animalclassabstractclass.cpp

C++ sample code, for the book: C++ black book, including templates, exceptional handling.

#include <iostream>
using namespace std;

class animal 
{                         
public:
    void eat();
    void sleep();
    virtual void breathe() = 0;    // Pure virtual function
};

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

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

int main()
{
    fish bigfish;

    bigfish.breathe();
    return 0; 
}