实验五

#ifndef PETDOGS_H
#define PETDOGS_H
#include<string>
using namespace std;
#include"MachinePets.h"
class PetDogs:public MachinePets{
public:
    PetDogs(const string s);
    string talk();
};
#endif

#ifndef PETCATS_H
#define PETCATS_H
#include<string>
using namespace std;
#include"MachinePets.h"
class PetCats:public MachinePets{
public:
    PetCats(const string s);
    string talk();
};
#endif

#ifndef MACHINEPETS_H
#define MACHINEPETS_H
#include<string>
using namespace std;
class MachinePets{
private:
    string nickname;
public:
    MachinePets(const string s);
    virtual string talk()=0;
    string getNickname()const;
};
#endif

#include "MachinePets.h"
#include<string>
using namespace std;
MachinePets::MachinePets(const string s):nickname(s){
}
string MachinePets::getNickname()const{
    return nickname;
}

#include"PetCats.h"
#include<string>
using namespace std;
PetCats::PetCats(const string s):MachinePets(s){
}
string PetCats::talk(){
    return "miao wu~~";
}

#include"PetDogs.h"
#include<string>
using namespace std;
PetDogs::PetDogs(const string s):MachinePets(s){
}
string PetDogs::talk(){
    return "wang wang~~";
}

#include<iostream>
#include<string>
using namespace std;
#include"MachinePets.h"
#include"PetCats.h"
#include"PetDogs.h"
void play(MachinePets *p){
    cout<<p->getNickname()<<" says "<<p->talk()<<endl;
}

int main() {
PetCats cat("miku");
PetDogs dog("da huang");
play(&cat); // 按照play()形参，传递参数
play(&dog); // 按照play()形参，传递参数
system("pause");
return 0;
}