实验四

1.car

#ifndef BATTERY_H
#define BATTERY_H
class Battery
{
public:
    Battery(int batterySize0= 70);
    int showbattery();
    int batterySize;

};
#endif
battery.h
 1 #ifndef CAR_H
 2 #define CAR_H
 3 #include <string>
 4 #include <iostream>
 5 using namespace std;
 6 class Car {
 7 public:
 8     Car(string m, string t, int y, int d = 0);
 9     friend ostream& operator<<(ostream& out, Car& a);
10     void updateOdometer(int x);
11     string maker;
12     string model;
13     int year;
14     int odometer;
15 
16 };
17 #endif
car.h
 1 #ifndef ELECTRICCAR_H
 2 #define ELECTRICCAR_H
 3 #include "battery.h"
 4 #include "car.h"
 5 class ElectricCar :public Car, public Battery {
 6 public:
 7     ElectricCar(string m, string t, int y, int d = 0, int c = 70);
 8     friend ostream& operator<<(ostream& out, ElectricCar& a);
 9 private:
10     Battery battery;
11 
12 };
13 #endif
electriccar.h
1 #include "battery.h"
2 Battery::Battery(int batterySize0) :batterySize(batterySize0)
3 {
4 };
5 int Battery::showbattery() {
6     return batterySize;
7 }
battery.cpp
 1 #include <iostream>
 2 using namespace std;
 3 #include <string>
 4 #include "car.h"
 5 Car::Car(string m, string t, int y, int d) :maker(m), model(t), year(y), odometer(d) {
 6 
 7 }
 8 ostream& operator<<(ostream& out, Car& a) {
 9     out << "maker:" << a.maker << endl
10         << "model:" << a.model << endl
11         << "year:" << a.year << endl
12         << "odometer:" << a.odometer << endl;
13     return out;
14 }
15 void Car::updateOdometer(int x) {
16     if (x < odometer)
17         cout << "please try again!" << endl;
18     else
19         odometer = x;
20 
21 }
car.cpp
 1 #include "battery.h"
 2 #include <iostream>
 3 using namespace std;
 4 ElectricCar::ElectricCar(string m, string t, int y, int d, int c) :Car(m, t, y, d), Battery(c) {
 5 
 6 }
 7 ostream& operator<<(ostream& out, ElectricCar& a) {
 8     out << "maker:" << a.maker << endl
 9         << "model:" << a.model << endl
10         << "year:" << a.year << endl
11         << "odometer:" << a.odometer << endl
12         << "batterysize:" << a.batterySize << "-kwh" << endl;
13     return out;
14 }
elecrtriccar.cpp
 1 #include <iostream>
 2 using namespace std;
 3 
 4 #include "car.h"
 5 #include "electriCcar.h" 
 6 
 7 int main() {
 8     // 测试Car类 
 9     Car oldcar("Audi","a4",2016);
10     cout << "--------oldcar's info--------" << endl;
11     oldcar.updateOdometer(25000);
12     cout << oldcar << endl;
13 
14     // 测试ElectricCar类 
15     ElectricCar newcar("Tesla","model s",2016);
16     newcar.updateOdometer(2500);
17     cout << "\n--------newcar's info--------\n"; 
18     cout << newcar << endl;
19 
20     system("pause");
21     
22     return 0;
23 }
main.cpp

 

2.Array

 1 #include <iostream>
 2 using namespace std;
 3 
 4 #include "arrayInt.h"
 5 
 6 int main() {
 7     // 定义动态整型数组对象a，包含2个元素，初始值为0
 8     ArrayInt a(2);
 9     a.print();
10     
11     // 定义动态整型数组对象b，包含3个元素，初始值为6
12     ArrayInt b(3, 6);
13     b.print();
14 
15     // 通过对象名和下标方式访问并修改对象元素
16     b[0] = 2;
17     cout << b[0] << endl;
18     b.print();
19 
20     system("pause");
21 
22     return 0;
23 }
main.cpp
 1 #include "arrayInt.h"
 2 #include <iostream>
 3 #include <cstdlib>
 4 using std::cout;
 5 using std::endl;
 6 
 7 ArrayInt::ArrayInt(int n, int value): size(n) {
 8     p = new int[size];
 9     
10     if (p == nullptr) {
11         cout << "fail to mallocate memory" << endl;
12         exit(0); 
13     } 
14     
15     for(int i=0; i<size; i++)
16         p[i] = value;
17 }
18 
19 ArrayInt::~ArrayInt() {
20     delete[] p;
21 }
22 
23 void ArrayInt::print() {
24     for(int i=0; i<size; i++)
25         cout << p[i] << " ";
26     cout << endl;
27 }
28 
29 // 补足:将运算符[]重载为成员函数的实现
30 // ×××
31 int& ArrayInt::operator[](int x)
32 {
33     return p[x];
34 }
arrayInt.cpp
 1 #ifndef ARRAY_INT_H
 2 #define ARRAY_INT_H
 3 
 4 class ArrayInt {
 5 public:
 6     ArrayInt(int n, int value = 0);
 7     ~ArrayInt();
 8     int& operator[](int x);// 补足:将运算符[]重载为成员函数的声明
 9         // ×××
10         void print(); 
11     private:
12         int *p;
13         int size;
14 };
15 
16 #endif
arrayInt.h

 

https://www.cnblogs.com/shenqidetao/p/10850282.html

posted @ 2019-05-19 10:32  senility  阅读(87)  评论(0)    收藏  举报