抽象型別的類別。

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