c++ 虚拟方法

From , 3 Years ago, written in C++, viewed 99 times.

#include <iostream>
using std::cout;
 
class Mammal {
public:
        Mammal() :
                        itsAge(1) {
                cout << "Mammal constructor...\n";
        }
        virtual ~Mammal() {
                cout << "Mammal destructor...\n";
        }
        void Move() const {
                cout << "Mammal move one step\n";
        }
        virtual void Speak() const {
                cout << "Mammal speak!\n";
        }
 
protected:
        int itsAge;
};
 
class Dog: public Mammal {
public:
        Dog() {
                cout << "Dog Constructor...\n";
        }
        virtual ~Dog() {
                cout << "Dog destructor...\n";
        }
        void WagTail() {
                cout << "Wagging Tail...\n";
        }
        void Speak() const {
                cout << "Woof!\n";
        }
        void Move() const {
                cout << "Dog moves 5 steps...\n";
        }
};
 
int main() {
        Mammal *pDog = new Dog;
        pDog->Move();
        pDog->Speak();
 
        return 0;
}
 

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c++ 虚拟方法

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