OOP實(shí)驗(yàn)四
任務(wù)2：
源碼：
1 #include <iostream> 2 #include <vector> 3 #include <string> 4 #include <algorithm> 5 #include <numeric> 6 #include <iomanip> 7 8 using std::vector; 9 using std::string; 10 using std::cin; 11 using std::cout; 12 using std::endl; 13 14 class GradeCalc : public vector<int> { 15 public: 16 GradeCalc(const string& cname, int size); 17 void input(); // 錄入成績(jī) 18 void output() const; // 輸出成績(jī) 19 void sort(bool ascending = false); // 排序 (默認(rèn)降序) 20 int min() const; // 返回最低分 21 int max() const; // 返回最高分 22 float average() const; // 返回平均分 23 void info(); // 輸出課程成績(jī)信息 24 25 private: 26 void compute(); // 成績(jī)統(tǒng)計(jì) 27 28 private: 29 string course_name; // 課程名 30 int n; // 課程人數(shù) 31 vector<int> counts = vector<int>(5, 0); // 保存各分?jǐn)?shù)段人數(shù)（[0, 60), [60, 70), [70, 80), [80, 90), [90, 100] 32 vector<double> rates = vector<double>(5, 0); // 保存各分?jǐn)?shù)段比例 33 }; 34 35 GradeCalc::GradeCalc(const string& cname, int size) : course_name{ cname }, n{ size } {} 36 37 void GradeCalc::input() { 38 int grade; 39 40 for (int i = 0; i < n; ++i) { 41 cin >> grade; 42 this->push_back(grade); 43 } 44 } 45 46 void GradeCalc::output() const { 47 for (auto ptr = this->begin(); ptr != this->end(); ++ptr) 48 cout << *ptr << " "; 49 cout << endl; 50 } 51 52 void GradeCalc::sort(bool ascending) { 53 if (ascending) 54 std::sort(this->begin(), this->end()); 55 else 56 std::sort(this->begin(), this->end(), std::greater<int>()); 57 } 58 59 int GradeCalc::min() const { 60 return *std::min_element(this->begin(), this->end()); 61 } 62 63 int GradeCalc::max() const { 64 return *std::max_element(this->begin(), this->end()); 65 } 66 67 float GradeCalc::average() const { 68 return std::accumulate(this->begin(), this->end(), 0) * 1.0 / n; 69 } 70 71 void GradeCalc::compute() { 72 for (int grade : *this) { 73 if (grade < 60) 74 counts.at(0)++; 75 else if (grade >= 60 && grade < 70) 76 counts.at(1)++; 77 else if (grade >= 70 && grade < 80) 78 counts.at(2)++; 79 else if (grade >= 80 && grade < 90) 80 counts.at(3)++; 81 else if (grade >= 90) 82 counts.at(4)++; 83 } 84 85 for (int i = 0; i < rates.size(); ++i) 86 rates.at(i) = counts.at(i) * 1.0 / n; 87 } 88 89 void GradeCalc::info() { 90 cout << "課程名稱:\t" << course_name << endl; 91 cout << "排序后成績(jī): \t"; 92 sort(); output(); 93 cout << "最高分:\t" << max() << endl; 94 cout << "最低分:\t" << min() << endl; 95 cout << "平均分:\t" << std::fixed << std::setprecision(2) << average() << endl; 96 97 compute(); // 統(tǒng)計(jì)各分?jǐn)?shù)段人數(shù)、比例 98 99 vector<string> tmp{ "[0, 60) ", "[60, 70)", "[70, 80)","[80, 90)", "[90, 100]" }; 100 for (int i = tmp.size() - 1; i >= 0; --i) 101 cout << tmp[i] << "\t: " << counts[i] << "人\t" 102 << std::fixed << std::setprecision(2) << rates[i] * 100 << "%" << endl; 103 }
1 #include "GradeCalc.hpp" 2 #include <iomanip> 3 4 void test() { 5 int n; 6 cout << "輸入班級(jí)人數(shù): "; 7 cin >> n; 8 9 GradeCalc c1("OOP", n); 10 11 cout << "錄入成績(jī): " << endl;; 12 c1.input(); 13 cout << "輸出成績(jī): " << endl; 14 c1.output(); 15 16 cout << string(20, '*') + "課程成績(jī)信息" + string(20, '*') << endl; 17 c1.info(); 18 } 19 20 int main() { 21 test(); 22 }
結(jié)果：
答：
問(wèn)題1：派生類GradeCalc定義中，成績(jī)存儲(chǔ)在哪里？派生類方法sort, min, max, average,
output都要訪問(wèn)成績(jī)，是通過(guò)什么接口訪問(wèn)到每個(gè)成績(jī)的？input方法是通過(guò)什么接口實(shí)現(xiàn)數(shù)
據(jù)存入對(duì)象的？
基類vector。vector中的接口。vector::push_back。
問(wèn)題2：代碼line68分母的功能是？去掉乘以1.0代碼，重新編譯、運(yùn)行，結(jié)果有影響嗎？為什
么要乘以1.0？
將數(shù)據(jù)轉(zhuǎn)換為浮點(diǎn)型。有。輸出小數(shù)而不是整數(shù)。
問(wèn)題3：從真實(shí)應(yīng)用場(chǎng)景角度考慮，GradeCalc類在設(shè)計(jì)及代碼實(shí)現(xiàn)細(xì)節(jié)上，有哪些地方尚未
考慮周全，仍需繼續(xù)迭代、完善？
缺少查詢功能。
任務(wù)3：
源碼：
1 #include <iostream> 2 #include <vector> 3 #include <string> 4 #include <algorithm> 5 #include <numeric> 6 #include <iomanip> 7 8 using std::vector; 9 using std::string; 10 using std::cin; 11 using std::cout; 12 using std::endl; 13 14 class GradeCalc { 15 public: 16 GradeCalc(const string& cname, int size); 17 void input(); // 錄入成績(jī) 18 void output() const; // 輸出成績(jī) 19 void sort(bool ascending = false); // 排序 (默認(rèn)降序) 20 int min() const; // 返回最低分 21 int max() const; // 返回最高分 22 float average() const; // 返回平均分 23 void info(); // 輸出課程成績(jī)信息 24 25 private: 26 void compute(); // 成績(jī)統(tǒng)計(jì) 27 28 private: 29 string course_name; // 課程名 30 int n; // 課程人數(shù) 31 vector<int> grades; // 課程成績(jī) 32 vector<int> counts = vector<int>(5, 0); // 保存各分?jǐn)?shù)段人數(shù)（[0, 60), [60, 70), [70, 80), [80, 90), [90, 100] 33 vector<double> rates = vector<double>(5, 0); // 保存各分?jǐn)?shù)段比例 34 }; 35 36 GradeCalc::GradeCalc(const string& cname, int size) : course_name{ cname }, n{ size } {} 37 38 void GradeCalc::input() { 39 int grade; 40 41 for (int i = 0; i < n; ++i) { 42 cin >> grade; 43 grades.push_back(grade); 44 } 45 } 46 47 void GradeCalc::output() const { 48 for (int grade : grades) 49 cout << grade << " "; 50 cout << endl; 51 } 52 53 void GradeCalc::sort(bool ascending) { 54 if (ascending) 55 std::sort(grades.begin(), grades.end()); 56 else 57 std::sort(grades.begin(), grades.end(), std::greater<int>()); 58 59 } 60 61 int GradeCalc::min() const { 62 return *std::min_element(grades.begin(), grades.end()); 63 } 64 65 int GradeCalc::max() const { 66 return *std::max_element(grades.begin(), grades.end()); 67 } 68 69 float GradeCalc::average() const { 70 return std::accumulate(grades.begin(), grades.end(), 0) * 1.0 / n; 71 } 72 73 void GradeCalc::compute() { 74 for (int grade : grades) { 75 if (grade < 60) 76 counts.at(0)++; 77 else if (grade >= 60 && grade < 70) 78 counts.at(1)++; 79 else if (grade >= 70 && grade < 80) 80 counts.at(2)++; 81 else if (grade >= 80 && grade < 90) 82 counts.at(3)++; 83 else if (grade >= 90) 84 counts.at(4)++; 85 } 86 87 for (int i = 0; i < rates.size(); ++i) 88 rates.at(i) = counts.at(i) * 1.0 / n; 89 } 90 91 void GradeCalc::info() { 92 cout << "課程名稱:\t" << course_name << endl; 93 cout << "排序后成績(jī): \t"; 94 sort(); output(); 95 cout << "最高分:\t" << max() << endl; 96 cout << "最低分:\t" << min() << endl; 97 cout << "平均分:\t" << std::fixed << std::setprecision(2) << average() << endl; 98 99 compute(); // 統(tǒng)計(jì)各分?jǐn)?shù)段人數(shù)、比例 100 101 vector<string> tmp{ "[0, 60) ", "[60, 70)", "[70, 80)","[80, 90)", "[90, 100]" }; 102 for (int i = tmp.size() - 1; i >= 0; --i) 103 cout << tmp[i] << "\t: " << counts[i] << "人\t" 104 << std::fixed << std::setprecision(2) << rates[i] * 100 << "%" << endl; 105 }
1 #include "GradeCalc.hpp" 2 #include <iomanip> 3 4 void test() { 5 int n; 6 cout << "輸入班級(jí)人數(shù): "; 7 cin >> n; 8 9 GradeCalc c1("OOP", n); 10 11 cout << "錄入成績(jī): " << endl;; 12 c1.input(); 13 cout << "輸出成績(jī): " << endl; 14 c1.output(); 15 16 cout << string(20, '*') + "課程成績(jī)信息" + string(20, '*') << endl; 17 c1.info(); 18 } 19 20 int main() { 21 test(); 22 }
結(jié)果：
答：
問(wèn)題1：組合類GradeCalc定義中，成績(jī)存儲(chǔ)在哪里？組合類方法sort, min, max, average,
output都要訪問(wèn)成績(jī)，是通過(guò)什么訪問(wèn)到每一個(gè)成績(jī)的？觀察與實(shí)驗(yàn)任務(wù)2在代碼寫(xiě)法細(xì)節(jié)上
的差別。
成員vector。vector本身的接口。
問(wèn)題2：對(duì)比實(shí)驗(yàn)任務(wù)2和實(shí)驗(yàn)任務(wù)3，主體代碼邏輯（測(cè)試代碼）沒(méi)有變更，類GradeCalc的
接口也沒(méi)變，變化的是類GradeCalc的設(shè)計(jì)及接口內(nèi)部實(shí)現(xiàn)細(xì)節(jié)。你對(duì)面向?qū)ο缶幊逃惺裁葱?/div>
的理解和領(lǐng)悟嗎？
封裝方式多樣。
任務(wù)4：
源碼：
1 #include <iostream> 2 #include <string> 3 #include <limits> 4 5 using namespace std; 6 7 void test1() { 8 string s1, s2; 9 cin >> s1 >> s2; // cin: 從輸入流讀取字符串, 碰到空白符(空格/回車/Tab)即結(jié)束 10 cout << "s1: " << s1 << endl; 11 cout << "s2: " << s2 << endl; 12 } 13 14 void test2() { 15 string s1, s2; 16 getline(cin, s1); // getline(): 從輸入流中提取字符串，直到遇到換行符 17 getline(cin, s2); 18 cout << "s1: " << s1 << endl; 19 cout << "s2: " << s2 << endl; 20 } 21 22 void test3() { 23 string s1, s2; 24 getline(cin, s1, ' '); //從輸入流中提取字符串，直到遇到指定分隔符 25 getline(cin, s2); 26 cout << "s1: " << s1 << endl; 27 cout << "s2: " << s2 << endl; 28 } 29 30 int main() { 31 cout << "測(cè)試1: 使用標(biāo)準(zhǔn)輸入流對(duì)象cin輸入字符串" << endl; 32 test1(); 33 cout << endl; 34 35 //cin.ignore(numeric_limits<streamsize>::max(), '\n'); 36 37 cout << "測(cè)試2: 使用函數(shù)getline()輸入字符串" << endl; 38 test2(); 39 cout << endl; 40 41 cout << "測(cè)試3: 使用函數(shù)getline()輸入字符串, 指定字符串分隔符" << endl; 42 test3(); 43 }
1 #include <iostream> 2 #include <string> 3 #include <vector> 4 #include <limits> 5 6 using namespace std; 7 8 void output(const vector<string>& v) { 9 for (auto& s : v) 10 cout << s << endl; 11 } 12 13 void test() { 14 int n; 15 while (cout << "Enter n: ", cin >> n) { 16 vector<string> v1; 17 18 for (int i = 0; i < n; ++i) { 19 string s; 20 cin >> s; 21 v1.push_back(s); 22 } 23 24 cout << "output v1: " << endl; 25 output(v1); 26 cout << endl; 27 } 28 } 29 30 int main() { 31 cout << "測(cè)試: 使用cin多組輸入字符串" << endl; 32 test(); 33 }
1 #include <iostream> 2 #include <string> 3 #include <vector> 4 #include <limits> 5 6 using namespace std; 7 8 void output(const vector<string>& v) { 9 for (auto& s : v) 10 cout << s << endl; 11 } 12 13 void test() { 14 int n; 15 while (cout << "Enter n: ", cin >> n) { 16 //cin.ignore(numeric_limits<streamsize>::max(), '\n'); 17 18 vector<string> v2; 19 20 for (int i = 0; i < n; ++i) { 21 string s; 22 getline(cin, s); 23 v2.push_back(s); 24 } 25 cout << "output v2: " << endl; 26 output(v2); 27 cout << endl; 28 } 29 } 30 31 int main() { 32 cout << "測(cè)試: 使用函數(shù)getline()多組輸入字符串" << endl; 33 test(); 34 }
結(jié)果：
答：
問(wèn)題1：去掉task4_1.cpp的line35，重新編譯、運(yùn)行，給出此時(shí)運(yùn)行結(jié)果截圖。查閱資料，回
答line35在這里的用途是什么？
消除回車。
問(wèn)題2：去掉task4_3.cpp的line16，重新編譯、運(yùn)行，給出此時(shí)運(yùn)行結(jié)果。查閱資料，回答
line16在這里的用途是什么？
消除回車。
任務(wù)5：
源碼：
1 #include<iostream> 2 using namespace std; 3 template <typename T> 4 class GameResourceManager { 5 private: 6 T resource; 7 public: 8 GameResourceManager(T data); 9 T get() const; 10 void update(T date); 11 }; 12 template <typename T> 13 GameResourceManager<T>::GameResourceManager(T data) :resource{ data } {}; 14 template <typename T> 15 T GameResourceManager<T>::get() const { 16 return resource; 17 } 18 template <typename T> 19 void GameResourceManager<T>::update(T data) { 20 resource += data; 21 if (resource < 0) { 22 resource = 0; 23 } 24 } 25 26 27 #include "grm.hpp" 28 #include <iostream> 29 30 using std::cout; 31 using std::endl; 32 33 void test1() { 34 GameResourceManager<float> HP_manager(99.99); 35 cout << "當(dāng)前生命值: " << HP_manager.get() << endl; 36 HP_manager.update(9.99); 37 cout << "增加9.99生命值后, 當(dāng)前生命值: " << HP_manager.get() << endl; 38 HP_manager.update(-999.99); 39 cout << "減少999.99生命值后, 當(dāng)前生命值: " << HP_manager.get() << endl; 40 } 41 42 void test2() { 43 GameResourceManager<int> Gold_manager(100); 44 cout << "當(dāng)前金幣數(shù)量: " << Gold_manager.get() << endl; 45 Gold_manager.update(50); 46 cout << "增加50個(gè)金幣后, 當(dāng)前金幣數(shù)量: " << Gold_manager.get() << endl; 47 Gold_manager.update(-99); 48 cout << "減少99個(gè)金幣后, 當(dāng)前金幣數(shù)量: " << Gold_manager.get() << endl; 49 } 50 51 52 int main() { 53 cout << "測(cè)試1: 用float類型對(duì)類模板GameResourceManager實(shí)例化" << endl; 54 test1(); 55 cout << endl; 56 57 cout << "測(cè)試2: 用int類型對(duì)類模板GameResourceManager實(shí)例化" << endl; 58 test2(); 59 }
結(jié)果：
任務(wù)6：
源碼：
1 #include<iostream> 2 using namespace std; 3 4 class Info { 5 private: 6 string nikename; 7 string contact; 8 string city; 9 int n; 10 static int sum; 11 public: 12 Info(string name, string ct, string ci, int num); 13 Info(const Info& info); 14 string getName()const; 15 string getContact()const; 16 string getCity()const; 17 int getN()const; 18 void display()const; 19 static int getSum(); 20 static void add(int num); 21 }; 22 int Info::sum = 0; 23 Info::Info(string name, string ct, string ci, int num) :nikename{ name }, contact{ ct }, city{ ci }, n{ num } {} 24 Info::Info(const Info& info) { 25 nikename = info.getName(); 26 contact = info.getContact(); 27 city = info.getCity(); 28 n = info.getN(); 29 } 30 string Info::getName()const { 31 return nikename; 32 } 33 string Info::getContact()const { 34 return contact; 35 } 36 string Info::getCity()const { 37 return city; 38 } 39 int Info::getN()const { 40 return n; 41 } 42 void Info::display()const { 43 cout << "昵稱：\t" << nikename << endl 44 << "聯(lián)系方式：\t" << contact << endl 45 << "所在城市：\t" << city << endl 46 << "預(yù)定人數(shù)：\t" << n << endl; 47 } 48 int Info::getSum() { 49 return sum; 50 } 51 void Info::add(int num) { 52 sum += num; 53 } 54 55 56 #include"Info.hpp" 57 #include<vector> 58 #define capacity 100 59 int main() { 60 vector<Info> audience_lst; 61 cout << "錄入用戶預(yù)約信息：" << endl; 62 cout << "昵稱\t\t聯(lián)系方式（郵箱/手機(jī)號(hào)）\t\t所在城市\(zhòng)t\t預(yù)約參加人數(shù)" << endl; 63 while (Info::getSum() < capacity) { 64 string name, ct, ci; 65 int num; 66 if (!(cin >> name >> ct >> ci >> num)) { 67 break; 68 } 69 if (num + Info::getSum() > capacity) { 70 cout << "對(duì)不起，只剩" << capacity - Info::getSum() << "個(gè)位置" << endl; 71 cout << "1.輸入u,更新（update）預(yù)定信息" << endl << "2.輸入q，放棄預(yù)定" << endl << "你的選擇："; 72 char choice; 73 cin >> choice; 74 if (choice == 'u') { 75 cout << "請(qǐng)重新輸入預(yù)定信息：" << endl; 76 continue; 77 } 78 else{ 79 break; 80 } 81 } 82 else { 83 Info audience(name, ct, ci, num); 84 Info::add(num); 85 audience_lst.push_back(audience); 86 } 87 } 88 cout << "截至目前為止，一共有" << Info::getSum() << "位聽(tīng)眾預(yù)約。預(yù)約聽(tīng)眾信息如下：" << endl; 89 cout << "-------------------------------------" << endl; 90 for (auto i : audience_lst) { 91 cout << "昵稱:\t\t" << i.getName() << endl 92 << "聯(lián)系方式:\t" << i.getContact() << endl 93 << "所在城市:\t" << i.getCity() << endl 94 << "預(yù)定人數(shù):\t" << i.getN() << endl; 95 } 96 return 0; 97 }
結(jié)果：
任務(wù)7：
源碼：
1 #pragma once 2 #ifndef ACCOUNT H 3 #define ACCOUNT H 4 #include"date.h" 5 #include"accumulator.h" 6 #include<string> 7 class Account { 8 private: 9 std::string id; 10 double balance; 11 static double total; 12 protected: 13 Account(const Date & date, const std::string & id); 14 void record(const Date & date, double amount, const std::string & desc); 15 void error(const std::string & msg)const; 16 public: 17 const std::string & getId()const { return id; } 18 double getBalance()const { return balance; } 19 static double getTotal() { return total; } 20 21 void show()const; 22 23 }; 24 class SavingsAccount :public Account { 25 private: 26 Accumulator acc; 27 double rate; 28 public: 29 SavingsAccount(const Date & date, const std::string & id, double rate); 30 double getRate()const { return rate; } 31 32 void deposit(const Date & date, double amount, const std::string & desc); 33 void withdraw(const Date & date, double amount, const std::string & desc); 34 void settle(const Date & date); 35 }; 36 class CreditAccount :public Account { 37 private: 38 Accumulator acc; 39 double credit; 40 double rate; 41 double fee; 42 double getDebt()const { 43 double balance = getBalance(); 44 return (balance < 0 ? balance : 0); 45 } 46 public: 47 CreditAccount(const Date & date, const std::string & id, double credit, double rate, double fee); 48 double getCredit()const { return credit; } 49 double getRate()const { return rate; } 50 double getAvailableCredit()const { 51 if (getBalance() < 0) 52 return credit + getBalance(); 53 else 54 return credit; 55 } 56 void deposit(const Date & date, double amount, const std::string & desc); 57 void withdraw(const Date & date, double amount, const std::string & desc); 58 void settle(const Date & date); 59 void show()const; 60 }; 61 #endif//ACCOUNT H 62 63 64 #pragma once 65 #ifndef ACCUMULATOR H 66 #define ACCUMULATOR H 67 #include"date.h" 68 class Accumulator { 69 private: 70 Date lastDate; 71 double value; 72 double sum; 73 public: 74 Accumulator(const Date & date, double value) :lastDate(date), value(value), sum{ 0 } {} 75 double getSum(const Date & date)const { 76 return sum + value * date.distance(lastDate); 77 } 78 void change(const Date & date, double value) { 79 sum = getSum(date); 80 lastDate = date; this->value = value; 81 } 82 83 void reset(const Date & date, double value) { 84 lastDate = date; this->value = value; sum = 0; 85 } 86 }; 87 #endif//ACCUMULATOR H 88 89 90 #pragma once 91 #ifndef DATE H 92 #define DATE H 93 class Date { 94 private: 95 int year; 96 int month; 97 int day; 98 int totalDays; 99 public: 100 Date(int year, int month, int day); 101 int getYear()const { return year; } 102 int getMonth()const { return month; } 103 int getDay()const { return day; } 104 int getMaxDay()const; 105 bool isLeapYear()const { 106 return year % 4 == 0 && year % 100 != 0 || year % 400 == 0; 107 } 108 void show()const; 109 int distance(const Date & date)const { 110 return totalDays - date.totalDays; 111 } 112 }; 113 #endif// DATE H 114 115 116 117 #include"account.h" 118 #include<cmath> 119 #include<iostream> 120 using namespace std; 121 double Account::total = 0; 122 123 Account::Account(const Date & date, const string & id) :id{ id }, balance{ 0 } { 124 date.show(); cout << "\t#" << id << "created" << endl; 125 } 126 void Account::record(const Date & date, double amount, const string & desc) { 127 amount = floor(amount * 100 + 0.5) / 100; 128 balance += amount; 129 total += amount; 130 date.show(); 131 cout << "\t#" << id << "\t" << amount << "\t" << balance << "\t" << desc << endl; 132 } 133 void Account::show()const { cout << id << "\tBalance:" << balance; } 134 void Account::error(const string & msg)const { 135 cout << "Error(#" << id << "):" << msg << endl; 136 } 137 138 SavingsAccount::SavingsAccount(const Date & date, const string & id, double rate) :Account(date, id), rate(rate), acc(date, 0) {} 139 140 void SavingsAccount::deposit(const Date & date, double amount, const string & desc) { 141 record(date, amount, desc); 142 acc.change(date, getBalance()); 143 } 144 void SavingsAccount::withdraw(const Date & date, double amount, const string & desc) { 145 if (amount > getBalance()) { 146 error("not enough money"); 147 } 148 else { 149 record(date, -amount, desc); 150 acc.change(date, getBalance()); 151 } 152 } 153 154 void SavingsAccount::settle(const Date & date) { 155 double interest = acc.getSum(date) * rate / date.distance(Date(date.getYear() - 1, 1, 1)); 156 if (interest != 0)record(date, interest, "interest"); 157 acc.reset(date, getBalance()); 158 } 159 160 CreditAccount::CreditAccount(const Date & date, const string & id, double credit, double rate, double fee) :Account(date, id), credit(credit), rate(rate), fee(fee), acc(date, 0) {} 161 162 void CreditAccount::deposit(const Date & date, double amount, const string & desc) { 163 record(date, amount, desc); 164 acc.change(date, getDebt()); 165 } 166 167 void CreditAccount::withdraw(const Date & date, double amount, const string & desc) { 168 if (amount - getBalance() > credit) { 169 error("not enough credit"); 170 } 171 else { 172 record(date, -amount, desc); 173 acc.change(date, getDebt()); 174 } 175 } 176 177 void CreditAccount::settle(const Date & date) { 178 double interest = acc.getSum(date) * rate; 179 if (interest != 0)record(date, interest, "interest"); 180 if (date.getMonth() == 1) 181 record(date, -fee, "annual fee"); 182 acc.reset(date, getDebt()); 183 } 184 void CreditAccount::show()const { 185 Account::show(); 186 cout << "\tAvailable credit:" << getAvailableCredit(); 187 } 188 189 190 191 #include"date.h" 192 #include<iostream> 193 #include<cstdlib> 194 using namespace std; 195 namespace { 196 const int DAYS_BEFORE_MONTH[] = { 0,31,59,90,120,151,181,212,243,273,304,334,365 }; 197 } 198 Date::Date(int year, int month, int day) :year{ year }, month{ month }, day{ day } { 199 if (day <= 0 || day > getMaxDay()) { 200 cout << "Invalid date:"; 201 show(); 202 cout << endl; 203 exit(1); 204 205 } 206 int years = year - 1; 207 totalDays = years * 365 + years / 4 - years / 100 + years / 400 + DAYS_BEFORE_MONTH[month - 1] + day; 208 if (isLeapYear() && month > 2)totalDays++; 209 } 210 int Date::getMaxDay()const { 211 if (isLeapYear() && month == 2) 212 return 29; 213 else return DAYS_BEFORE_MONTH[month] - DAYS_BEFORE_MONTH[month - 1]; 214 } 215 void Date::show()const { 216 cout << getYear() << "-" << getMonth() << "-" << getDay(); 217 } 218 219 220 221 #include"account.h" 222 #include<iostream> 223 224 using namespace std; 225 226 int main() { 227 Date date(2008, 11, 1); 228 SavingsAccount sa1(date, "S3755217", 0.015); 229 SavingsAccount sa2(date, "02342342", 0.015); 230 CreditAccount ca(date, "C5392394", 10000, 0.0005, 50); 231 232 sa1.deposit(Date(2008, 11, 5), 5000, "salary"); 233 ca.withdraw(Date(2008, 11, 15), 2000, "buy a cell"); 234 sa2.deposit(Date(2008, 11, 25), 10000, "sell stock 0323"); 235 236 ca.settle(Date(2008, 12, 1)); 237 238 ca.deposit(Date(2008, 12, 1), 2016, "repay the credit"); 239 sa1.deposit(Date(2008, 12, 5), 5500, "salary"); 240 241 sa1.settle(Date(2009, 1, 1)); 242 sa2.settle(Date(2009, 1, 1)); 243 ca.settle(Date(2009, 1, 1)); 244 245 cout << endl; 246 sa1.show(); cout << endl; 247 sa2.show(); cout << endl; 248 ca.show(); cout << endl; 249 cout << "Total:" << Account::getTotal() << endl; 250 return 0; 251 }
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