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实验二 类和对象

时间：2023-10-22 16:22:19浏览次数：23  
标签：const string 对象 double void int 实验 include

task1.cpp

方式一

t.h

#ifndef T_H 
#define T_H 
#include <iostream> 
#include <string> 
using namespace std; 
class T { 
public: 
T(int x = 0, int y = 0);  
T(const T &t); 
T(T &&t); 
~T(); 
void set_m1(int x); 
int get_m1() const; 
int get_m2() const; 
void display() const;
friend void func(); 
private: 
int m1, m2; 
public: 
static void disply_count();
public: 
static const string doc; 
static const int max_count;
private: 
static int count; 
};
void func(); 
#endif
View Code

t.cpp

 

#include "t.h"  
const string T::doc{"a simple class"}; 
const int T::max_count = 99; 
int T::count = 0; 
T::T(int x, int y): m1{x}, m2{y} { 
++count; 
cout << "constructor called.\n"; 
}
T::T(const T &t): m1{t.m1}, m2{t.m2} { 
++count; 
cout << "copy constructor called.\n"; 
}
T::T(T &&t): m1{t.m1}, m2{t.m2} { 
++count; 
cout << "move constructor called.\n"; 
}
T::~T() { 
--count; 
cout << "destructor called.\n"; 
}
void T::set_m1(int x) { 
m1 = x; 
}
int T::get_m1() const { 
return m1; 
}
int T::get_m2() const { 
return m2; 
}
void T::display() const { 
cout << m1 << ", " << m2 << endl; 
}

void T::disply_count() { 
cout << "T objects: " << count << endl;  
}
 
void func() { 
T t1; 
t1.set_m1(55); 
t1.m2 = 77; 
t1.display(); 
}
View Code

main.cpp

#include "t.h" 
void test() { 
cout << "T class info: " << T::doc << endl; 
cout << "T objects max_count: " << T::max_count << endl; 
T::disply_count(); 
T t1; 
t1.display(); 
t1.set_m1(42); 
T t2{t1}; 
t2.display(); 
T t3{std::move(t1)}; 
t3.display(); 
t1.display(); 
T::disply_count(); 
}
int main() { 
cout << "============测试类T============" << endl; 
test(); 
cout << endl; 
cout << "============测试友元函数func()============" << endl; 
func(); 
}
View Code

运行结果

方式二

t.hpp

#pragma once 
#include <iostream> 
#include <string> 
using namespace std; 

class T { 
public: 
T(int x = 0, int y = 0); 
T(const T &t); 
T(T &&t);
~T(); 
void set_m1(int x); 
int get_m1() const;
int get_m2() const; 
void display() const;  
friend void func();
private: 
int m1, m2; 
public: 
static void disply_count(); 
public: 
static const string doc; 
static const int max_count; 
private: 
static int count;
};

const string T::doc{"a simple class"}; 
const int T::max_count = 99; 
int T::count = 0; 
 
T::T(int x, int y): m1{x}, m2{y} { 
++count; 
cout << "constructor called.\n"; 
}
T::T(const T &t): m1{t.m1}, m2{t.m2} { 
++count; 
cout << "copy constructor called.\n"; 
}
T::T(T &&t): m1{t.m1}, m2{t.m2} { 
++count; 
cout << "move constructor called.\n"; 
}
T::~T() { 
--count; 
cout << "destructor called.\n"; 
}
void T::set_m1(int x) { 
m1 = x; 
}
int T::get_m1() const { 
return m1; 
}
int T::get_m2() const { 
return m2; 
}
void T::display() const { 
cout << m1 << ", " << m2 << endl; 
}

void T::disply_count() { 
cout << "T objects: " << count << endl; 
}
View Code

main.cpp

#include "t.hpp" 

void test() { 
cout << "T class info: " << T::doc << endl; 
cout << "T objects max_count: " << T::max_count << endl; 
T::disply_count(); 
T t1; 
t1.display(); 
t1.set_m1(42); 
T t2{t1}; 
t2.display(); 
T t3{std::move(t1)}; 
t3.display(); 
t1.display(); 
T::disply_count(); 
}
 
int main() { 
cout << "============测试类T============" << endl; 
test(); 
cout << endl; 
cout << "============测试友元函数func()============" << endl; 
func(); 
}
View Code

运行结果

task2.cpp

Employee.cpp

#pragma once 
// Employee类的定义 
#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; 
};
// Employee类的声明 
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); 
// 设置雇员信息 
string get_name() const; // 获取雇员姓名 
double get_salary() const; // 获取雇员薪水 
void display_info() const; // 显示雇员信息 
void update_salary(double s); // 更新雇员薪水 
void update_hire_date(int y, int m, int d); // 更新雇佣日期 
void raise_salary(double by_percent); // 计算提薪加成 
public: 
static void display_count(); // 类方法，显示雇员总数 
private: 
string id; // 雇员工号 
string name; // 雇员姓名 
double salary; // 雇员薪水 
Date hire_date; // 雇员雇佣日期 
public: 
static const string doc; // 类属性，用于描述类 
private: 
static int count; // 类属性，用于记录雇员总人数 
};
const string Employee::doc {"a simple Employee class"}; 
int Employee::count = 0; 
// 默认构造函数 
Employee::Employee(): id{ to_string(count+1) } { 
++count; 
}
// 带参数的构造函数 
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; 
}
// 设置员工信息 
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; 
}
// 获取员工姓名 
string Employee::get_name() const { 
return name; 
}
// 获取员工薪水 
double Employee::get_salary() const { 
return salary; 
}
// 显示雇员信息 
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 << std::right << setfill('0') << setw(2) << hire_date.month << "-" 
<< setw(2) << hire_date.day; 
cout << setfill(' '); // 恢复到默认空格填充 
}
// 更新薪水 
void Employee::update_salary(double s) { 
salary = s; 
}
// 更新雇佣日期 
void Employee::update_hire_date(int y, int m, int d) { 
hire_date.year = y; 
hire_date.month = m; 
hire_date.day = d; 
}
// 雇员提薪加成 
// by_percent是提升比例 
void Employee::raise_salary(double by_percent) { 
double raise = salary * by_percent / 100; 
salary += raise; 
}
// 类方法 
// 显示雇员总数 
void Employee::display_count() { 
cout << "there are " << count << " employees\n"; 
}
View Code

main.cpp

#include "Employee.hpp" 
#include <iostream> 
// 测试：Employee类 
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(2019, 6, 30); 
employee1.update_salary(35000); 
employee1.display_info(); 
cout << endl << endl; 
Employee employee2{"Tony", 20000, 2023, 3, 16}; 
employee2.raise_salary(15); // 提成15% 
employee2.display_info(); 
cout << endl << endl; 
Employee::display_count(); 
}
int main() { 
test(); 
}
View Code

运行结果

 task3.cpp

Complex.cpp

#pragma once
#include <iostream> 
#include <cmath> 
class Complex{
    private:
        double real, imag;
    public:
        Complex(double r=0,double i=0){
        real=r;
        imag=i;
        };
        Complex(const Complex &c){
            real=c.real;
            imag=c.imag;
        }
        double get_real() const {
            return real;
        }
        double get_imag() const {
            return imag;
        }
        void add(const Complex &c1){
            real += c1.get_real();
            imag += c1.get_imag();
        }
        void show(){
            std::cout << real;
            if (imag>0) 
            std::cout << " + " << abs(imag) << 'i';
            if (imag<0) 
            std::cout << " - " << fabs(imag) << 'i';
        }
        void show() const{
        std::cout << real;
        if (imag>0) std::cout << "+" << abs(imag) << "i";
        if (imag<0) std::cout << "-" << abs(imag) << "i";    
        }
    public:
        friend Complex add(const Complex &c1, const Complex &c2){return Complex(c1.get_real() + c2.get_real(),c1.get_imag() + c2.get_imag());}
        friend bool is_equal(const Complex &c1, const Complex &c2){    return (c1.real == c2.real) && (c1.imag == c2.imag);}
        friend double abs(const Complex &c1){return sqrt(c1.real * c1.real + c1.imag * c1.imag);}
};
View Code

main.cpp

#include <iostream> 
#include <cmath> 
#include"Complex.cpp"

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(); 
}
View Code

运行结果

task4.cpp

 User.hpp

#pragma once
#include <iostream>
#include <string>

using std::string; 
using std::cout;
using std::cin;
class User{
public:    
    User();
    User(string name0,string passwd0="111111",string email0=""):name{name0},passwd{passwd0},email{email0}
    {n++;
    };
    void print_info();
    void set_email();
    void change_passwd();
public:
    static void print_n();
private:
    string name;
    string passwd;
    string email;
private:
    static int n;

};
int User::n=0;


void User::set_email(){
    using namespace std;
    cout << "Enter email address: ";
    string email0;
    cin>>email0;
    email=email0; 
    cout << "email is set successfully...\n";
    
}

void User::print_info(){
    using namespace std;
    string s(passwd.size(),'*');     cout << "password: " << s << endl;
    cout << "name: " << name << endl;    
    cout << "email: " << email << endl;

}

void User::change_passwd(){
    using namespace std;
    string pwd,newwd;
    for(int i=0;i<=3;i++)
    {
    
        if(i==0){
        
            cout<<"Enter old password:";
        }
        if(i==3){
        
            cout << "Please try after a while. \n";
            break;
    }
        
        else {
            cout<<"Please re-enter again:";
            cin>>pwd;
            if  (pwd!=passwd){
            
                cout<<"password input error.\n";
                continue;
            }
            else{
            
                cout<<"Enter newpassword:";
                cin>>newwd;
                passwd=newwd;
                cout << "new passwd is set successfully...\n";
                break;
            }
        }
    }    
}
void User::print_n(){
    cout << "there are " << n << " users\n";
    
    
}
View Code

task4.cpp

#include "User.hpp" 
#include <iostream> 
// 测试User类 
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(); 
}
View Code

 task5.cpp

accout.hpp

class SavingsAccount
{
private:
    int id;
    double balance;
    double rate;
    int lastDate;
    double accumulation;
    static double total;
    void record(int data,double amount);
    double accumulate(int date)const
    {
        return accumulation+balance*(date-lastDate);
    }
public:
    SavingsAccount(int data,int id,double rate);
    int getId()const{return id;}
    double getBalance()const{return balance;}
    double getRate()const{return rate;}
    static double getTotal(){return total;}
    void deposit(int date,double amount);
    void withdraw(int data,double amount);
    void settle(int date);
    void show() const;
};
View Code 
#include"accout.hpp"
#include<cmath>
#include<iostream>
using namespace std;
double SavingsAccount::total=0;
SavingsAccount::SavingsAccount(int date,int id,double rate):id(id),balance(0),rate(rate),lastDate(date),accumulation(0)
{
    cout<<date<<"\t#"<<id<<"is created"<<endl;
}
void SavingsAccount::record(int date,double amount)
{
    accumulation=accumulate(date);
    lastDate=date;
    amount=floor(amount*100+0.5)/100;
    balance+=amount;
    total+=amount;
    cout<<date<<"\t#"<<id<<"\t"<<amount<<"\t"<<balance<<endl;
}
void SavingsAccount::deposit(int date,double amount)
{
    record(date,amount);
}
void SavingsAccount::withdraw(int date,double amount)
{
    if(amount>getBalance())
        cout<<"Error:not enough money"<<endl;
    else
        record(date,-amount);
}
void SavingsAccount::settle(int data)
{
    double interest=accumulate(data)*rate/365;
    if(interest!=0)
        record(data,interest);
    accumulation=0;
}
void SavingsAccount::show() const
{
    cout<<"#"<<id<<"\tBalance:"<<balance;
}
View Code 
#include "accout.hpp"
#include <iostream>
using namespace std;
int main() {
    //建立几个帐户
    SavingsAccount sa0(1, 21325302, 0.015);
    SavingsAccount sa1(1, 58320212, 0.015);
    //几笔账目
    sa0.deposit(5, 5000) ;
    sa1.deposit(25, 10000);
    sa0.deposit(45, 5500);
    sa1.withdraw(60, 4000);
    //开户后第90天到了银行的计息日,结算所有账户的年息
    sa0.settle(90);
    sa1.settle(90);
    //输出各个帐户信息
    sa0.show();cout << endl;
    sa1.show();cout << endl;
    cout << "Total:" << SavingsAccount::getTotal() << endl;
    return 0;
}
View Code

运行结果

 

标签：const,string,对象,double,void,int,实验,include
From： https://www.cnblogs.com/PerfectAllKill/p/17766934.html

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