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class Base

{

// 应该使用虚函数

public: ~Base()

{

}

};

class Derived : public Base

{

public:

~Derived()

{

(void)11;

}

};

void Demo()

{

Base *base = new Derived;

// 因为析构函数不是虚函数，导致delete时不会调用Derived的析构函数

delete base;

}