要创建constructor和destructor函数，则需要声明两个函数，然后对这两个函数应用constructor和destructor函数属性。
To create your constructor and destructor, declare two functions, then apply the constructor and destructor function attributes to them.
要创建constructor和destructor函数，则需要声明两个函数，然后对这两个函数应用constructor和destructor函数属性。
To create your constructor and destructor, declare two functions, then apply the constructor and destructor function attributes to them.
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