任务3
1.代码
complex.hpp:
1 #ifndef complex_H
2 #define complex_H
3
4 #include <iostream>
5 #include <cmath>
6 using namespace std;
7
8 class Complex
9 {
10 public:
11 Complex(double x=0,double y=0):real{x},imag{y}{}
12 Complex(const Complex &t):real{t.real},imag{t.imag}{}
13 double get_real()const
14 {
15 return real;
16 }
17 double get_imag()const
18 {
19 return imag;
20 }
21 void show()const
22 {
23 if(imag<0)
24 std::cout<<real<<imag<<"i"<<std::endl;
25 if(imag>0)
26 std::cout<<real<<"+"<<imag<<"i"<<std::endl;
27 if(imag==0)
28 std::cout<<real<<std::endl;
29 }
30 double add(const Complex &a)
31 {
32 real+=a.real;
33 imag+=a.imag;
34 }
35
36 friend Complex add(const Complex &p1, const Complex &p2);
37 friend bool is_equal(const Complex &p1, const Complex &p2);
38 friend double abs(const Complex &p1);
39 private:
40 double real,imag;
41 };
42 Complex add(const Complex &p1, const Complex &p2)
43 {
44 Complex x;
45 x.real=p1.real + p2.real;
46 x.imag=p1.imag + p2.imag;
47 return (x);
48 }
49 bool is_equal(const Complex &p1, const Complex &p2)
50 {
51 if((p1.real==p2.real)&&(p1.imag == p2.imag))
52 {
53 return true;
54 }
55 else
56 return false;
57 }
58 double abs(const Complex &p1)
59 {
60 double mo=0;
61 mo=sqrt(p1.real*p1.real+p1.imag*p1.imag);
62 return mo;
63 }
64 void test() {
65 using namespace std;
66 Complex c1(3, -4);
67 const Complex c2(4.5);
68 Complex c3(c1);
69 cout << "c1 = ";
70 c1.show();
71 cout << endl;
72 cout << "c2 = ";
73 c2.show();
74 cout << endl;
75 cout << "c2.imag = " << c2.get_imag() << endl;
76 cout << "c3 = ";
77 c3.show();
78 cout << endl;
79 cout << "abs(c1) = ";
80 cout << abs(c1) << endl;
81 cout << boolalpha;
82 cout << "c1 == c3 : " << is_equal(c1, c3) << endl;
83 cout << "c1 == c2 : " << is_equal(c1, c2) << endl;
84 Complex c4;
85 c4 = add(c1, c2);
86 cout << "c4 = c1 + c2 = ";
87 c4.show();
88 cout << endl;
89 c1.add(c2);
90 cout << "c1 += c2, " << "c1 = ";
91 c1.show();
92 cout << endl;
93 }
94
95 #endif
View Code
main.cpp:
1 #include"complex.hpp"
2 int main() {
3 test();
4 }
View Code
2.图片：
任务4：
1.代码：
user.hpp:
1 #ifndef user_H
2 #define user_H
3
4 #include<iostream>
5 #include<string>
6 #include <vector>
7
8 using namespace std;
9 class User
10 {
11 private:
12 string name;
13 string password;
14 string email;
15 private:
16 static int n;
17 public:
18 static void print_n();
19 public:
20 User(string x,string y="111111",string z=" "):name{x},password{y},email{z}
21 {
22 ++n;
23 }
24 ~User(){--n;
25 }
26 void set_email()
27 {
28 string a;
29 cout<<"Enter email address:";
30 cin>>a;
31 email=a;
32 cout<<"email is set successfully..."<<endl;
33 }
34 void change_passwd()
35 {
36 int count=0;
37 string b,c;
38 cout<<"Enter old passowrd:";
39 cin>>b;
40 while(b!=password)
41 {
42 count++;
43 cout<<"passowrd input error. please re-enter again:";
44 cin>>b;
45 if(count>=2)
46 {
47 cout<<"passowrd input error. please try after a while:"<<endl;
48 break;
49 }
50 }
51 if(b==password)
52 {
53 cout<<"Enter new passowrd:";
54 cin>>c;
55 password=c;
56 cout<<"new password is set successfully..."<<endl;
57
58 }
59 }
60 void print_info()
61 {
62 string s2(password.size(), '*');
63 cout<<"name: "<<name<<endl;
64 cout<<"password: "<<s2<<endl;
65 cout<<"email: "<<email<<endl;
66 }
67
68 };
69
70 int User::n=0;
71 void User::print_n()
72 {
73 std::cout<<"there are"<< n <<"users"<<std::endl;
74 };
75
76
77 #endif
View Code
main.cpp:
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<< "testing 2......\n\n";
11 User user2("Leonard");user2.print_info();
12 user2.change_passwd();
13 user2.set_email();
14 user2.print_info();
15 cout<<endl;
16 User::print_n();
17 }
18 int main() {
19 test();
20 }
View Code
2.图片：
任务5：
1.代码：
1.account.h
1 #ifndef __ACCOUNT_H__
2 #define __ACCOUNT_H__
3
4 class SavingsAccount {
5 private:
6 int id;
7 double balance;
8 double rate;
9 int lastDate;
10 double accumulation;
11 static double total;
12 void record(int date, double amount);
13 double accumulate(int date) const {
14 return accumulation+balance*(date-lastDate);
15 }
16 public:
17 SavingsAccount(int date, int id, double rate);
18 int getId() const {return id;}
19 double getBalance() const {return balance;}
20 double getRate() const {return rate;}
21 static double getTotal() {return total;}
22 void deposit(int date, double amount);
23 void withdraw(int date, double amount);
24 void settle(int date);
25 void show() const;
26 };
27
28 #endif
View Code
2.account.cpp
1 #include<cmath>
2 #include<iostream>
3 using namespace std;
4
5 double SavingsAccount::total = 0;
6 SavingsAccount::SavingsAccount(int date, int id, double rate)
7 :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;
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 > getBalance())
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;
29 if (interest != 0)
30 record(date, interest);
31 accumulation = 0;
32 }
33 void SavingsAccount::show() const {
34 cout << "#" << id << "\tBalance: " << balance;
35 }
View Code
3.main.cpp
1 #include "account.h"
2 #include <iostream>
3 using namespace std;
4 int main() {
5 SavingsAccount sa0(1, 21325302, 0.015);
6 SavingsAccount sa1(1, 58320212, 0.015);
7 sa0.deposit(5, 5000) ;
8 sa1.deposit(25, 10000);
9 sa0.deposit(45, 5500);
10 sa1.withdraw(60, 4000);
11 sa0.settle(90);
12 sa1.settle(90);
13 sa0.show();cout << endl;
14 sa1.show();cout << endl;
15 cout << "Total:" << SavingsAccount::getTotal() << endl;
16 return 0;
17 }
View Code
2.图片：
标签：const,cout,对象,double,void,编程,试验,int,include From： https://www.cnblogs.com/yili123/p/17770803.html