Examples of C + + abstract class and pure virtual function combat

virtual function and pure virtual function please refer to: http://blog.csdn.net/hackbuteer1/article/details/7558868

#include  <iostream>using namespace std;class Animal{public:     Virtual void eat () =0;    virtual void sleep () = 0;}; Class cat:public animal{public:    void eat ()     {         cout<< "The cat is eating now." <<endl;    }    void sleep ()     {         cout<< "The cat is sleeping now." <<endl;    }};class bear:public animal{public:    void  eat ()     {        cout<< "The bear  is eating now. " <<endl;    }    void sleep ()     {         cout<< "The bear is sleeping now." <<endl;    }};class Panda:public Cat,public Bear{public:     void eat ()     {        cout< < "The panda is eating now." <<endl;    }    void sleep ()     {         cout<< "The panda is sleeping now." <<endl;    }};void show (cat *p) {    cout<< "===== =================== "<<endl;    p->eat ();     p->sleep ();     cout<< "========================" &LT;&LT;ENDL;} Int main (int argc, char *argv[]) {    cat *p;     Cat c;    Panda d;    p=&c;    show (p);     p=&d ;     show (P);     return 0;}

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Examples of C + + abstract class and pure virtual function combat