animalclasscast.cpp

来自「C++ sample code, for the book: C++ blac」· C++ 代码 · 共 34 行

#include <iostream>
using namespace std;

class animal 
{                     
public:
    void eat();
    void sleep();
    virtual void breathe(); 
};

class fish : public animal 
{
public:
    void breathe();
    void swim();
} bigfish;

void animal::breathe(){cout << "Breathing..." << endl;}
void animal::eat(){cout << "Eating..." << endl;}
void animal::sleep(){cout << "Sleeping..." << endl;}
void fish::breathe(){cout << "Bubbling..." << endl;}
void fish::swim(){cout << "Swimming..." << endl;}

int main()
{
    animal animal_object;
    animal *pointer;

    pointer = &animal_object;       
    (dynamic_cast <fish *> (pointer))->swim();   

    return 0;
}