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分享#include <algorithm>
#include <iostream>
#include <iostream>
using namespace std;
class animal
{
public:
virtual void eat()
{
cout <<"animal eat" <<endl;
}
virtual void breathe()
{
cout <<"animal breath" <<endl;
}
};
class fish :public animal
{
public:
void eat()
{
cout <<"fish eat" <<endl;
}
void breathe()
{
cout <<"fish breathe" <<endl;
}
};
void fn(animal*pa)
{
pa->breathe();
pa->eat();
}
void main()
{
animal *pan;
fish fh;
pan=&fh;
fn(pan);
}