Just code

dynamic_cast可以将子类指针转换为父类指针？ #include using namespace std; class A{virtual void func(){};}; class B:public A{}; class C:public B{}; class D:public B{}; int main() { A *pa = new B; //父类指针指向子类

为了验证虚函数表的存在： //证明虚函数表的存在 #include #include using namespace std; class A { public : virtual void show(){cout << "function of class A!"<< endl;}; }; class B { public: virtual void show(){cout <<