实验二

任务三源代码：

 1 #include "Complex.h"
 2 #include<iostream>
 3 #include<cmath>
 4 
 5 Complex::Complex(double real, double imag): real{real}, imag{imag} {}
 6 Complex::Complex(const Complex &c): real{c.real}, imag{c.imag} {}
 7 Complex::~Complex() {}
 8 
 9 double Complex::get_real() const {
10     return real;
11 }
12 
13 double Complex::get_imag() const {
14     return imag;
15 }
16 
17 void Complex::show() const {
18     using namespace std;
19     
20     if(imag == 0) {
21         cout << real << endl;
22     }
23     else if(imag > 0) {
24         cout << real << "+" << imag << "i" << endl;
25     }
26     else if(imag < 0) {
27         cout << real << imag << "i" << endl;
28     }
29 }
30 
31 void Complex::add(const Complex &c) {
32     real += c.real;
33     imag += c.imag;
34 }
35 
36 Complex add(const Complex &c1, const Complex &c2) {
37     return Complex(c1.real + c2.real, c1.imag + c2.imag);
38 }
39 
40 bool is_equal(const Complex &c1, const Complex &c2) {
41     if(c1.real == c2.real && c1.imag == c2. imag) {
42         return true;
43     }
44     else {
45         return false;
46     }
47 }
48 
49 double abs(const Complex &c) {
50     return sqrt(c.real * c.real + c.imag * c.imag);
51 }

Complex.cpp

 1 #ifndef Complex_H
 2 
 3 #include<iostream>
 4 #include<cmath>
 5 
 6 class Complex{
 7     public:
 8         Complex(double real = 0.0, double imag = 0.0);
 9         Complex(const Complex &c);
10         ~Complex();
11         
12         double get_real() const;
13         double get_imag() const;
14         
15         void add(const Complex &c);
16         void show() const;
17         
18     friend Complex add(const Complex &c1, const Complex &c2);
19     friend bool is_equal(const Complex &c1, const Complex &c2);
20     friend double abs(const Complex &c);
21         
22     private:
23         double real, imag;
24 };
25 
26 #endif

Complex.h

任务三运行结果：

任务四源代码：

 1 #pragma once
 2 
 3 #include<iostream>
 4 #include<string>
 5 
 6 using namespace std;
 7 
 8 class User {
 9     public:
10         User(string name, string password = "111111", string email = "");
11         
12         void set_email();
13         void change_password();
14         void print_info();
15         
16         static void display_count();    // 类方法，显示当前User类对象数目 
17         
18     private:
19         static int count;    // 类属性，用于描述当前User类对象数目 
20         
21     private:
22         string name, password, email;
23 };
24 
25 int User::count = 0;
26 
27 User::User(string name, string password, string email): name{name}, password{password}, email{email} {
28     ++count;
29 }
30 
31 void User::set_email() {
32     cout << "设置邮箱：" << endl;
33     cin >> email;
34     cout << "邮箱设置成功！" << endl;
35 }
36 
37 void User::change_password() {
38     string newpassword;
39     
40     for(int i = 1; i <= 3; i++) {
41         cout << "请输入旧密码：";
42         cin >> newpassword;
43         if(newpassword == password) {
44             cout << "请输入新密码：";
45             cin >> password;
46             cout << "新密码设置成功！";
47             break;
48         }
49         else {
50             cout << "密码输入错误，请重新输入！";
51         }
52         
53         if(i=4) {
54             cout << "连续三次输入错误，请稍后再试！"; 
55         }
56     }
57     cout << endl;
58 }
59 
60 void User::print_info() {
61     string s(password.size(), '*');
62     cout << "用户名：" << name << endl;
63     cout << "密码：" << s << endl;
64     cout << "邮箱：" << email << endl;
65 }
66 
67 void User::display_count() {
68     cout << "用户总数：" << count << endl;
69 }

User.hpp

 1 #include "User.hpp"
 2 #include<iostream>
 3 
 4 // 测试user类
 5 void test() {
 6     using std::cout;
 7     using std::endl;
 8     
 9     cout << "testing 1......\n";
10     User user1("Jonny", "92197", "xyz@hotmail.com");
11     user1.print_info();
12     
13     cout << endl << "testing 2......\n\n";
14          
15     User user2("Leonard");
16     user2.change_password();
17     user2.set_email();
18     user2.print_info();
19     cout << endl;
20     User::display_count();
21 } 
22 
23 int main() {
24     test();
25 }

task4.cpp

任务四运行结果：

任务五源代码：

 1 #include "account.h"
 2 #include<iostream>
 3 
 4 using namespace std;
 5 
 6 int main() {
 7     // 建立几个账户
 8     SavingAccount sa0(1, 21325302, 0.015);
 9     SavingAccount sa1(1, 58320212, 0.015);
10     // 几笔账目
11     sa0.deposit(5, 5000);
12     sa1.deposit(25, 10000);
13     sa0.deposit(45, 5500);
14     sa1.withdraw(60, 4000);
15     // 开户后第90天到了银行的计息日，结算所有账户的年息
16     sa0.settle(90);
17     sa1.settle(90);
18     // 输出各个账户信息
19     sa0.show();
20     cout << endl;
21     sa1.show();
22     cout << endl;
23     cout << "Total: " << SavingAccount::getTotal() << endl;
24     return 0; 
25 }

5_11.cpp

 1 #include<cmath>
 2 #include<iostream>
 3 #include "account.h"
 4 
 5 using namespace std;
 6 
 7 double SavingAccount::total = 0;
 8 // SavingAccount类相关成员函数的实现
 9 SavingAccount::SavingAccount(int date, int id, double rate): id{id}, balance{0}, rate{rate}, lastDate{date}, accumulation{0} {
10     cout << date << "\t#" << id << "is created" <<endl;
11 } 
12 
13 void SavingAccount::record(int date, double amount) {
14     accumulation = accumulate(date);
15     lastDate = date;
16     amount = floor(amount * 100 + 0.5) / 100;    // 保留小数点后两位
17     balance += amount;
18     total += amount;
19     cout << date << "\t#" << id << "\t" << amount << "\t" << balance << endl; 
20 }
21 
22 void SavingAccount::deposit(int date, double amount) {
23     record(date, amount);
24 }
25 
26 void SavingAccount::withdraw(int date, double amount) {
27     if(amount>getBalance())
28         cout << "Error: not enough money" << endl;
29     else
30         record(date, -amount);
31 }
32 
33 void SavingAccount::settle(int date) {
34     double interest = accumulate(date) * rate / 365;    // 计算年息
35     if(interest != 0)
36         record(date, interest);
37     accumulation = 0; 
38 }
39 
40 void SavingAccount::show() const {
41     cout << "#" << id << "\tBalance" << balance;
42 }

account.cpp

 1 // account.h
 2 #ifndef __ACCOUNT_H__
 3 #define __ACCOUNT_H__
 4 class SavingAccount {    // 储蓄账户类 
 5     private:
 6         int id;    // 账号 
 7         double balance;    // 余额 
 8         double rate;    // 存款的年利率 
 9         int lastDate;    // 上次变更余额的时期 
10         double accumulation;    // 余额按日累加之和 
11         static double total;    // 所有账户的总金额 
12         // 记录一笔账，date为日期，amount为金额，desc为说明 
13         void record(int date, double amount);
14         // 获得到指定日期为止的存款金额按日累计值
15         double accumulate(int date) const {
16             return accumulation + balance * (date - lastDate);
17         } 
18         
19     public:
20         SavingAccount(int date, int id, double rate);
21         int getId() const {return id;}
22         double getBalance() const {return balance;}
23         double getRate() const {return rate;}
24         static double getTotal() {return total;}
25         void deposit(int date, double amount);    // 存入现金
26         void withdraw(int date, double amounr);    // 取出现金
27         // 结算利息，每年1月1日调用一次该函数
28         void settle(int date);
29         // 显示账户信息
30         void show() const; 
31 };
32 #endif // __ACCOUNT_H__

account.h

任务五运行结果：

posted on 2023-10-23 00:06 豪雅阅读(11) 评论(0) 收藏举报