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class Base { protected: Base(){} ~Base(){} public: virtual void print() { cout<<"Base::print()!"<<endl; } }; class Derived:public Base { public: Derived(){} ~Derived(){} private: void print() { cout<<"Derived::print()!"<<endl; } }; int main(int argc,char*argv[]) { Derived d; Base *pB = &d; pB->print(); return 0; } 问题补充: 结果输出的是 Derived::print()! visual studio 2008测试 问题是如果derived类以拷贝构造函数给base那么pB是指向derived 问题是在类外怎么能访问私有成员函数呢? |
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