实验五

task3源代码：

 1 #pragma once
 2 
 3 #include<iostream>
 4 #include<string>
 5 
 6 using namespace std;
 7 
 8 class MachinePets {
 9     public:
10         MachinePets(const string s);
11         string get_nickname() const;
12         virtual string talk() = 0;
13         
14     private:
15         string nickname;
16 };
17 
18 class PetsCats : public MachinePets{
19     public:
20         PetsCats(const string s);
21         string talk() override;
22 };
23 
24 class PetsDogs : public MachinePets {
25     public:
26         PetsDogs(const string s);
27         string talk() override;
28 };
29 
30 MachinePets::MachinePets(const string s): nickname{s} {}
31 
32 string MachinePets::get_nickname() const {
33     return nickname;
34 }
35 
36 PetsCats::PetsCats(const string s): MachinePets{s} {}
37 
38 string PetsCats::talk() {
39     return "Nya~";
40 }
41 
42 PetsDogs::PetsDogs(const string s): MachinePets{s} {}
43 
44 string PetsDogs::talk() {
45     return "wang!";
46 }

pets.hpp

 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     PetsCats cat("miku");
10     PetsDogs dog("da huang");
11     
12     play( cat );
13     play( dog );
14 }
15 
16 int main() {
17     test();
18 }

task3.cpp

task3运行结果：

task4源代码：

 1 #pragma once
 2 
 3 #include<iostream>
 4 #include<string>
 5 
 6 using namespace std;
 7 
 8 class Person {
 9     public:
10         Person() = default;
11         Person(const string name, const string telephone, const string email = "");
12         Person(const Person &p);
13         ~Person() = default;
14         
15         void update_telephone() {
16             cout << "输入电话号码：";
17             cout << telephone;
18             cout << endl << "电话号码已更新。。" << endl;
19         }
20         
21         void update_email() {
22             cout << "输入emai：";
23             cout << email;
24             cout << endl << "email已更新。。" << endl;
25         }
26         
27     friend  std::ostream& operator<<(std::ostream& out, const Person& t)
28     {
29             out << "name：" << t.name << endl;
30             out << "telephone：" << t.telephone << endl;
31             out << "email：" << t.email << endl;
32             return out;
33     }
34     
35     friend std::istream& operator>>(std::istream& in,  Person& t)
36     {
37         in >> t.name >> t.telephone >> t.email;
38         cout << endl;
39         return in;
40     }
41     
42     friend bool operator==(const Person& s1, const Person& s2)
43     {
44         if (s1.name == s2.name && s1.telephone == s2.telephone && s1.email == s2.email)
45             return true;
46         else
47             return false;
48     }
49         
50     private:
51         string name;
52         string telephone;
53         string email;
54 };
55 
56 Person::Person(const string name, const string telephone, const string email): name{name}, telephone{telephone}, email{email} {}
57 
58 Person::Person(const Person &p): name{p.name}, telephone{p.telephone}, email{p.email} {}

Person.hpp

 1 #include<iostream>
 2 #include<vector>
 3 #include"Person.hpp"
 4 
 5 void test() {
 6     using namespace std;
 7     vector<Person> phone_book;
 8     Person p;
 9     
10     cout << "输入一组联系人的联系方式，E直至按下Crtl+Z终止\n";
11     while(cin >> p) {
12         phone_book.push_back(p);
13     }
14     
15     cout << "\n更新phone_book中索引为0的联系人的手机号、邮箱：\n";
16     phone_book.at(0).update_telephone();
17     phone_book.at(0).update_email();
18     
19     cout << "\n测试两个联系人是否是同一个：\n";
20     cout << boolalpha << (phone_book.at(0) == phone_book.at(1)) << endl;
21 }
22 
23 int main() {
24     test();
25 }

task4.cpp

task4运行结果：

task5源代码：

 1 #include"date.h"
 2 #include"accumulator.h"
 3 #include<string>
 4 
 5 class Account {
 6 private:
 7     std::string id;
 8     double balance;
 9     static double total;
10     
11 protected:
12     Account(const Date& date, const std::string& id);
13     void record(const Date& date, double amount, const std::string& desc);
14     void error(const std::string& msg) const;
15     
16 public:
17     const std::string& getId() const { return id; }
18     double getBalance() const { return balance; }
19     static double getTotal() { return total; }
20     virtual void deposit(const Date& date, double amount, const std::string& desc) = 0;
21     virtual void withdraw(const Date& date, double amount, const std::string& desc) = 0;
22     virtual void settle(const Date& date);
23     virtual void show() const;
24 };
25 
26 class SavingsAccount : public Account {
27 private:
28     Accumulator acc;
29     double rate;
30     
31 public:
32     SavingsAccount(const Date& date, const std::string& id, double rate);
33     double getRate() const { return rate; }
34     void deposit(const Date& date, double amount, const std::string& desc);
35     void withdraw(const Date& date, double amount, const std::string& desc);
36     void settle(const Date& date);
37 };
38 
39 class CreditAccount :public Account {
40 private:
41     Accumulator acc;
42     double credit;
43     double rate;
44     double fee;
45     double getDebt() const
46     {
47         double balance = getBalance();
48         return(balance < 0 ? balance : 0);
49     }
50     
51 public:
52     CreditAccount(const Date& date, const std::string& id, double credit, double rate, double fee);
53     double getCredit() const { return credit; }
54     double getRate() const { return rate; }
55     double getFee() const { return fee; }
56     
57     double getAvailableCredit() const {
58         if (getBalance() < 0)
59             return credit + getBalance();
60         else
61             return credit;
62     }
63     
64     void deposit(const Date& date, double amount, const std::string& desc);
65     void withdraw(const Date& date, double amount, const std::string& desc);
66     void settle(const Date& date);
67     void show() const;
68 };

account.h

 1 #pragma once
 2 
 3 #include"date.h"
 4 #include<iostream>
 5 
 6 class Accumulator {
 7 private:
 8     Date lastDate;
 9     double value;
10     double sum;
11     
12 public:
13     Accumulator(const Date& date, double value)
14         :lastDate(date), value(value), sum(0) {}
15     double getSum(const Date& date) const {
16         return sum + value * (date - lastDate);
17     }
18     void change(const Date& date, double value) {
19         sum = getSum(date);
20         lastDate = date; this->value = value;
21     }
22     void reset(const Date& date, double value) {
23         lastDate = date; this->value = value; sum = 0;
24     }
25 };

accumulator.h

 1 #include"date.h"
 2 #include<iostream>
 3 
 4 class Accumulator {
 5 private:
 6     Date lastDate;
 7     double value;
 8     double sum;
 9     
10 public:
11     Accumulator(const Date&date,double value):lastDate{date},value{value},sum{0}{}
12     
13     double getSum(const Date& date)const {
14         return sum + value * (date - lastDate);
15     }
16     
17     void change(const Date& date, double value) {
18         sum = getSum(date);
19         lastDate = date; this->value = value;
20     }
21     
22     void reset(const Date& date, double value) {
23         lastDate = date; this->value = value; sum = 0;
24     }
25 };

accumulator.cpp

 1 #pragma once
 2 
 3 #include<iostream>
 4 
 5 class Date {
 6 private:
 7     int year;
 8     int month;
 9     int day;
10     int totalDays;
11     
12 public:
13     Date(int year, int month, int day);
14     int getYear() const { return year; }
15     int getMonth() const { return month; }
16     int getDay() const { return day; }
17     int getMaxDay() const;
18     
19     bool isLeapYear() const {
20         return year % 4 == 0 && year % 100 != 0 || year % 400 == 0;
21     }
22     void show() const;
23     
24     int operator-(const Date& date)const {
25         return totalDays - date.totalDays;
26     }
27 };

date.h

 1 #include"date.h"
 2 #include<iostream>
 3 #include<cstdlib>
 4 
 5 using namespace std;
 6 
 7 namespace {
 8     const int DAYS_BEFORE_MONTH[] = { 0,31,59,90,120,151,181,212,243,273,304,334,365 };
 9 }
10 
11 Date::Date(int year, int month, int day) :year(year), month(month), day(day) {
12     if (day <= 0 || day > getMaxDay()) {
13         cout << "Invalid date: ";
14         show();
15         cout << endl;
16         exit(1);
17     }
18     int years = year - 1;
19     totalDays= years * 365 + years / 4 - years / 100 + years / 400 + DAYS_BEFORE_MONTH[month - 1] + day;
20     if (isLeapYear() && month > 2)totalDays++;
21 }
22 
23 int Date::getMaxDay() const {
24     if (isLeapYear() && month == 2)
25         return 29;
26     else
27         return DAYS_BEFORE_MONTH[month] - DAYS_BEFORE_MONTH[month - 1];
28 }
29 
30 void Date::show()const {
31     cout << getYear() << "-" << getMonth() << "-" << getDay();
32 }

date.cpp

 1 #include "account.h"
 2 #include <iostream>
 3 
 4 using namespace std;
 5 
 6 int main() {
 7     Date date(2008, 11, 1);   
 8     SavingsAccount sa1(date, "S3755217", 0.015);
 9     SavingsAccount sa2(date, "02342342", 0.015);
10     CreditAccount ca(date, "C5392394", 10000, 0.0005, 50);
11     Account *accounts[] = { &sa1, &sa2, &ca };
12     const int n = sizeof(accounts) / sizeof(Account*);  
13 
14     cout << "(d)deposit (w)withdraw (s)show (c)change day (n)next month (e)exit" << endl;
15     char cmd;
16     do {
17         date.show();
18         cout << "\tTotal: " << Account::getTotal() << "\tcommand> ";
19 
20         int index, day;
21         double amount;
22         string desc;
23 
24         cin >> cmd;
25         switch (cmd) {
26         case 'd':
27             cin >> index >> amount;
28             getline(cin, desc);
29             accounts[index]->deposit(date, amount, desc);
30             break;
31         case 'w':  
32             cin >> index >> amount;
33             getline(cin, desc);
34             accounts[index]->withdraw(date, amount, desc);
35             break;
36         case 's': 
37             for (int i = 0; i < n; i++) {
38                 cout << "[" << i << "] ";
39                 accounts[i]->show();
40                 cout << endl;
41             }
42             break;
43         case 'c':
44             cin >> day;
45             if (day < date.getDay())
46                 cout << "You cannot specify a previous day";
47             else if (day > date.getMaxDay())
48                 cout << "Invalid day";
49             else
50                 date = Date(date.getYear(), date.getMonth(), day);
51             break;
52         case 'n': 
53             if (date.getMonth() == 12)
54                 date = Date(date.getYear() + 1, 1, 1);
55             else
56                 date = Date(date.getYear(), date.getMonth() + 1, 1);
57             for (int i = 0; i < n; i++)
58                 accounts[i]->settle(date);
59             break;
60         }
61     } while (cmd != 'e');
62     return 0;
63 }

task5.cpp

task5运行结果：

posted on 2023-12-13 21:32 豪雅阅读(5) 评论(0) 收藏举报