标签：string 继承 na int 实验 MachinePets include public
实验任务3
"battery.hpp"
1 #ifndef TEST01_BATTERY_HPP
2 #define TEST01_BATTERY_HPP
3
4 #include <iostream>
5 using namespace std;
6
7 class Battery {
8 public:
9 Battery (int cap = 70): capacity(cap) {};
10 int get_capacity() {
11 return capacity;
12 }
13 private:
14 int capacity;
15 };
16
17 #endif
"car.hpp"
1 #ifndef TEST01_CAR_HPP
2 #define TEST01_CAR_HPP
3
4 #include <iostream>
5 #include <string>
6 using namespace std;
7
8 class Car {
9 public:
10 Car (string ma, string mo, int ye, int odo = 0): maker(ma), model(mo), year(ye), odometers(odo) {};
11 void info() {
12 cout << "maker: " << maker << endl;
13 cout << "model: " << model << endl;
14 cout << "year: " << year << endl;
15 cout << "odometers: " << odometers << endl;
16 }
17 void update_odometers(int new_odo) {
18 if (new_odo >= odometers)
19 odometers = new_odo;
20 else
21 cout << "odometers updating error!" << endl;
22 }
23 protected:
24 string maker;
25 string model;
26 int year;
27 int odometers;
28 };
29
30 #endif
"electricCar.hpp"
1 #ifndef TEST01_ELECTRICCAR_HPP
2 #define TEST01_ELECTRICCAR_HPP
3
4 #include <iostream>
5 #include "battery.hpp"
6 #include "car.hpp"
7 using namespace std;
8
9 class ElectricCar: public Car {
10 public:
11 ElectricCar(string ma, string mo, int ye, int odo = 0);
12 void info();
13 private:
14 Battery battery;
15 };
16
17 ElectricCar::ElectricCar(string ma, string mo, int ye, int odo): Car(ma, mo, ye), battery() {};
18
19 void ElectricCar::info() {
20 cout << "maker: " << maker << endl;
21 cout << "model: " << model << endl;
22 cout << "year: " << year << endl;
23 cout << "odometers: " << odometers << endl;
24 cout << "capacity: " << battery.get_capacity() << endl;
25 }
26
27 #endif
"task3.cpp"
1 #include <iostream>
2 #include "electricCar.hpp"
3
4 int main() {
5 using namespace std;
6
7 //test class of Car
8 Car oldcar("Cadillac", "CT5", 2021);
9 cout << "--------oldcar's info--------" << endl;
10 oldcar.update_odometers(21000);
11 oldcar.info();
12
13 cout << endl;
14
15 //test class of ElectricCar
16 ElectricCar newcar("Toyota", "bZ4X", 2022);
17 newcar.update_odometers(3700);
18 cout << "\n--------newcar's info--------\n";
19 newcar.info();
20 }
运行结果
实验任务4
"pets.hpp"
1 #ifndef INC_4_PETS_HPP
2 #define INC_4_PETS_HPP
3
4 #include <iostream>
5 #include <string>
6 using namespace std;
7
8 class MachinePets {
9 public:
10 MachinePets(string nic_na);
11 string get_nickname() const;
12 virtual string talk();
13 protected:
14 string nickname;
15 };
16
17 MachinePets::MachinePets(string nic_na): nickname(nic_na) {}
18
19 string MachinePets::get_nickname() const {
20 return nickname;
21 }
22
23 string MachinePets::talk() {
24 string sound = "";
25 return sound;
26 }
27
28 class PetCats: public MachinePets {
29 public:
30 PetCats(string cats_na);
31 string talk();
32 };
33
34 PetCats::PetCats(string cats_na): MachinePets(cats_na) {}
35
36 string PetCats::talk() {
37 return "miao wu~";
38 }
39
40 class PetDogs: public MachinePets {
41 public:
42 PetDogs(string dogs_na);
43 string talk();
44 };
45
46 PetDogs::PetDogs(string dogs_na): MachinePets(dogs_na) {}
47
48 string PetDogs::talk() {
49 return "wang wang~";
50 }
51
52 #endif
"task4.cpp"
1 #include <iostream>
2 #include "pets.hpp"
3 using namespace std;
4
5 void play(MachinePets *ptr) {
6 cout << ptr->get_nickname() << " says " << ptr->talk() << endl;
7 }
8
9 int main() {
10 PetCats cat("miku");
11 PetDogs dog("da huang");
12
13 play(&cat);
14 play(&dog);
15 }
运行结果
标签：string,继承,na,int,实验,MachinePets,include,public 来源： https://www.cnblogs.com/wangJW0209/p/15599766.html
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