实验5

 1 #ifndef MACHINEPETS_H
 2 #define MACHINEPETS_H
 3 #include<iostream>
 4 #include<string>
 5 using namespace std;
 6 class MachinePets
 7 {
 8 public:
 9     MachinePets(const string s) :nickname(s) {}
10     virtual string talk()=0;
11     string getnickname();
12 private:
13     string nickname;
14 
15 };
16 #endif // !MACHINEPETS_H

 1 #ifndef PETDOGS_H
 2 #define PETDOGS_H
 3 #include<iostream>
 4 #include"MachinePets.h"
 5 using namespace std;
 6 #include<string>
 7 class PetDogs :public MachinePets
 8 {
 9 public:
10     PetDogs(const string s) :MachinePets(s) {}
11     string talk() { return " wang wang~"; }
12 };
13 #endif 
14 #pragma once

 1 #ifndef PETCATS_H
 2 #define PETCATS_H
 3 #include<iostream>
 4 #include"MachinePets.h"
 5 using namespace std;
 6 #include<string>
 7 class PetCats:public MachinePets
 8 {
 9 public:
10     PetCats(const string s):MachinePets(s){}
11     string talk() { return  " miao wu ~"; } 
12 };
13 #endif

1 #include"MachinePets.h"
2 #include<iostream>
3 #include<string>
4 using namespace std;
5 string MachinePets::getnickname()
6 {
7     return nickname;
8 }

 1 #include"MachinePets.h"
 2 #include"PetCats.h"
 3 #include"PetDogs.h"
 4 #include<iostream>
 5 #include<string>
 6 void play(MachinePets *t)
 7 {
 8     cout<<t->getnickname()<<" says"<<t->talk() << endl;
 9 }
10 using namespace std;
11 int main()
12 {
13         PetCats cat("miku");
14         PetDogs dog("da huang"); 
15         play(&cat); // 按照play()形参，传递参数
16         play(&dog); // 按照play()形参，传递参数
17         return 0;
18 }