虚函数与纯虚函数请参考：http://blog.csdn.net/hackbuteer1/article/details/7558868
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#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<<"========================"<<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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