task1
t.hpp
1 #pragma once
2 #include <iostream>
3 #include <string>
4 using namespace std;
5
6 class T {
7 public:
8 T(int x = 0, int y = 0);
9 T(const T &t);
10 T(T &&t);
11 ~T();
12 void set_m1(int x);
13 int get_m1() const;
14 int get_m2() const;
15 void display() const;
16 friend void func();
17 private:
18 int m1, m2;
19 public:
20 static void disply_count();
21 public:
22 static const string doc;
23 static const int max_count;
24 private:
25 static int count;
26 };
27
28 const string T::doc{"a simple class"};
29 const int T::max_count = 99;
30 int T::count = 0;
31
32 T::T(int x, int y): m1{x}, m2{y} {
33 ++count;
34 cout << "constructor called.\n";
35 }
36 T::T(const T &t): m1{t.m1}, m2{t.m2} {
37 ++count;
38 cout << "copy constructor called.\n";
39 }
40 T::T(T &&t): m1{t.m1}, m2{t.m2} {
41 ++count;
42 cout << "move constructor called.\n";
43 }
44 T::~T() {
45 --count;
46 cout << "destructor called.\n";
47 }
48 void T::set_m1(int x) {
49 m1 = x;
50 }
51 int T::get_m1() const {
52 return m1;
53 }
54 int T::get_m2() const {
55 return m2;
56 }
57 void T::display() const {
58 cout << m1 << ", " << m2 << endl;
59 }
60
61 void T::disply_count() {
62 cout << "T objects: " << count << endl;
63 }
64 void func() {
65 T t1;
66 t1.set_m1(55);
67 t1.m2 = 77;
68 t1.display();
69 }
View Code
main.cpp
1 #include "t.hpp"
2
3 void test() {
4 cout << "T class info: " << T::doc << endl;
5 cout << "T objects max_count: " << T::max_count << endl;
6 T::disply_count();
7 T t1;
8 t1.display();
9 t1.set_m1(42);
10 T t2{t1};
11 t2.display();
12 T t3{std::move(t1)};
13 t3.display();
14 t1.display();
15 T::disply_count();
16 }
17
18 int main() {
19 cout << "============测试类T============" << endl;
20 test();
21 cout << endl;
22 cout << "============测试友元函数func()============" << endl;
23 func();
24 }
View Code
运行结果截图
task2
employee.hpp
1 #pragma once
2
3 #include <iostream>
4 #include <string>
5 #include <iomanip>
6 using std::string;
7 using std::cout;
8 using std::endl;
9 using std::setfill;
10 using std::setw;
11 using std::left;
12 using std::right;
13 using std::to_string;
14 struct Date {
15 int year;
16 int month;
17 int day;
18 };
19
20 class Employee
21 {
22 public:
23 Employee();
24 Employee(string name0, double salary0, int y, int m, int d = 1);
25 void set_info(string name0, double salary0, int y, int m, int d = 1);
26
27 string get_name() const;
28 double get_salary() const;
29 void display_info() const;
30 void update_salary(double s);
31 void update_hire_date(int y, int m, int d);
32 void raise_salary(double by_percent);
33 public:
34 static void display_count();
35 private:
36 string id;
37 string name;
38 double salary;
39 Date hire_date;
40 public:
41 static const string doc;
42 private:
43 static int count;
44 };
45 const string Employee::doc {"a simple Employee class"};
46 int Employee::count = 0;
47
48 Employee::Employee(): id{ to_string(count+1) } {
49 ++count;
50 }
51
52 Employee::Employee(string name0, double salary0, int y, int m, int d):
53 id{to_string(count+1)}, name{name0}, salary{salary0},
54 hire_date{y, m, d} {
55 ++count;
56 }
57
58 void Employee::set_info(string name0, double salary0, int y, int m, int d)
59 {
60 name = name0;
61 salary = salary0;
62 hire_date.year = y;
63 hire_date.month = m;
64 hire_date.day = d;
65 }
66
67 string Employee::get_name() const {
68 return name;
69 }
70
71 double Employee::get_salary() const {
72 return salary;
73 }
74
75 void Employee::display_info() const {
76 cout << left << setw(15) << "id: " << id << endl;
77 cout << setw(15) << "name: " << name << endl;
78 cout << setw(15) << "salary: " << salary << endl;
79 cout << setw(15) << "hire_date: " << hire_date.year << "-";
80 cout << std::right << setfill('0') << setw(2) << hire_date.month << "-"
81 << setw(2) << hire_date.day;
82 cout << setfill(' ');
83 }
84
85 void Employee::update_salary(double s) {
86 salary = s;
87 }
88
89 void Employee::update_hire_date(int y, int m, int d) {
90 hire_date.year = y;
91 hire_date.month = m;
92 hire_date.day = d;
93 }
94
95 void Employee::raise_salary(double by_percent) {
96 double raise = salary * by_percent / 100;
97 salary += raise;
98 }
99
100 void Employee::display_count() {
101 cout << "there are " << count << " employees\n";
102 }
View Code
main.cpp
1 #include "Employee.hpp"
2 #include <iostream>
3
4 void test() {
5 using std::cout;
6 using std::endl;
7 cout << Employee::doc << endl << endl;
8 Employee employee1;
9 employee1.set_info("Sam", 30000, 2015, 1, 6);
10 employee1.update_hire_date(2019, 6, 30);
11 employee1.update_salary(35000);
12 employee1.display_info();
13 cout << endl << endl;
14 Employee employee2{"Tony", 20000, 2023, 3, 16};
15 employee2.raise_salary(15);
16 employee2.display_info();
17 cout << endl << endl;
18 Employee::display_count();
19 }
20 int main() {
21 test();
22 }
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运行结果截图
task3
Complex.hpp
1 #ifndef COMPLEX_HPP
2 #define COMPLEX_HPP
3
4 #include<iostream>
5 #include<cmath>
6
7 using namespace std;
8
9 class Complex {
10 private:
11 double real;
12 double imag;
13 public:
14 Complex();
15 Complex(double real0);
16 Complex(double real0,double imag0);
17 Complex(const Complex &obj);
18
19 double get_real()const;
20 double get_imag()const;
21 void show()const;
22 void add(const Complex &obj);
23
24 friend Complex add(Complex obj1,Complex obj2);
25 friend bool is_equal(const Complex &obj1,const Complex &obj2);
26 friend double abs(const Complex &obj);
27 };
28
29 Complex::Complex() {
30 real=imag=0;
31 }
32 Complex::Complex(double real0) {
33 real=real0;
34 imag=0;
35 }
36 Complex::Complex(double real0,double imag0) {
37 real=real0;
38 imag=imag0;
39 }
40 Complex::Complex(const Complex &obj) {
41 real=obj.real;
42 imag=obj.imag;
43 }
44
45 double Complex::get_real()const {
46 return real;
47 }
48 double Complex::get_imag()const {
49 return imag;
50 }
51 void Complex::show()const {
52 if(imag!=0)
53 cout<<real<<imag<<"i";
54 else
55 cout<<real;
56 }
57 void Complex::add(const Complex &obj) {
58 real=real+obj.real;
59 imag=imag+obj.imag;
60 }
61
62 Complex add(Complex obj1,Complex obj2) {
63 obj1.real=obj1.real+obj2.real;
64 obj1.imag=obj1.imag+obj2.imag;
65 return obj1;
66 }
67 bool is_equal(const Complex &obj1,const Complex &obj2) {
68 if(obj1.real==obj2.real&&obj1.imag==obj2.imag) return true;
69 else return false;
70 }
71 double abs(const Complex &obj) {
72 return sqrt(pow(obj.real,2)+pow(obj.imag,2));
73 }
74
75 #endif
View Code
Complex.cpp
1 #include"Complex.hpp"
2 #include<iostream>
3 int main() {
4 using namespace std;
5
6 Complex c1(3, -4);
7 const Complex c2(4.5);
8 Complex c3(c1);
9
10 cout << "c1 = ";
11 c1.show();
12 cout << endl;
13
14 cout << "c2 = ";
15 c2.show();
16 cout << endl;
17 cout << "c2.imag = " << c2.get_imag() << endl;
18
19 cout << "c3 = ";
20 c3.show();
21 cout << endl;
22
23 cout << "abs(c1) = ";
24 cout << abs(c1) << endl;
25
26 cout << boolalpha;
27 cout << "c1 == c3 : " << is_equal(c1, c3) << endl;
28 cout << "c1 == c2 : " << is_equal(c1, c2) << endl;
29
30 Complex c4;
31 c4 = add(c1, c2);
32 cout << "c4 = c1 + c2 = ";
33 c4.show();
34 cout << endl;
35
36 c1.add(c2);
37 cout << "c1 += c2, " << "c1 = ";
38 c1.show();
39 cout << endl;
40 }
View Code
运行结果截图
task4 User.hpp
1 #ifndef USER_HPP
2 #define USER_HPP
3
4 #include<iostream>
5 #include<string>
6
7 using namespace std;
8
9 class User {
10 private:
11 string name;
12 string passwd;
13 string email;
14 static int n;
15 public:
16 User(string name0);
17 User(string name0,string passwd0,string email0);
18 void change_passwd();
19 void set_email();
20 void print_info();
21 static void print_n();
22 };
23
24 int User::n=0;
25
26 User::User(string name0) {
27 name=name0;
28 passwd="12345";
29 email="";
30 n++;
31 }
32 User::User(string name0,string passwd0,string email0) {
33 name=name0;
34 passwd=passwd0;
35 email=email0;
36 n++;
37 }
38
39 void User::set_email() {
40 cout<<"Enter email address: ";
41 cin>>email;
42 cout<<"email is set successfully..."<<endl;
43 }
44 void User::change_passwd() {
45 cout<<"Enter old password: ";
46 string s;
47 cin>>s;
48 int i;
49 for(i=1; i<=2; i++) {
50 if(s==passwd) break;
51 cout<<"password input error.Please re-enter again: ";
52 cin>>s;
53 }
54 if(s!=passwd) cout<<"password input error. Please try after a while."<<endl;
55 else {
56 cout<<"Enter new passwd: ";
57 cin>>s;
58 passwd=s;
59 cout<<"new passwd is set successfully..."<<endl;
60 }
61 }
62
63 void User::print_info() {
64 cout<<"name: "<<name<<endl;
65 cout<<"passwd: "<<"******"<<endl;
66 cout<<"email: "<<email<<endl;
67 }
68
69 void User::print_n() {
70 cout<<"there are "<<n<<" users."<<endl;
71 }
72
73 #endif
View Code
task4.cpp
1 #include "User.hpp"
2 #include <iostream>
3
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 }
View Code
运行结果截图
task5 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 data,double amount);
13 double accumulate(int date)const
14 {
15 return accumulation+balance*(date-lastDate);
16 }
17 public:
18 SavingsAccount(int data,int id,double rate);
19 int getId()const{return id;}
20 double getBalance()const{return balance;}
21 double getRate()const{return rate;}
22 static double getTotal(){return total;}
23 void deposit(int date,double amount);
24 void withdraw(int data,double amount);
25 void settle(int date);
26 void show() const;
27 };
28 #endif
View Code
account.cpp
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 {
9 cout<<date<<"\t#"<<id<<"is created"<<endl;
10 }
11 void SavingsAccount::record(int date,double amount)
12 {
13 accumulation=accumulate(date);
14 lastDate=date;
15 amount=floor(amount*100+0.5)/100;
16 balance+=amount;
17 total+=amount;
18 cout<<date<<"\t#"<<id<<"\t"<<amount<<"\t"<<balance<<endl;
19 }
20 void SavingsAccount::deposit(int date,double amount)
21 {
22 record(date,amount);
23 }
24 void SavingsAccount::withdraw(int date,double amount)
25 {
26 if(amount>getBalance())
27 cout<<"Error:not enough money"<<endl;
28 else
29 record(date,-amount);
30 }
31 void SavingsAccount::settle(int data)
32 {
33 double interest=accumulate(data)*rate/365;
34 if(interest!=0)
35 record(data,interest);
36 accumulation=0;
37 }
38 void SavingsAccount::show() const
39 {
40 cout<<"#"<<id<<"\tBalance:"<<balance;
41 }
View Code
5_11.cpp
1 #include "account.h"
2 #include <iostream>
3 using namespace std;
4
5 int main() {
6 SavingsAccount sa0(1, 21325302, 0.015);
7 SavingsAccount sa1(1, 58320212, 0.015);
8
9 sa0.deposit(5,5000);
10 sa1.deposit(25,10000);
11 sa0.deposit(45,5500);
12 sa1.withdraw(60,4000);
13
14 sa0.settle(90);
15 sa1.settle(90);
16
17 sa0.show(); cout << endl;
18 sa1.show(); cout << endl;
19 cout << "Total: " << SavingsAccount::getTotal() << endl;
20 return 0;
21 }
View Code
运行结果截图
标签：const,string,对象,double,void,编程,int,Complex,实验 From： https://www.cnblogs.com/chenxiaolong202083290491/p/17780251.html