实验任务三：
Employee.hpp:
#pragma once
#include<iostream>
#include<string>
#include<iomanip>
using std::string;
using std::cout;
using std::endl;
using std::setfill;
using std::setw;
using std::left;
using std::right;
using std::to_string;
struct Date {
int year;
int month;
int day;
};
class Employee
{
public:
Employee();
Employee(string name0, double salary0, int y, int m, int d = 1);
void set_info(string name0, double salary0, int y, int m, int d = 1);
string get_name() const;
double get_salary() const;
void display_info() const;
void update_salary(double s);
void update_hire_date(int y, int m, int d);
void raise_salary(double by_percent);
public:
static void display_count();
private:
string id;
string name;
double salary;
Date hire_date;
public:
static const string doc;
private:
static int count;
};
const string Employee::doc{ "a simpe Employee class" };
int Employee::count = 0;
Employee::Employee() :id{ to_string(count + 1) } { ++count; }
Employee::Employee(string name0, double salary0, int y, int m, int d) : id{ to_string(count + 1) }, name{ name0 }, salary{ salary0 }, hire_date{y,m,d}
{++count;
}
void Employee::set_info(string name0, double salary0, int y, int m, int d)
{
name = name0;
salary = salary0;
hire_date.year = y;
hire_date.month = m;
hire_date.day = d;
}
string Employee::get_name()const {
return name;
}
double Employee::get_salary() const {
return salary;
}
void Employee::display_info()const {
cout << left << setw(15) << "id:" << id << endl;
cout << setw(15) << "name:" << name << endl;
cout << setw(15) << "salary:" << salary << endl;
cout << setw(15) << "hire_date:" << hire_date.year << "-";
cout << right << setfill('0') << setw(2) << hire_date.month << "-" << setw(2) << hire_date.day;
cout << setfill(' ');
}
void Employee::update_salary(double s) {
salary = s;
}
void Employee::update_hire_date(int y, int m, int d) {
hire_date.year = y;
hire_date.month = m;
hire_date.day = d;
}
void Employee::raise_salary(double by_percent) {
double raise = salary * by_percent / 100;
salary += raise;
}
void Employee::display_count() {
cout << "there are" << count << "employees\n";
}
task3.cpp:
#include "Employee.hpp"
#include <iostream>
void test() {
using std::cout;
using std::endl;
cout << Employee::doc << endl << endl;
Employee employee1;
employee1.set_info("Sam", 30000, 2015, 1, 6);
employee1.update_hire_date(2017, 6, 30);
employee1.update_salary(35000);
employee1.display_info();
cout << endl << endl;
Employee employee2{ "Tony", 20000, 2020, 3, 16 };
employee2.raise_salary(15); // Ìá³É15%
employee2.display_info();
cout << endl << endl;
Employee::display_count();
}
int main() {
test();
}
测试结果：
实验任务四：
Complex.hpp:
#pragma once
#include<iostream>
#include<cmath>
using namespace std;
class Complex {
public:
Complex(float r=0, float i = 0):real{r},imag{i}{}
Complex(const Complex& c);
~Complex()=default;
float get_real() const { return real; }
float get_imag() const { return imag; }
void show() const;
Complex add(const Complex& c);
friend Complex add(const Complex& c1, const Complex& c2);
friend bool is_equal(const Complex& c3, const Complex& c4);
friend float abs(Complex& c);
private:
float real, imag;
};
Complex::Complex(const Complex& c) : real{ c.real }, imag{ c.imag }{}
void Complex::show() const {
if (imag > 0)
cout << real << "+" << imag << "i";
else if (imag < 0)
cout << real << imag << "i";
else
cout << real;
}
Complex Complex::add(const Complex& c) {
real += c.real, imag += c.imag;
return Complex(real + c.real, imag + c.imag);
}
Complex add(const Complex& p1, const Complex& p2) {
return Complex(p1.real + p2.real, p1.imag + p2.imag);
}
bool is_equal(const Complex& p3, const Complex& p4) {
if (p3.real == p4.real && p3.imag == p4.imag)
return true;
else
return false;
}
float abs(Complex& c) {
return sqrt(c.real * c.real + c.imag * c.imag) ;
}
task4.cpp:
#include "Complex.hpp"
#include <iostream>
void test() {
using namespace std;
Complex c1(3, -4);
const Complex c2(4.5);
Complex c3(c1);
cout << "c1 = ";
c1.show();
cout << endl;
cout << "c2 = ";
c2.show();
cout << endl;
cout << "c2.imag = " << c2.get_imag() << endl;
cout << "c3 = ";
c3.show();
cout << endl;
cout << "abs(c1) = ";
cout << abs(c1) << endl;
cout << boolalpha;
cout << "c1 == c3 : " << is_equal(c1, c3) << endl;
cout << "c1 == c2 : " << is_equal(c1, c2) << endl;
Complex c4;
c4 = add(c1, c2);
cout << "c4 = c1 + c2 = ";
c4.show();
cout << endl;
c1.add(c2);
cout << "c1 += c2, " << "c1 = ";
c1.show();
cout << endl;
}
int main() {
test();
}
测试结果：
Attention：将~Complex（）改成~Complex（）=default才运行成功.
实验任务五：
User.hpp:
#pragma once
#include<iostream>
#include<string>
using namespace std;
class User {
private:
string name, passwd, email,new_email,old_passwd,new_passwd;
int n;
static int count;
public:
User(string nam) { name = nam, passwd = "111111", email = " ";++count; }
User(string nam, string pass , string em ) { name = nam, passwd = pass, email = em; ++count; }
~User() = default;
void set_email() ;
void change_passwd();
void print_info();
static void print_n();
};
int User::count = 0;
void User::set_email() {
cout << "Enter email address: " ;
cin >> email;
cout << "email is set successfully... " << endl;
}
void User::change_passwd() {
cout << "Enter old passwd: " ;
int i;
cin >> old_passwd;
for (i = 1;i <=3;++i) {
if (old_passwd != passwd)
{
if (i < 3)
{
cout << "password input error. Please re-enter again: ";
cin >> old_passwd;
}
else
cout << "password input error. Please try after a whike." << endl;
}
else
{
cout << "Enter new passwd: ";
cin >> new_passwd;
passwd = new_passwd;
cout << "new passwd is set successfully..." << endl;
break;
}
}
}
void User::print_info()
{
cout << "name: " << name << endl;
int len = size(passwd);
cout << "passwd: ";
while (len--)cout << '*';
cout << endl;
cout << "email: " << email << endl;
}
void User::print_n() {
cout << "there are " << count << " users." << endl;
}
task5.cpp:
#include "User.hpp"
#include <iostream>
void test() {
using std::cout;
using std::endl;
cout << "testing 1......\n";
User user1("Jonny", "92197", "[email protected]");
user1.print_info();
cout << endl
<< "testing 2......\n\n";
User user2("Leonard");
user2.change_passwd();
user2.set_email();
user2.print_info();
cout << endl;
User::print_n();
}
int main() {
test();
}
测试结果1：
测试结果2：
标签：const,string,对象,void,int,Complex,实验,Employee From： https://www.cnblogs.com/z-zy/p/16800695.html