实验任务三
1 #include <iostream>
2 #include <cmath>
3
4 class Complex {
5
6 private:
7 double real;
8 double imag;
9
10 public:
11 Complex(double r = 0, double i = 0) {
12 real = r;
13 imag = i;
14 }
15
16 Complex(const Complex& x) {
17 real = x.real;
18 imag = x.imag;
19 }
20
21 double get_real() const { return real; }
22 double get_imag() const { return imag; }
23
24 void add(const Complex& x) {
25 real += x.real;
26 imag += x.imag;
27 }
28
29 void show() const {
30 using namespace std;
31 if (real == 0 && imag == 0) { cout << 0; }
32 else if (real == 0) { cout <<"0+"<< imag << "i"; }
33 else if (imag == 0) { cout << real; }
34 else {
35 if (imag > 0) {
36 cout << real << " + " << imag << "i";
37 }
38 else if (imag < 0) {
39 cout << real << " - " << -imag << "i";
40 }
41 }
42 }
43
44 friend Complex add(const Complex& c1, const Complex& c2);
45 friend bool is_equal(const Complex& c1, const Complex& c2);
46 friend double abs(const Complex& c1);
47 };
48
49 Complex add(const Complex& c1, const Complex& c2) {
50 double real = c1.real + c2.real;
51 double imag = c1.imag + c2.imag;
52 return Complex(real, imag);
53 }
54 double abs(const Complex& c1) {
55 return sqrt(c1.real * c1.real + c1.imag * c1.imag);
56 }
57
58 bool is_equal(const Complex& c1, const Complex& c2) {
59 if (c1.real == c2.real && c1.imag == c2.imag)
60 return true;
61 else
62 return false;
63 }
complex.hpp
1 #include "Complex.hpp"
2 void test() {
3 using namespace std;
4
5 Complex c1(3, -4);
6 const Complex c2(4.5);
7 Complex c3(c1);
8
9 cout << "c1 = ";
10 c1.show();
11 cout << endl;
12
13 cout << "c2 = ";
14 c2.show();
15 cout << endl;
16 cout << "c2.imag = " << c2.get_imag() << endl;
17
18 cout << "c3 = ";
19 c3.show();
20 cout << endl;
21
22 cout << "abs(c1) = ";
23 cout << abs(c1) << endl;
24
25 cout << boolalpha;
26 cout << "c1 == c3 : " << is_equal(c1, c3) << endl;
27 cout << "c1 == c2 : " << is_equal(c1, c2) << endl;
28
29 Complex c4;
30 c4 = add(c1, c2);
31 cout << "c4 = c1 + c2 = ";
32 c4.show();
33 cout << endl;
34
35 c1.add(c2);
36 cout << "c1 += c2, " << "c1 = ";
37 c1.show();
38 cout << endl;
39 }
40
41 int main() {
42 test();
43 }
main.cpp
实验任务四
1 #pragma once
2 #include<iostream>
3 #include<string>
4 using namespace std;
5
6 class User {
7 public:
8 User(string name, string passwd = "111111", string email = " ") : UserName{ name }, Password{ passwd }, Email{ email } { NumUsers++; }
9 ~User() = default;
10
11 void set_email();
12 void change_passwd();
13 void print_info();
14 static void print_n();
15
16 private:
17 string UserName, Password, Email;
18 static int NumUsers;
19 };
20
21 int User::NumUsers = 0;
22
23 void User::set_email()
24 {
25 cout << "Enter email address: ";
26 cin >> Email;
27 cout << "Email is set successfully..." << endl;
28 }
29
30 void User::change_passwd()
31 {
32 string OldPassword;
33 int RemainingTries = 3;
34 while (RemainingTries)
35 {
36 cout << "Enter old password: ";
37 cin >> OldPassword;
38 if (OldPassword == Password)
39 {
40 cout << "Enter new password: ";
41 string NewPassword;
42 cin >> NewPassword;
43 cout << "New password is set successfully..." << endl;
44 Password = NewPassword;
45 break;
46 }
47 else
48 {
49 RemainingTries--;
50 if (RemainingTries != 0)
51 cout << "Password input error. Please re-enter again: ";
52 }
53 if (RemainingTries == 0)
54 {
55 cout << "Password input error. Please try after a while." << endl;
56 }
57 }
58 }
59
60 void User::print_info()
61 {
62 string StarPassword(Password.size(), '*');
63 cout << "Name: " << UserName << endl;
64 cout << "Password: " << StarPassword << endl;
65 cout << "Email: " << Email << endl;
66 }
67
68 void User::print_n()
69 {
70 cout << "There are " << NumUsers << " users." << endl;
71 }
user.hpp
1 #include "User.hpp"
2 #include <iostream>
3 // 测试User类
4 void test() {
5 using std::cout;
6 using std::endl;
7 cout << "testing 1......\n";
8 User user1("Jonny", "92197", "[email protected]");
9 user1.print_info();
10 cout << endl
11 << "testing 2......\n\n";
12 User user2("Leonard");
13 user2.change_passwd();
14 user2.set_email();
15 user2.print_info();
16 cout << endl;
17 User::print_n();
18 }
19 int main() {
20 test();
21 }
main.cpp
任务实验五
1 class SavingsAccount {
2 public:
3 // ... 其他函数 ...
4
5 // 构造函数
6 SavingsAccount(int date, int id, double rate) {
7 this->id = id;
8 this->balance = 0.0;
9 this->rate = rate;
10 this->lastDate = date;
11 this->accumulation = 0.0;
12 }
13
14 // 记录一笔账
15 void record(int date, double amount) {
16 lastDate = date;
17 balance += amount;
18 accumulation += amount;
19 total += amount; // 更新total here
20 }
21
22 // 存入现金
23 void deposit(int date, double amount) {
24 if (amount > 0) {
25 record(date, amount);
26 std::cout << "Deposited: " << amount << " on " << date << std::endl;
27 total += amount; // 更新total here
28 }
29 }
30
31 // 取出现金
32 void withdraw(int date, double amount) {
33 if (amount > 0 && amount <= balance) {
34 record(date, -amount);
35 std::cout << "Withdrew: " << amount << " on " << date << std::endl;
36 total -= amount; // 更新total here
37 } else {
38 std::cout << "Insufficient funds!" << std::endl;
39 }
40 }
41
42 // 结算利息
43 void settle(int date) {
44 double interest = balance * rate / 365 * (date - lastDate); // assuming simple interest here
45 balance += interest;
46 accumulation += interest;
47 total += interest; // 更新total here
48 lastDate = date; // update the lastDate to current date after settlement
49 }
50
51 // 显示账户信息
52 void show() const {
53 std::cout << "Account ID: " << id << std::endl;
54 std::cout << "Balance: " << balance << std::endl;
55 std::cout << "Rate: " << rate << std::endl;
56 std::cout << "Last Date: " << lastDate << std::endl;
57 std::cout << "Accumulation: " << accumulation << std::endl;
58 std::cout << "Total: " << total << std::endl; // Add total to the output here
59 }
60
61 private:
62 double total; // Declare total here
63 // ... 其他变量 ...
64 };
account.hpp
1 #include "account.h"
2 #include <cmath>
3 #include <iostream>
4 using namespace std;
5
6 double SavingsAccount::total = 0;
7 SavingsAccount::SavingsAccount(int date, int id, double rate):id(id), balance(0), rate(rate), lastDate(date), accumulation(0){
8 cout << date << "\t#" << id << "is created" << endl;
9 }
10 void SavingsAccount::record(int date, double amount){
11 accumulation = accumulate(date);
12 lastDate = date;
13 amount = floor(amount * 100 + 0.5) / 100; //保留小数点后两位
14 balance += amount;
15 total += amount;
16 cout << date << "\t#" << id << "\t" << amount << "\t" << balance <<endl;
17 }
18 void SavingsAccount::deposit(int date, double amount) {
19 record(date, amount);
20 }
21 void SavingsAccount::withdraw(int date, double amount){
22 if (amount > getBlance())
23 cout << "Error: not enough money" << endl;
24 else
25 record(date, -amount);
26 }
27 void SavingsAccount::settle(int date){
28 double interest = accumulate(date) * rate/365; //计算年息
29 if (interest != 0)
30 record(date, interest);
31 accumulation = 0;
32 }
33 void SavingsAccount::show() const {
34 cout << "#" << id << "\tBlance:" << balance;
35 }
main.cpp
标签：real,cout,对象,double,void,Complex,实验,include From： https://www.cnblogs.com/8716ydc/p/17781365.html