#include <iostream>
using namespace std;
class Animal
{
public:
Animal ( int );
virtual ~Animal() {cout<<"析构动物...\n";}
virtual int GetAge() {return itsage;}
virtual void Sleep() =0;
virtual void Propagate() =0;
virtual void Move() =0;
virtual void Body() =0;
virtual void Eat() =0;
virtual void Show() =0;
private:
int itsage;
};
Animal::Animal ( int age ) :itsage ( age )
{
cout<<"创建动物...\n";
}
class Mammalia:public Animal
{
public:
Mammalia ( int age ) :Animal ( age )
{
cout<<"创建哺乳类...\n";
}
virtual ~Mammalia()
{
cout<<"析构哺乳类...\n";
}
virtual void Propagate()
{
cout<<"哺乳类是胎生动物，通过胚胎来繁殖后代。\n";
}
};
class Bird:public Animal
{
public:
Bird ( int age ) :Animal ( age )
{
cout<<"创建鸟类...\n";
}
virtual ~Bird()
{
cout<<"析构鸟类...\n";
}
virtual void Sleep()
{
cout<<"鸟类喜欢站着睡觉。\n";
}
virtual void Eat()
{
cout<<"极个别鸟类吃肉，其他都是吃素。\n";
}
virtual void Propagate()
{
cout<<"鸟类是卵生动物，通过排卵来繁殖后代。\n";
}
virtual void Move()
{
cout<<"鸟类可以飞...\n";
}
virtual void Body()
{
cout<<"鸟类体表被覆羽毛，前肢变为翼！\n";
}
virtual void Show()
{
cout<<"鸟类的一般寿命为："<<GetAge() <<"年"<<endl;
}
};
class Human:public Mammalia
{
public:
Human ( int age ) :Mammalia ( age )
{
cout<<"创建人类...\n";
}
virtual ~Human()
{
cout<<"析构人类...\n";
}
virtual void Sleep()
{
cout<<"人类要在床上睡觉。\n";
}
virtual void Eat()
{
cout<<"大多数人不吃生食。\n";
}
virtual void Propagate()
{
cout<<"人类通过胚胎繁殖后代。\n";
}
virtual void Move()
{
cout<<"人类靠两条腿走路...\n";
}
virtual void Body()
{
cout<<"人类体表无毛！\n";
}
virtual void Show()
{
cout<<"人类的一般寿命为："<<GetAge() <<"年"<<endl;
}
};
class Pig:public Mammalia
{
public:
Pig ( int age ) :Mammalia ( age )
{
cout<<"创建猪类...\n";
}
virtual ~Pig()
{
cout<<"析构猪类...\n";
}
virtual void Sleep()
{
cout<<"猪喜欢在烂泥里睡觉。\n";
}
virtual void Eat()
{
cout<<"猪是杂食类动物。\n";
}
virtual void Propagate()
{
cout<<"猪也通过胚胎繁殖后代。\n";
}
virtual void Move()
{
cout<<"猪靠四条腿走路...\n";
}
virtual void Body()
{
cout<<"猪体表被毛！\n";
}
virtual void Show()
{
cout<<"猪因为要被人宰了吃，所以一般寿命为："<<GetAge() <<"年"<<endl;
}
};
int main()
{
Animal*p=0;
int choice=0;
bool quit=false;
while ( 1 )
{
cout<<"(1)猪类(2)人类(3)鸟类(0)退出";
cin>>choice;
switch ( choice )
{
case 1:
p=new Pig ( 1 );
break;
case 2:
p=new Human ( 80 );
break;
case 3:
p=new Bird ( 50 );
break;
default:
quit=true;
break;
}
if ( quit )
{
break;
}
p->Show();
p->Eat();
p->Propagate();
p->Move();
p->Sleep();
p->Body();
cout<<"\n";
delete p;
}
return 0;
}