include <iostream>

using namespace std;

class Animal

{
public:

 Animal(int heigh, int weight)//构造函数{

// cout <<"Animal construct"<<endl;

} ~Animal()//析构函数{

// cout <<"Animal 析构函数 ^_^ " << endl;

} void eat() {     cout <<"animal eat!" <<endl; } void sleep() {         cout <<"animal sleep!" <<endl; } void breakthe() {         cout <<"animal breakthe!" <<endl; }

};

class fish : public Animal//继承
{
public:

 fish() : Animal(400, 300), a(1)//析构函数，对a初始化{

// cout <<"fish construct"<<endl;

} ~fish() {

// cout <<"fish deconstruct"<<endl;

} void breakthe() {

// Animal :: breakthe();//拜访Animal类中的breaktne()函数

    cout << "fish bublle ^_^" << endl; }

private:

 const int a;

};

void fn(Animal *pAn)

{

 fish *fi; cout << &pAn << endl; cout << &fi << endl; fi->breakthe(); pAn->breakthe();

}
int main()

{

 Animal an(3, 5); Animal *pAn; fish fi; pAn = &fi; fn(pAn); return 0; 

}