C++經典面試題 | 帶引用計數的智能指針循環交叉引用問題

我們先來看看強智能指針shared_ptr循環引用所帶來的問題： class B; class A { public: A() { cout << "A()" << endl; } ~A() { cout << "~A()" << endl; } shared_ptr<B> _ptrb; }; class B { public: B() { cout << "B()" << endl;

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