实验四

Task2：

  1 Gradecalc.cpp:
  2 #include <iostream>
  3 #include <vector>
  4 #include <string>
  5 #include <algorithm>
  6 #include <numeric>
  7 #include <iomanip>
  8 
  9 using std::vector;
 10 using std::string;
 11 using std::cin;
 12 using std::cout;
 13 using std::endl;
 14 
 15 class GradeCalc: public vector<int> {
 16 public:
 17     GradeCalc(const string &cname, int size);      
 18     void input();                             // 录入成绩
 19     void output() const;                      // 输出成绩
 20     void sort(bool ascending = false);        // 排序 (默认降序)
 21     int min() const;                          // 返回最低分
 22     int max() const;                          // 返回最高分
 23     float average() const;                    // 返回平均分
 24     void info();                              // 输出课程成绩信息 
 25 
 26 private:
 27     void compute();     // 成绩统计
 28 
 29 private:
 30     string course_name;     // 课程名
 31     int n;                  // 课程人数
 32     vector<int> counts = vector<int>(5, 0);      // 保存各分数段人数（[0, 60), [60, 70), [70, 80), [80, 90), [90, 100]
 33     vector<double> rates = vector<double>(5, 0); // 保存各分数段比例 
 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         this->push_back(grade);
 44     } 
 45 }  
 46 
 47 void GradeCalc::output() const {
 48     for(auto ptr = this->begin(); ptr != this->end(); ++ptr)
 49         cout << *ptr << " ";
 50     cout << endl;
 51 } 
 52 
 53 void GradeCalc::sort(bool ascending) {
 54     if(ascending)
 55         std::sort(this->begin(), this->end());
 56     else
 57         std::sort(this->begin(), this->end(), std::greater<int>());
 58 }  
 59 
 60 int GradeCalc::min() const {
 61     return *std::min_element(this->begin(), this->end());
 62 }  
 63 
 64 int GradeCalc::max() const {
 65     return *std::max_element(this->begin(), this->end());
 66 }    
 67 
 68 float GradeCalc::average() const {
 69     return std::accumulate(this->begin(), this->end(), 0) * 1.0 / n;
 70 }   
 71 
 72 void GradeCalc::compute() {
 73     for(int grade: *this) {
 74         if(grade < 60)
 75             counts.at(0)++;
 76         else if(grade >= 60 && grade < 70)
 77             counts.at(1)++;
 78         else if(grade >= 70 && grade < 80)
 79             counts.at(2)++;
 80         else if(grade >= 80 && grade < 90)
 81             counts.at(3)++;
 82         else if(grade >= 90)
 83             counts.at(4)++;
 84     }
 85 
 86     for(int i = 0; i < rates.size(); ++i)
 87         rates.at(i) = counts.at(i) * 1.0 / n;
 88 }
 89 
 90 void GradeCalc::info()  {
 91     cout << "课程名称:\t" << course_name << endl;
 92     cout << "排序后成绩: \t";
 93     sort();  output();
 94     cout << "最高分:\t" << max() << endl;
 95     cout << "最低分:\t" << min() << endl;
 96     cout << "平均分:\t" << std::fixed << std::setprecision(2) << average() << endl;
 97     
 98     compute();  // 统计各分数段人数、比例
 99 
100     vector<string> tmp{"[0, 60)  ", "[60, 70)", "[70, 80)","[80, 90)", "[90, 100]"};
101     for(int i = tmp.size()-1; i >= 0; --i)
102         cout << tmp[i] << "\t: " << counts[i] << "人\t" 
103              << std::fixed << std::setprecision(2) << rates[i]*100 << "%" << endl; 
104 }
105 task2.hpp:
106 #include "GradeCalc.hpp"
107 #include <iomanip>
108 
109 void test() {
110     int n;
111     cout << "输入班级人数: ";
112     cin >> n;
113 
114     GradeCalc c1("OOP", n);
115 
116     cout << "录入成绩: " << endl;;
117     c1.input();
118     cout << "输出成绩: " << endl;
119     c1.output();
120 
121     cout << string(20, '*') + "课程成绩信息"  + string(20, '*') << endl;
122     c1.info();
123 }
124 
125 int main() {
126     test();
127 }
task2

问题1：

成绩存储在从vector<int>继承而来的容器中；sort方法通过begin()和end()函数就能访问到存储成绩的容器中的每个元素；min方法使用this->begin()和this->end()作为迭代器范围传递给std::min_element函数，以此来遍历存储成绩的容器中的每个元素；max方法与min方法类似；average方法通过this->begin()和this->end()指定要累加的元素范围，也就是存储成绩的容器中的所有成绩元素，然后再除以学生人数n得到平均分；output方法通过一个循环遍历成绩容器。

问题2：

在代码的line68处，分母n的功能是用于计算各分数段人数占总人数的比例；

如果去掉乘以1.0的代码，重新编译和运行，结果会有影响。在原来的代码中，counts.at(i)是int类型，n也是int类型，当进行除法运算counts.at(i) / n时，如果不进行类型转换（乘以1.0就是将其中一个操作数转换为double类型），结果会按照整数除法规则进行计算，即只保留整数部分，小数部分会被截断。

乘以1.0后，会将其中一个操作数隐式转换为double类型，使得除法运算按照浮点数除法规则进行，能得到正确的比例值，保留小数部分，符合统计各分数段比例的需求。

问题3：

在input方法中，没有对用户输入的成绩进行有效性验证。

目前GradeCalc类只考虑了单一课程的成绩统计。在实际应用场景中，可能需要同时处理多门课程的成绩情况。

程序运行结束后，所有输入的成绩数据和计算得到的统计信息都会丢失。

 

 

Task3:

  1 复制代码
  2 #include <iostream>
  3 #include <vector>
  4 #include <string>
  5 #include <algorithm>
  6 #include <numeric>
  7 #include <iomanip>
  8 
  9 using std::vector;
 10 using std::string;
 11 using std::cin;
 12 using std::cout;
 13 using std::endl;
 14 
 15 class GradeCalc {
 16 public:
 17     GradeCalc(const string &cname, int size);      
 18     void input();                             // 录入成绩
 19     void output() const;                      // 输出成绩
 20     void sort(bool ascending = false);        // 排序 (默认降序)
 21     int min() const;                          // 返回最低分
 22     int max() const;                          // 返回最高分
 23     float average() const;                    // 返回平均分
 24     void info();                              // 输出课程成绩信息 
 25 
 26 private:
 27     void compute();     // 成绩统计
 28 
 29 private:
 30     string course_name;     // 课程名
 31     int n;                  // 课程人数
 32     vector<int> grades;     // 课程成绩
 33     vector<int> counts = vector<int>(5, 0);      // 保存各分数段人数（[0, 60), [60, 70), [70, 80), [80, 90), [90, 100]
 34     vector<double> rates = vector<double>(5, 0); // 保存各分数段比例 
 35 };
 36 
 37 GradeCalc::GradeCalc(const string &cname, int size): course_name{cname}, n{size} {}   
 38 
 39 void GradeCalc::input() {
 40     int grade;
 41 
 42     for(int i = 0; i < n; ++i) {
 43         cin >> grade;
 44         grades.push_back(grade);
 45     } 
 46 }  
 47 
 48 void GradeCalc::output() const {
 49     for(int grade: grades)
 50         cout << grade << " ";
 51     cout << endl;
 52 } 
 53 
 54 void GradeCalc::sort(bool ascending) {
 55     if(ascending)
 56         std::sort(grades.begin(), grades.end());
 57     else
 58         std::sort(grades.begin(), grades.end(), std::greater<int>());
 59         
 60 }  
 61 
 62 int GradeCalc::min() const {
 63     return *std::min_element(grades.begin(), grades.end());
 64 }  
 65 
 66 int GradeCalc::max() const {
 67     return *std::max_element(grades.begin(), grades.end());
 68 }    
 69 
 70 float GradeCalc::average() const {
 71     return std::accumulate(grades.begin(), grades.end(), 0) * 1.0 / n;
 72 }   
 73 
 74 void GradeCalc::compute() {
 75     for(int grade: grades) {
 76         if(grade < 60)
 77             counts.at(0)++;
 78         else if(grade >= 60 && grade < 70)
 79             counts.at(1)++;
 80         else if(grade >= 70 && grade < 80)
 81             counts.at(2)++;
 82         else if(grade >= 80 && grade < 90)
 83             counts.at(3)++;
 84         else if(grade >= 90)
 85             counts.at(4)++;
 86     }
 87 
 88     for(int i = 0; i < rates.size(); ++i)
 89         rates.at(i) = counts.at(i) *1.0 / n;
 90 }
 91 
 92 void GradeCalc::info()  {
 93     cout << "课程名称:\t" << course_name << endl;
 94     cout << "排序后成绩: \t";
 95     sort();  output();
 96     cout << "最高分:\t" << max() << endl;
 97     cout << "最低分:\t" << min() << endl;
 98     cout << "平均分:\t" << std::fixed << std::setprecision(2) << average() << endl;
 99     
100     compute();  // 统计各分数段人数、比例
101 
102     vector<string> tmp{"[0, 60)  ", "[60, 70)", "[70, 80)","[80, 90)", "[90, 100]"};
103     for(int i = tmp.size()-1; i >= 0; --i)
104         cout << tmp[i] << "\t: " << counts[i] << "人\t" 
105              << std::fixed << std::setprecision(2) << rates[i]*100 << "%" << endl; 
106 }
View Code
 1 #include "GradeCalc.hpp"
 2 #include <iomanip>
 3 
 4 void test() {
 5     int n;
 6     cout << "输入班级人数: ";
 7     cin >> n;
 8 
 9     GradeCalc c1("OOP", n);
10 
11     cout << "录入成绩: " << endl;;
12     c1.input();
13     cout << "输出成绩: " << endl;
14     c1.output();
15 
16     cout << string(20, '*') + "课程成绩信息"  + string(20, '*') << endl;
17     c1.info();
18 }
19 
20 int main() {
21     test();
22 }
View Code

问题1:成绩存储在std::vector<int>这个容器中。min、max、sort、average、output是通过std::vector<int>提供的迭代器接口访问每个成绩。

问题2:类的私有成员变量（如grades、counts、rates等）被隐藏在类的内部，外部代码无法直接访问和修改这些数据，只能通过类提供的公有方法来间接操作。这样可以保证数据的安全性和一致性，防止外部代码无意或恶意地篡改数据，使得程序的行为更加可预测和稳定。

 

Task4.1:

 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: 从输入流读取字符串, 碰到空白符(空格/回车/Tab)即结束
10     cout << "s1: " << s1 << endl;
11     cout << "s2: " << s2 << endl;
12 }
13 
14 void test2() {
15     string s1, s2;
16     getline(cin, s1);  // getline(): 从输入流中提取字符串，直到遇到换行符
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, ' '); //从输入流中提取字符串，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 << "测试1: 使用标准输入流对象cin输入字符串" << endl;
32     test1();
33     cout << endl;
34 
35     cin.ignore(numeric_limits<streamsize>::max(), '\n');
36 
37     cout << "测试2: 使用函数getline()输入字符串" << endl;
38     test2();
39     cout << endl;
40 
41     cout << "测试3: 使用函数getline()输入字符串, 指定字符串分隔符" << endl;
42     test3();
43 }
1

问题1：

清空输入缓冲区中剩余的字符，特别是换行符等可能影响后续getline函数正确读取的字符。
 
Task4.2:
 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 << "测试: 使用cin多组输入字符串" << endl;
32     test();
33 }
2

 

Task4.3:

 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 << "测试: 使用函数getline()多组输入字符串" << endl;
33     test();
34 }
3

问题2：清空输入缓冲区中剩余的字符，特别是在通过cin >> n读取完整数n后，将可能留在输入缓冲区中的换行符（以及其他可能残留的字符）清除掉。、

 

Task5:

 1 #ifndef GRM_HPP
 2 #define GRM_HPP
 3 
 4 template <typename T>
 5 class GameResourceManager {
 6 private:
 7     T resource;
 8 
 9 public:
10     // 带参数的构造函数，初始化当前资源数量
11     GameResourceManager(T initialResource) : resource(initialResource) {}
12 
13     // 获取当前的资源数量
14     T get() const {
15         return resource;
16     }
17 
18     // 更新当前的资源数量（增加、减少）
19     // 当资源数量减少到<0时，则归0
20     void update(T change) {
21         resource += change;
22         if (resource < 0) {
23             resource = 0;
24         }
25     }
26 };
27 
28 #endif
grm.hpp
 1 #include "grm.hpp"
 2 #include <iostream>
 3 
 4 using std::cout;
 5 using std::endl;
 6 
 7 void test1() {
 8     GameResourceManager<float> HP_manager(99.99);
 9     cout << "当前生命值: " << HP_manager.get() << endl;
10     HP_manager.update(9.99);
11     cout << "增加9.99生命值后, 当前生命值: " << HP_manager.get() << endl;
12     HP_manager.update(-999.99);
13     cout <<"减少999.99生命值后, 当前生命值: " << HP_manager.get() << endl;
14 }
15 
16 void test2() {
17     GameResourceManager<int> Gold_manager(100);
18     cout << "当前金币数量: " << Gold_manager.get() << endl;
19     Gold_manager.update(50);
20     cout << "增加50个金币后, 当前金币数量: " << Gold_manager.get() << endl;
21     Gold_manager.update(-99);
22     cout <<"减少99个金币后, 当前金币数量: " << Gold_manager.get() << endl;
23 }
24 
25 
26 int main() {
27     cout << "测试1: 用float类型对类模板GameResourceManager实例化" << endl;
28     test1();
29     cout << endl;
30 
31     cout << "测试2: 用int类型对类模板GameResourceManager实例化" << endl;
32     test2();
33 }
task5.cpp

 

Task6:

 1 #pragma once
 2 #include <iostream>
 3 using namespace std;
 4 class info {
 5 private:
 6     string nickname;
 7     string contact;
 8     string city;
 9     int n;
10 public:
11     info(string nickname, string contact, string city, int n) {
12         this->nickname = nickname;
13         this->contact = contact;
14         this->city = city;
15         this->n = n;
16     }
17     void display() {
18         cout << "昵称：    " << nickname << endl;
19         cout << "联系方式：" << contact << endl;
20         cout << "所在城市：" << city << endl;
21         cout << "预定人数：" << n << endl;
22         cout << string(70, '-') << endl;
23     }
24 };
info
 1 #include"info.hpp"
 2 #include <vector>
 3 using namespace std;
 4 int main() {
 5     const int capacity = 100;
 6     vector<info>audience_lst;
 7     int capacity1 = 0;
 8     string nickname;
 9     string contact;
10     string city;
11     int n;
12     cout << "昵称" + string(5, ' ') + "联系方式（邮箱/手机号）" + string(5, ' ') + "所在城市" + string(5, ' ') + "预定参加人数\n";
13     while (cin >> nickname>>contact>>city>>n) {
14         cin.ignore(numeric_limits<streamsize>::max(), '\n');
15         capacity1 += n;
16         if (capacity1 > capacity) {
17             capacity1 -= n;
18             string choose;
19             cout << "对不起，只剩下" << capacity - capacity1 << "个位置.\n"
20                 << "1.输入u，更新（update）预定信息\n"
21                 << "2.输入q，退出预定\n"
22                 << "你的选择：";
23             cin >> choose;
24             if (choose == "u") {
25                 cout << "请重新输入预定信息：\n";
26                 continue;
27             }
28             else
29             {
30                 break;
31             }
32         }
33         info livehouse(nickname, contact, city, n);
34         audience_lst.push_back(livehouse);
35         if (capacity1 == capacity) { break; }
36     }
37     cout << "截至目前，一共有" << capacity1 << "位听众预约。预约听众的信息如下：\n";
38     cout << string(70, '-') << endl;
39     for (auto& i : audience_lst) {
40         i.display();
41     }
42     return 0;
43 }
View Code

 

 

Task7:

 1 #ifndef __DATE_H__
 2 #define __DATE_H__
 3 
 4 class Date {
 5 private:
 6     int year;    //年
 7     int month;   //月
 8     int day;     //日
 9     int totalDays; //该日期是从公元元年1月1日开始的第几天
10 public:
11     Date(int year, int month, int day); //用年、月、日构造日期
12     int getYear() const { return year; }
13     int getMonth() const { return month; }
14     int getDay() const { return day; }
15     int getMaxDay() const;
16     bool isLeapYear() const {
17         return year % 4 == 0 && year % 100 != 0 || year % 400 == 0;
18     }
19     void show() const;
20     //计算两个日期之间相差多少天
21     int distance(const Date& date) const {
22         return totalDays - date.totalDays;
23     }
24 };
25 #endif
date.h
#include "date.h"
#include <iostream>
#include <cstdlib>
using namespace std;

//命名空间使下面的定义只在当前文件中有效
namespace {
    //存储平年中的某个月1日之前有多少天，为便于getMaxDay函数的实现，该数组多出一项
    const int DAYS_BEFORE_MONTH[] = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365 };
}

Date::Date(int year, int month, int day) : year(year), month(month), day(day) {
    if (day <= 0 || day > getMaxDay()) {
        cout << "Invalid date.";
        show();
        cout << endl;
        exit(1);
    }
    int years = year - 1;
    totalDays = years * 365 + years / 4 - years / 100 + years / 400
        + DAYS_BEFORE_MONTH[month - 1] + day;
    if (isLeapYear() && month > 2) totalDays++;
}


int Date::getMaxDay()const {
    if (isLeapYear() && month == 2) {
        return 29;
    }
    else {
        return DAYS_BEFORE_MONTH[month] - DAYS_BEFORE_MONTH[month - 1];
    }
}

void Date::show() const {
    cout << getYear() << '-' << getMonth() << '-' << getDay();
}
date.cpp
 1 #ifndef _ACCUMULATOR_H_
 2 #define _ACCUMULATOR_H_
 3 #include "date.h"
 4 class Accumulator {
 5 private:
 6     Date lastDate;
 7     double value;
 8     double sum;
 9 public:
10     Accumulator(const Date& date, double value):lastDate(date),value(value),sum(0){ }
11     double getSum(const Date& date) const {
12         return sum + value * date.distance(lastDate);
13     }
14     void change(const Date& date, double value) {
15         sum = getSum(date);
16         lastDate = date;
17         this->value = value;
18     }
19     void reset(const Date& date, double value) {
20         lastDate = date;
21         this->value = value;
22         sum = 0;
23     }
24 };
25 #endif
accumulator.h
 1 #ifndef _ACCOUNT_H_
 2 #define _ACCOUNT_H_
 3 #include "date.h"
 4 #include "accumulator.h"
 5 #include <string>
 6 class Account {
 7 private:
 8     std::string id;
 9     double balance;
10     static double total;
11 protected:
12     Account(const Date& date, const std::string& id);
13     void error(const std::string& msg) const;
14     void record(const Date& data, double amount,const std::string& desc);
15 public:
16     const std::string& getId() const { return id; }
17     double getBalance() const { return balance; }
18     static double getTotal() { return total; }
19     void show() const;
20 };
21 class SavingsAccount : public Account {
22 private:
23     Accumulator acc;
24     double rate;
25 public:
26     SavingsAccount(const Date& date, const std::string& id, double rate);
27     double getRate() const { return rate; }
28     void deposit(const Date& date, double amount, const std::string& desc);
29     void withdraw(const Date& date, double amount, const std::string& desc);
30     void settle(const Date& date);
31 };
32 class CreditAccount : public Account {
33 private:
34     Accumulator acc;
35     double credit;
36     double rate;
37     double fee;
38     double getDebt()const {
39         double balance = getBalance();
40         return (balance < 0 ? balance : 0);
41     }
42 public:
43     CreditAccount(const Date& date, const std::string& id, double credit, double rate, double fee);
44     double getCredit() const { return credit; }
45     double getRate() const { return rate; }
46     double getFee() const { return fee; }
47     double getAvailableCredit() const { return credit; }
48     void deposit(const Date& date, double amount, const std::string& desc);
49     void withdraw(const Date& date, double amount, const std::string& desc);
50     void settle(const Date& date);
51     void show() const;
52 };
53 #endif
acount.h
 1 #include "account.h"
 2 #include <iostream>
 3 #include <cmath>
 4 using namespace std;
 5 double Account::total = 0;
 6 
 7 // Account类的实现
 8 Account::Account(const Date& date, const string& id) : id(id), balance(0) {
 9     date.show();
10     cout << "\t#" << id << " created" << endl;
11 }
12 
13 void Account::record(const Date& date, double amount, const string& desc) {
14     amount = floor(amount * 100 + 0.5) / 100;
15     balance += amount;total += amount;
16     date.show();
17     cout << "\t#" << id << "\t" << amount << "\t" << balance << "\t" << desc << endl;
18 }
19 
20 void Account::show() const {
21     cout << id << "\tBalance: " << balance;
22 }
23 
24 void Account::error(const string& msg) const {
25     cout << "Error(#" << id << "): " << msg << endl;
26 }
27 
28 // SavingsAccount类相关成员函数的实现
29 SavingsAccount::SavingsAccount(const Date& date, const string& id, double rate) :
30     Account(date, id), rate(rate), acc(date, 0) {}
31 
32 void SavingsAccount::deposit(const Date& date, double amount, const string& desc) {
33     record(date, amount, desc);
34     acc.change(date, getBalance());
35 }
36 
37 void SavingsAccount::withdraw(const Date& date, double amount, const string& desc) {
38     if (amount > getBalance()) {
39         error("not enough money");
40     }
41     else {
42         record(date, -amount, desc);
43         acc.change(date, getBalance());
44     }
45 }
46 
47 void SavingsAccount::settle(const Date& date) {
48     double interest = acc.getSum(date) * rate/date.distance(Date(date.getYear()-1,1,1));
49     if (interest != 0)
50         record(date, interest, "interest");
51     acc.reset(date, getBalance());
52 }
53 
54 // CreditAccount类相关成员函数的实现
55 CreditAccount::CreditAccount(const Date& date, const string& id, double credit, double rate, double fee) :
56     Account(date, id), credit(credit), rate(rate), fee(fee), acc(date, 0) {}
57 
58 
59 void CreditAccount::deposit(const Date& date, double amount, const string& desc) {
60     record(date, amount, desc);
61     acc.change(date, getDebt());
62 }
account.cpp
 1 #include "account.h"
 2 #include <iostream>
 3 using namespace std;
 4 
 5 int main() {
 6     Date date(2008, 11, 1);
 7 
 8     SavingsAccount sa1(date, "S3755217", 0.015);
 9     SavingsAccount sa2(date, "02342342", 0.015);
10     CreditAccount ca(date, "C5392394", 10000, 0.0005, 50);
11 
12     sa1.deposit(Date(2008, 11, 5), 5000, "salary");
13     ca.withdraw(Date(2008, 11, 15), 2000, "buy a cell");
14     sa2.deposit(Date(2008, 11, 25), 10000, "sell stock 0323");
15 
16     ca.settle(Date(2008, 12, 1));
17 
18     ca.deposit(Date(2008, 12, 1), 2016, "repay the credit");
19     sa1.deposit(Date(2008, 12, 5), 5500, "salary");
20 
21     sa1.settle(Date(2009, 1, 1));
22     sa2.settle(Date(2009, 1, 1));
23     ca.settle(Date(2009, 1, 1));
24 
25     cout << endl;
26     sa1.show(); cout << endl;
27     sa2.show(); cout << endl;
28     ca.show(); cout << endl;
29     cout << "Total: " << Account::getTotal() << endl;
30     return 0;
31 }
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posted @ 2024-11-24 19:19  瑞思白  阅读(19)  评论(0)    收藏  举报