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| #include<iostream>
using namespace std;
class Animal
{
private:
int itsage;
public:
Animal(int);
virtual ~Animal(){cout<<"析构动物"<<endl;}
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;
};
Animal::Animal(int age):itsage(age)
{
cout<<"创建动物.."<<endl;
}
class Mammalia:public Animal
{
public:
Mammalia(int age):Animal(age){cout<<"创建哺乳类.."<<endl;}
virtual ~Mammalia(){cout<<"析构哺乳类.."<<endl;}
virtual void Propagate(){cout<<"哺乳类是胎生动物，通过胚胎来繁殖后代。"<<endl;}
};
class Bird:public Animal
{
public:
Bird(int age):Animal(age){cout<<"创建鸟类.."<<endl;}
virtual ~Bird(){cout<<"析构鸟类.."<<endl;}
virtual void Sleep(){cout<<"鸟类喜欢站着睡觉。"<<endl;}
virtual void Eat(){cout<<"极个别鸟类喜欢吃肉，其他都吃素。"<<endl;}
virtual void Propagate(){cout<<"鸟类是卵生动物，通过排卵来繁殖后代。"<<endl;}
virtual void Move(){cout<<"鸟类可以飞。"<<endl;}
virtual void Body(){cout<<"鸟类体表被覆羽毛，前肢变为翼。"<<endl;}
virtual void Show(){cout<<"鸟类的一般寿命为："<<GetAge()<<endl;}
};
class Human:public Mammalia
{
public:
Human(int age):Mammalia(age){cout<<"创建人类.."<<endl;}
virtual ~Human(){cout<<"析构人类.."<<endl;}
virtual void Sleep(){cout<<"人类要在床上睡觉。"<<endl;}
virtual void Eat(){cout<<"大多数人不吃生食。"<<endl;}
virtual void Propagate(){cout<<"人类通过胚胎繁殖后代。"<<endl;}
virtual void Move(){cout<<"人类靠两条腿走路。"<<endl;}
virtual void Body(){cout<<"人类体表无毛。"<<endl;}
virtual void Show(){cout<<"人类的一般寿命为："<<GetAge()<<endl;}
};
class Pig:public Mammalia
{
public:
Pig(int age):Mammalia(age){cout<<"创建猪类.."<<endl;}
virtual ~Pig(){cout<<"析构猪类.."<<endl;}
virtual void Sleep(){cout<<"猪喜欢在烂泥里睡觉。"<<endl;}
virtual void Eat(){cout<<"猪是杂食类动物。"<<endl;}
virtual void Propagate(){cout<<"猪也通过胚胎繁殖后代。"<<endl;}
virtual void Move(){cout<<"猪靠四条腿走路。"<<endl;}
virtual void Body(){cout<<"猪体表有毛。"<<endl;}
virtual void Show(){cout<<"猪因为要被人宰了吃，所以一般寿命为："<<GetAge()<<endl;}
};
int main()
{
Animal *p=0;
int choice;
bool quit=false;
while(choice<4)
{
cout<<"(1)猪类(2)人类(3)鸟类(0)退出";
cin>>choice;
switch(choice)
{
case 0:quit=true;
break;
case 1:p=new Pig(1);
break;
case 2:p=new Human(80);
break;
case 3:p=new Bird(50);
break;
default:cout<<"请输入0到3之间的数字";
break;
}
if(quit)
{
break;
}
p->Show();
p->Eat();
p->Propagate();
p->Move();
p->Sleep();
p->Body();
cout<<endl;
delete p;
}
return 0;
}
|