实验五

task4

Pets.hpp

 1 #pragma once
 2 #include<bits/stdc++.h>
 3 using namespace std;
 4 class MachinePets
 5 {
 6 private:
 7     string nickname;
 8 public:
 9     MachinePets(const string s) :nickname(s) {}
10     MachinePets(MachinePets& m) :nickname(m.nickname) {}
11     string get_nickname() const { return nickname; }
12     virtual string talk() = 0;
13 };
14 class PetCats :public MachinePets {
15 public:
16     PetCats(const string s) : MachinePets(s) {};
17     string talk() { return "miao mu~"; }
18 };
19 class PetDogs :public MachinePets {
20 public:
21     PetDogs(const string s) : MachinePets(s) {};
22     string talk() { return "wang wang~"; }
23 };

task4.cpp

 1 #include <iostream>
 2 #include "pets.hpp"
 3 
 4 void play(MachinePets& obj) {
 5     std::cout << obj.get_nickname() << " says " << obj.talk() << std::endl;
 6 }
 7 
 8 void test() {
 9     PetCats cat("miku");
10     PetDogs dog("da huang");
11     play(cat);
12     play(dog);
13 }
14 
15 int main() {
16     test();
17 }