实验五

实验一代码：

  1 #pragma once
  2 
  3 #include <iostream>
  4 #include <string>
  5 
  6 using std::cout;
  7 using std::endl;
  8 using std::string;
  9 
 10 // 发行/出版物类：Publisher （抽象类）
 11 class Publisher {
 12 public:
 13     Publisher(const string &s = "");            // 构造函数
 14 
 15 public:
 16     virtual void publish() const = 0;                 // 纯虚函数，作为接口继承
 17     virtual void use() const = 0;                     // 纯虚函数，作为接口继承
 18 
 19 protected:
 20     string name;    // 发行/出版物名称
 21 };
 22 
 23 Publisher::Publisher(const string &s): name {s} {
 24 }
 25 
 26 
 27 // 图书类: Book
 28 class Book: public Publisher {
 29 public:
 30     Book(const string &s = "", const string &a = "");  // 构造函数
 31 
 32 public:
 33     void publish() const override;        // 接口
 34     void use() const override;            // 接口
 35 
 36 private:
 37     string author;          // 作者
 38 };
 39 
 40 Book::Book(const string &s, const string &a): Publisher{s}, author{a} {
 41 }
 42 
 43 void Book::publish() const {
 44     cout << "Publishing book: 《" << name << "》 by " << author << endl;
 45 }
 46 
 47 void Book::use() const {
 48     cout << "Reading book: " << name << " by " << author << endl;
 49 }
 50 
 51 
 52 // 电影类: Film
 53 class Film: public Publisher {
 54 public:
 55     Film(const string &s = "", const string &d = "");   // 构造函数
 56 
 57 public:
 58     void publish() const override;    // 接口
 59     void use() const override;        // 接口            
 60 
 61 private:
 62     string director;        // 导演
 63 };
 64 
 65 Film::Film(const string &s, const string &d): Publisher{s}, director{d} {
 66 }
 67 
 68 void Film::publish() const {
 69     cout << "Publishing film: <" << name << "> directed by " << director << endl;
 70 }
 71 
 72 void Film::use() const {
 73     cout << "Watching film: " << name << " directed by " << director << endl;
 74 }
 75 
 76 
 77 // 音乐类：Music
 78 class Music: public Publisher {
 79 public:
 80     Music(const string &s = "", const string &a = "");
 81 
 82 public:
 83     void publish() const override;        // 接口
 84     void use() const override;            // 接口
 85 
 86 private:
 87     string artist;      // 音乐艺术家名称
 88 };
 89 
 90 Music::Music(const string &s, const string &a): Publisher{s}, artist{a} {
 91 }
 92 
 93 void Music::publish() const {
 94     cout << "Publishing music <" << name << "> by " << artist << endl;
 95 }
 96 
 97 void Music::use() const {
 98     cout << "Listening to music: " << name << " by " << artist << endl;
 99 }
100 
101 
102 
103 
104 
105 #include "publisher.hpp"
106 #include <vector>
107 #include <typeinfo>
108 
109 using std::vector;
110 
111 void test() {
112    vector<Publisher *> v;
113 
114    v.push_back(new Book("Harry Potter", "J.K. Rowling"));
115    v.push_back(new Film("The Godfather", "Francis Ford Coppola"));
116    v.push_back(new Music("Blowing in the wind", "Bob Dylan"));
117 
118    for(auto &ptr: v) {
119         cout << "pointer type: " << typeid(ptr).name() << endl;  // 输出指针类型
120         cout << "RTTI type: " << typeid(*ptr).name() << endl;    // 输出指针指向的对象类型
121         ptr->publish();
122         ptr->use();
123         cout << endl;
124    }
125 }
126 
127 int main() {
128     test();
129 }

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实验二代码：

  1 #pragma once
  2 
  3 #include <string>
  4 #include <iostream>
  5 #include <iomanip>
  6 
  7 using std::string;
  8 using std::ostream;
  9 using std::endl;
 10 using std::setw;
 11 using std::left;
 12 
 13 class Book {
 14 public:
 15     Book(const string &name, const string &author, const string &translator, const string &isbn, float price);
 16 
 17     friend ostream& operator<<(ostream &out, const Book &book);
 18 
 19 private:
 20     string name;        // 书名
 21     string author;      // 作者
 22     string translator;  // 译者
 23     string isbn;        // isbn号
 24     float price;        // 定价
 25 };
 26 
 27 // 成员函数实现
 28 Book::Book(const string &name, const string &author, const string &translator, const string &isbn, float price) {
 29     this->name = name;
 30     this->author = author;
 31     this->translator = translator;
 32     this->isbn = isbn;
 33     this->price = price;
 34 }
 35 
 36 // 友元实现
 37 ostream& operator<<(ostream &out, const Book &book) {
 38     out << left;
 39     out << setw(15) << "书名:" << book.name << endl
 40         << setw(15) << "作者:" << book.author << endl
 41         << setw(15) << "译者:" << book.translator << endl
 42         << setw(15) << "ISBN:" << book.isbn << endl
 43         << setw(15) << "定价:" << book.price;
 44 
 45     return out;
 46 }
 47 
 48 
 49 
 50 
 51 
 52 #pragma once
 53 
 54 #include "book.hpp"
 55 #include <iostream>
 56 #include <string>
 57 #include <iomanip>
 58 
 59 using std::string;
 60 using std::cout;
 61 using std::endl;
 62 using std::setw;
 63 
 64 class BookSale {
 65 public:
 66     BookSale(const Book &b, float price, int amount);
 67     int get_amount() const;
 68     
 69     friend ostream& operator<<(ostream &out, const BookSale &item);
 70 
 71 private:
 72     Book rb;         
 73     float sales_price;      // 售价
 74     int sales_amount;       // 销售数量
 75     float revenue;          // 营收
 76 };
 77 
 78 // 成员函数实现
 79 BookSale::BookSale(const Book &b, float price, int amount): rb{b}, sales_price(price), sales_amount{amount} {  
 80     revenue = sales_amount * sales_price;
 81 }
 82 
 83 int BookSale::get_amount() const {
 84     return sales_amount;
 85 }
 86 
 87 // 友元函数实现
 88 ostream& operator<<(ostream &out, const BookSale &item) {
 89     out << left;
 90     out << item.rb << endl
 91         << setw(15) << "售价:" << item.sales_price << endl
 92         << setw(15) << "销售数量:" << item.sales_amount << endl
 93         << setw(15) << "营收:" << item.revenue;
 94 
 95     return out;
 96 }
 97 
 98 
 99 
100 
101 
102 #include "booksale.hpp"
103 #include <iostream>
104 #include <string>
105 #include <vector>
106 #include <algorithm>
107 
108 // 按图书销售数额比较
109 bool compare_by_amount(const BookSale &x1, const BookSale &x2) {
110     return x1.get_amount() > x2.get_amount();
111 }
112 
113 void test() {
114     using namespace std;
115 
116      vector<BookSale> sales_lst;         // 存放图书销售记录
117 
118      int books_number;
119     cout << "录入图书数量: ";
120     cin >> books_number;
121 
122     cout << "录入图书销售记录" << endl;
123     for(int i = 0; i < books_number; ++i) {
124         string name, author, translator, isbn;
125         float price;
126         cout << string(20, '-') << "第" << i+1 << "本图书信息录入" << string(20, '-') << endl;
127         cout << "录入书名: "; cin >> name;
128         cout << "录入作者: "; cin >> author;
129         cout << "录入译者: "; cin >> translator;
130         cout << "录入isbn: "; cin >> isbn;
131         cout << "录入定价: "; cin >> price;
132 
133         Book book(name, author, translator, isbn, price);
134 
135         float sales_price;
136         int sales_amount;
137 
138         cout << "录入售价: "; cin >> sales_price;
139         cout << "录入销售数量: "; cin >> sales_amount;
140 
141         BookSale record(book, sales_price, sales_amount);
142         sales_lst.push_back(record);
143     }
144 
145     // 按销售册数排序
146     sort(sales_lst.begin(), sales_lst.end(), compare_by_amount);
147 
148     // 按销售册数降序输出图书销售信息
149     cout << string(20, '=') <<  "图书销售统计" << string(20, '=') << endl;
150     for(auto &t: sales_lst) {
151         cout << t << endl;
152         cout << string(40, '-') << endl;
153     }
154 }
155 
156 int main() {
157     test();
158 }

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实验三代码：

 1 #include<iostream>
 2 
 3 
 4 using namespace std;
 5 
 6 
 7 
 8 class MachinePets{
 9     public:
10         MachinePets(const string s):nickname(s){}
11         string get_nickname() const{
12             return nickname;
13         }
14         virtual string talk()=0;
15     private:
16         string nickname;
17 };
18 
19 
20 class PetCats: public MachinePets{
21     public:
22         PetCats(const string s):MachinePets(s){}
23         string talk(){
24             return "miao wu~";
25         }
26 };
27 
28 
29 
30 class PetDogs: public MachinePets{
31     public:
32         PetDogs(const string s):MachinePets(s){}
33         string talk(){
34             return "wang wang~";
35         }
36 };
37 
38 
39 
40 
41 #include <iostream>
42 #include <vector>
43 #include "pets.hpp"
44 
45 void test() {
46     using namespace std;
47 
48     vector<MachinePets *> pets;
49 
50     pets.push_back(new PetCats("miku"));
51     pets.push_back(new PetDogs("da huang"));
52 
53     for(auto &ptr: pets)
54         cout <<ptr->get_nickname() << " says " << ptr->talk() << endl;
55 }
56 
57 int main() {
58     test();
59 }

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实验四代码：

 1 #pragma once
 2 #include<iostream>
 3 #include<iomanip>
 4 using namespace std;
 5 
 6 
 7 class Film{
 8     public:
 9         Film(const string &name="",const string &director="",const string &nation="",const int year=0);
10         friend ostream& operator<<(ostream &out,const Film &f);
11         friend istream& operator>>(istream &in,Film &f);
12         int get_year() const;
13     private:
14         string Name,Director,Nation;
15         int Year;
16 };
17 Film::Film(const string &name,const string &director,const string &nation,const int year){
18     Name=name;
19     Year=year;
20     Director=director;
21     Nation=nation;
22 }
23 ostream& operator<<(ostream &out,const Film &f){
24             out<<left;
25             out<<setw(10)<<f.Name<<
26             setw(10)<<f.Director<<
27             setw(10)<<f.Nation<<
28             setw(10)<<f.Year<<endl;
29             return out;
30 }
31 istream& operator>>(istream &in,Film &f){
32     cout<<"录入片名:";
33     in>>f.Name;
34     cout<<endl<<"录入导演:";
35     in>>f.Director;
36     cout<<endl<<"录入制片国家/地区:";
37     in>>f.Nation;
38     cout<<endl<<"录入上映年份:";
39     in>>f.Year;
40     return in;
41 }
42 
43 int Film::get_year() const{
44     return Year;
45 }
46 
47 bool compare_by_year(const Film f1,const Film f2){
48     return f1.get_year()<f2.get_year();
49 }

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实验五代码：

  1 #include<iostream>
  2 
  3 using namespace std;
  4 
  5 template<class T>
  6 class Complex{
  7     public:
  8         Complex(T r=0,T i=0);
  9         Complex(const Complex &c);
 10         T get_real() const;
 11         T get_imag() const;
 12         Complex operator+=(const Complex &c){
 13             this->real=real+c.real;
 14             this->imag=imag+c.imag;
 15             return *this;
 16         }
 17         friend bool operator==(const Complex &c1,const Complex &c2){
 18             if(c1.get_real()==c2.get_real() && c1.get_imag()==c2.get_imag())
 19                 return 1;
 20             else
 21                 return 0;
 22         }
 23         friend ostream& operator<<(ostream &out,const Complex &c){
 24             if(c.imag>=0)
 25                 out<<c.real<<"+"<<c.imag<<"i"<<endl;
 26             else
 27                 out<<c.real<<c.imag<<"i"<<endl;
 28             return out;
 29         }
 30         friend istream& operator>>(istream &in,Complex &c){
 31             in>>c.real>>c.imag;
 32             return in;
 33         }
 34         Complex operator+(const Complex &c1){
 35             Complex c2;
 36             c2.real=real+c1.real;
 37             c2.imag=imag+c1.imag;
 38             return c2;
 39         }
 40     private:
 41         T imag,real;
 42 };
 43 
 44 template<class T>
 45 Complex<T>::Complex(T r,T i):real(r),imag(i){}
 46 
 47 template<class T>
 48 Complex<T>::Complex(Complex const &c){
 49     real=c.real;
 50     imag=c.imag;
 51 }
 52 
 53 template<class T>
 54 T Complex<T>::get_real() const {
 55     return real;
 56 }
 57 
 58 template<class T>
 59 T Complex<T>::get_imag() const {
 60     return imag;
 61 }
 62 
 63 
 64 
 65 
 66 #include "Complex.hpp"
 67 #include <iostream>
 68 
 69 using std::cin;
 70 using std::cout;
 71 using std::endl;
 72 using std::boolalpha;
 73 
 74 void test1() {
 75     Complex<int> c1(2, -5), c2(c1);
 76 
 77     cout << "c1 = " << c1 << endl;
 78     cout << "c2 = " << c2 << endl;
 79     cout << "c1 + c2 = " << c1 + c2 << endl;
 80     
 81     c1 += c2;
 82     cout << "c1 = " << c1 << endl;
 83     cout << boolalpha << (c1 == c2) << endl;
 84 }
 85 
 86 void test2() {
 87     Complex<double> c1, c2;
 88     cout << "Enter c1 and c2: ";
 89     cin >> c1 >> c2;
 90     cout << "c1 = " << c1 << endl;
 91     cout << "c2 = " << c2 << endl;
 92 
 93     cout << "c1.real = " << c1.get_real() << endl;
 94     cout << "c1.imag = " << c1.get_imag() << endl;
 95 }
 96 
 97 int main() {
 98     cout << "自定义类模板Complex测试1: " << endl;
 99     test1();
100 
101     cout << endl;
102 
103     cout << "自定义类模板Complex测试2: " << endl;
104     test2();
105 }

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实验六代码：

  1 #pragma once
  2 
  3 class Date {
  4     private:
  5         int year;
  6         int month;
  7         int day;
  8         int totalDays;
  9     public:
 10         Date(int year, int month, int day);
 11         int getYear() const {
 12             return year;
 13         }
 14         int getMonth() const {
 15             return month;
 16         }
 17         int getDay() const {
 18             return day;
 19         }
 20         int getMaxDay() const;
 21         bool isLeapYear() const {
 22             return year % 4 == 0 && year % 100 != 0 || year % 400 == 0;
 23         }
 24         void show() const;
 25         int operator-(const Date& date) const {
 26             return totalDays - date.totalDays;
 27         }
 28 };
 29 
 30 
 31 
 32 
 33 
 34 #include "date.h"
 35 #include <iostream>
 36 #include <cstdlib>
 37 
 38 using namespace std;
 39 
 40 namespace {
 41     const int DAYS_BEFIRE_MONTH[] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 };
 42 }
 43 
 44 Date::Date(int year, int month, int day) : year(year), month(month), day(day) {
 45     if (day <= 0 || day > getMaxDay()) {
 46         cout << "Invalid date: ";
 47         show();
 48         cout << endl;
 49         exit(1);
 50     }
 51     int years = year - 1;
 52     totalDays = years * 365 + years / 4 - years / 100 + years / 400 + DAYS_BEFIRE_MONTH[month - 1] + day;
 53     if (isLeapYear() && month > 2) totalDays++;
 54 }
 55 
 56 int Date::getMaxDay() const {
 57     if (isLeapYear() && month == 2)
 58         return 29;
 59     else
 60         return DAYS_BEFIRE_MONTH[month] - DAYS_BEFIRE_MONTH[month - 1];
 61 }
 62 
 63 void Date::show() const {
 64     cout << getYear() << "-" << getMonth() << "-" << getDay();
 65 }
 66 
 67 
 68 
 69 
 70 
 71 #pragma once
 72 
 73 #include "date.h"
 74 
 75 class Accumulator {
 76 private:
 77     Date lastDate;
 78     double value;
 79     double sum;
 80 
 81 public:
 82     double getSum(const Date& date) const {
 83         return sum + value * (date - lastDate); 
 84     }
 85     Accumulator(const Date& date, double value) : lastDate(date), value(value), sum{ 0 } {}
 86 
 87    void change(const Date& date, double value) {
 88        sum = getSum(date);
 89        lastDate = date;
 90        this->value = value;
 91    }
 92 
 93    void reset(const Date& date, double value) {
 94        lastDate = date;
 95         this->value = value;
 96        sum = 0;
 97     }
 98 };
 99 
100 
101 
102 
103 #pragma once
104 
105 #include "date.h"
106 #include "accumulator.h"
107 #include <string>
108 
109 class Account {
110 private:
111     std::string id;
112     double balance;
113     static double total;
114 protected:
115     Account(const Date &date, const std::string &id);
116     void record(const Date& date, double amount, const std::string& desc);
117     void error(const std::string& msg) const;
118 public:
119     const std::string& getId() {
120         return id;
121     }
122     double getBalance() const {
123         return balance;
124     }
125     static double getTotal() {
126         return total;
127     }
128     virtual void deposit(const Date& date, double amount, const std::string& desc) = 0;
129     virtual void withdraw(const Date& date, double amount, const std::string& desc) = 0;
130     virtual void settle(const Date& date) = 0;
131     virtual void show() const;
132 };
133 
134 class SavingsAccount : public Account {
135 private:
136     Accumulator acc;
137     double rate;
138 public:
139     SavingsAccount(const Date& date, const std::string& id, double rate);
140     double getRate() const {
141         return rate;
142     }
143     void deposit(const Date& date, double amount, const std::string& desc);
144     void withdraw(const Date& date, double amount, const std::string& desc);
145     void settle(const Date& date);
146 };
147 
148 class CreditAccount : public Account {
149 private:
150     Accumulator acc;
151     double credit;
152     double rate;
153     double fee;
154     double getDebt() const {
155         double balance = getBalance();
156         return (balance < 0 ? balance : 0);
157     }
158 public:
159     CreditAccount(const Date& date, const std::string& id, double credit, double rate, double fee);
160     double getCredit() const {
161         return credit;
162     }
163     double getRate() const {
164         return rate;
165     }
166     double getFee() const {
167         return fee;
168     }
169     double getAvailableCredit() const {
170         if (getBalance() < 0) return credit + getBalance();
171         else return credit;
172     }
173     void deposit(const Date& date, double amount, const std::string& desc);
174     void withdraw(const Date& date, double amount, const std::string& desc);
175     void settle(const Date& date);
176     void show() const;
177 };
178 
179 
180 
181 
182 #include "account.h"
183 #include <cmath>
184 #include<iostream>
185 using namespace std;
186 
187 double Account::total = 0;
188 Account::Account(const Date& date, const string& id) : id(id), balance(0) {
189     date.show();
190     cout << "\t#" << id << " created" << endl;
191 
192 }
193 
194 void Account::record(const Date& date, double amount, const string& desc) {
195     amount = floor(amount * 100 + 0.5) / 100;
196     balance += amount;
197     total += amount;
198     date.show();
199        cout << "\t#" << id << "\t" << amount << "\t" << balance << "\t" << desc << endl;
200 
201 }
202 
203 void Account::show() const {
204     cout << id << "\tBalance: " << balance;
205 
206 }
207 
208 void Account::error(const string& msg) const {
209     cout << "Error (#" << id << "): " << msg << endl;
210 
211 }
212 
213 SavingsAccount::SavingsAccount(const Date& date, const string& id, double rate)
214     : Account(date, id), rate(rate), acc(date, 0) {}
215 
216 void SavingsAccount::deposit(const Date& date, double amount, const string& desc) {
217     record(date, amount, desc);
218     acc.change(date, getBalance());
219 
220 }
221 
222 void SavingsAccount::withdraw(const Date& date, double amount, const string& desc) {
223     if (amount > getBalance()) {
224         error("not enough money");
225 
226     }
227    else {
228         record(date, -amount, desc);
229          acc.change(date, getBalance());
230     }
231 
232 }
233 
234 void SavingsAccount::settle(const Date& date) {
235     if (date.getMonth() == 1)
236     {
237         double interest = acc.getSum(date) * rate / (date - Date(date.getYear() - 1, 1, 1));
238         if (interest != 0) record(date, interest, "interest");
239         acc.reset(date, getBalance());
240     }
241 }
242 
243 CreditAccount::CreditAccount(const Date& date, const string& id, double credit, double rate, double fee)
244     : Account(date, id), credit(credit), rate(rate), fee(fee), acc(date, 0) {}
245 
246 void CreditAccount::deposit(const Date& date, double amount, const string& desc) {
247     record(date, amount, desc);
248     acc.change(date, getDebt());
249 
250 }
251 
252 void CreditAccount::withdraw(const Date& date, double amount, const string& desc) {
253     if (amount - getBalance() > credit) {
254         error("not enough credit");
255 
256     }
257     else {
258         record(date, -amount, desc);
259         acc.change(date, getDebt());
260 
261     }
262 
263 }
264 
265 void CreditAccount::settle(const Date& date) {
266     double interest = acc.getSum(date) * rate;
267     if (interest != 0) record(date, interest, "interest");
268     if (date.getMonth() == 1) record(date, -fee, "annual fee");
269     acc.reset(date, getDebt());
270 
271 }
272 
273 void CreditAccount::show() const {
274     Account::show();
275     cout << "\tAvailable credit: " << getAvailableCredit();
276  
277  }
278 
279 
280 
281 
282 #include"account.h"
283 #include<iostream> 
284 
285 using namespace std;
286 
287 int main() {
288     Date date(2008, 11, 1);
289     SavingsAccount sa1(date, "S3755217", 0.015);
290     SavingsAccount sa2(date, "02342342", 0.015);
291     CreditAccount ca(date, "C5392394", 10000, 0.0005, 50);
292     Account* accounts[] = { &sa1,&sa2,&ca };
293     const int n = sizeof(accounts) / sizeof(Account*);
294     cout << "(d)deposit (w)withdraw (s)show (c)change day (n)next month (e)exit" << endl;
295     char cmd;
296     do {
297         date.show();
298         cout << "\tTotal:" << Account::getTotal() << "\tcommand>";
299         int index, day;
300         double amount;
301         string desc;
302         cin >> cmd;
303         switch (cmd) {
304             case 'd':
305                 cin >> index >> amount;
306                 getline(cin, desc);
307                 accounts[index]->deposit(date, amount, desc);
308                 break;
309 
310             case 'w':
311                 cin >> index >> amount;
312                 getline(cin, desc);
313                 accounts[index]->withdraw(date, amount, desc);
314                 break;
315             case 's':
316                 for (int i = 0; i < n; i++) {
317                     cout << "[" << i << "]";
318                     accounts[i]->show();
319                     cout << endl;
320                 }
321                 break;
322 
323             case 'c':
324                 cin >> day;
325                 if (day < date.getDay()) {
326                     cout << "You cannot specify a previous day";
327                 } else if (day > date.getMaxDay())
328                     cout << "Invalid day";
329                 else date = Date(date.getYear(), date.getMonth(), day);
330                 break;
331             case 'n':
332                 if (date.getMonth() == 12)
333                     date = Date(date.getYear() + 1, 1, 1);
334                 else date = Date(date.getYear(), date.getMonth() + 1, 1);
335                 for (int i = 0; i < n; i++) {
336                     accounts[i]->settle(date);
337                 }
338                 break;
339         }
340     } while (cmd != 'e');
341     return 0;
342 }

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posted @ 2024-12-07 22:08 严文奇阅读(2) 评论(0) 编辑收藏举报

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