实验四

最新推荐文章于 2024-02-19 13:03:53 发布

转载最新推荐文章于 2024-02-19 13:03:53 发布 · 93 阅读

0 ·

CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/sqcmxg/p/10862028.html

第一题：

车辆重载：

 1 #ifndef BATTERY_H
 2 #define BATTERY_H
 3 
 4 class Battery{
 5     public:
 6         Battery(int size=70);
 7         int getsize()const;
 8     private:
 9         int batterySize;
10 };
11 #endif

battery.h

1 #include"battery.h"
2 
3 Battery::Battery(int size):batterySize(size){
4 }
5 
6 int Battery::getsize()const{
7     return batterySize;
8 }

battery.cpp

 1 #include<iostream>
 2 #include<string>
 3 using namespace std;
 4 
 5 #ifndef CAR_H
 6 #define CAR_H
 7 
 8 class Car{
 9     public:
10         Car(string maker,string model,int year,int odometer=0);
11         friend ostream&operator<<(ostream &out,const Car &b);
12         void updateOdometer(int new1);
13         string maker,model;
14         int year,odometer;
15 };
16 
17 #endif

car.h

 1 #include "car.h"
 2 #include<iostream>
 3 #include<string>
 4 using namespace std;
 5 
 6 Car::Car(string maker,string model,int year,int odometer):maker(maker),model(model),year(year),odometer(odometer){
 7 }
 8 
 9 ostream&operator<<(ostream &out,const Car &b){
10     out<<"maker: "<<b.maker<<"  model: "<<b.model
11         <<"  year: "<<b.year<<"  odometer: "<<b.odometer<<endl;
12         return out;  
13 }
14 
15 void Car::updateOdometer(int new1){
16     if(new1<odometer)
17     cout<<"wrong!"<<endl;
18     else
19     odometer=new1;
20 }

car.cpp

 1 #ifndef ELEC_H
 2 #define ELEC_H
 3 
 4 #include<iostream>
 5 #include<string>
 6 #include"car.h"
 7 #include"battery.h"
 8 using namespace std;
 9 
10 class ElectricCar:virtual public Car{
11     public:
12         ElectricCar(string maker,string model,int year,int odometer=0,Battery battery=70);
13         friend ostream&operator<<(ostream &out,const ElectricCar &c);
14     
15     private:
16         Battery battery;
17 
18 };
19 
20 #endif

electriccar.h

 1 #include"electriccar.h" 
 2 #include<iostream>
 3 #include<string>
 4 #include"battery.h"
 5 using namespace std;
 6 
 7 ElectricCar::ElectricCar(string maker,string model,int year,int odometer,Battery battery):Car(maker,model,year,odometer){    
 8     battery=battery;
 9 }    
10 
11 ostream&operator<<(ostream &out,const ElectricCar &c){
12     out<<"maker: "<<c.maker<<"  model: "<<c.model
13         <<"  year: "<<c.year<<"  odometer: "<<c.odometer<<"  battery: "<<c.battery.getsize()<<endl;
14         return out;
15 }

eletriccar.cpp

 1 #include <iostream>
 2 using namespace std;
 3 #include "car.h"
 4 #include "electricCar.h"
 5 
 6 int main() {
 7 // 测试Car类
 8 Car oldcar("Audi","a4",2016);
 9 cout << "--------oldcar's info--------" << endl;
10 oldcar.updateOdometer(25000);
11 cout << oldcar << endl;
12 // 测试ElectricCar类
13 ElectricCar newcar("Tesla","model s",2016);
14 newcar.updateOdometer(2500);
15 cout << "\n--------newcar's info--------\n";
16 cout << newcar << endl;
17 
18 return 0;
19 }

main.cpp

第二题：

 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 num);
 9     // 补足:将运算符[]重载为成员函数的声明
10     // ×××
11     void print();
12 private:
13     int *p;
14     int size;
15 };
16 
17 #endif

arrayInt.h

 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 
32 int& ArrayInt::operator[](int num) {
33     return p[num];
34 }

arrayInt.cpp

 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 }