第一周实验：二次开发
- 来源
来自大一舍友C++大作业。该项目模拟了一个图书管理系统，涉及到用户对于书籍的查看、借阅与归还，管理员对于书籍相关信息的增删改查。 - 运行环境+运行结果的截图
运行环境：Windows 11 + Visual Studio 2022
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main.cpp
#include<Windows.h>
#include "Account.h"
#include "libaray.h"
#include<iostream>
using std::cout;
using std::endl;
using std::cin;
void cls()
{
system("cls");
}
int main()
{
AccontList list;
AllLibaray lib;
auto reject = [&list, &lib]()
{
string acc, pass, name;
system("cls");
cout << "\t注册" << endl;
cout << "账户:";
cin >> acc;
cout << "密码:";
cin >> pass;
cout << "用户名:";
cin >> name;
while (!list.reje(acc, pass, name))
{
system("cls");
cout << "\t注册账号,重复请重试\n账户:";
cin >> acc;
cout << "密码:";
cin >> pass;
cout << "用户名:";
cin >> name;
}
cls();
cout << " 注册成功" << endl;
system("pause");
};
auto log = [&list, &lib]()
{
cls();
int i; string acc, pass;
cout << "请选择以何种身份登录" << endl;
cout << "1.管理员 2.用户 " << endl;
cin >> i;
cls();
cout << "账户:";
cin >> acc;
cout << "密码:";
cin >> pass;
if (i == 1)
{
if (!list.loginManager(acc, pass))
{
do
{
cls();
cout << "账号密码错误，请重新输入\n";
cout << "账户:";
cin >> acc;
cout << "密码:";
cin >> pass;
} while (!list.loginManager(acc, pass));
}
cls();
cout << "登陆成功,欢迎管理员使用" << endl;
return -1;
}
else
{
int i;
if ((i = list.loginUser(acc, pass)) != -1)
{
cls();
cout << "登陆成功,欢迎用户" << list[i].getName()
<< "使用" << endl;
return i;
}
else
{
do
{
cls();
cout << "账号密码错误，请重新输入\n";
cout << "账户:";
cin >> acc;
cout << "密码:";
cin >> pass;
} while ((i = list.loginUser(acc, pass)) == -1);
cls();
cout << "登陆成功,欢迎用户" << list[i].getName()
<< endl;
return i;
}
}
};
auto manage = [&list, &lib]()
{
int j = 0;
lib.choice();
system("pause");
while (true)
{
cls();
cout << "请根据提示输入数字以进行操作" << endl;
cout << "1.重新选择书籍库 2.修改现有书籍数量 3.增添新的书籍" << endl;
cout << "4.删除书籍 5.显示本书籍库中所有书籍 6.查找书籍" << endl;
cout << "7.退出登录" << endl;
cin >> j;
cls();
switch (j)
{
case 1:lib.choice();
break;
case 2:lib.add();
break;
case 3:lib.addnew();
break;
case 4:lib.erase();
break;
case 5:lib.showAll();
break;
case 6:cout << "请选择查找书籍的方式:\n1.根据书籍id精确搜索 2.模糊搜索" << endl;
cin >> j;
if (j == 2)lib.search();
else lib.searchBook();
break;
case 7:goto endManage;
break;
}
system("pause");
}
endManage:
cls();
};
auto use = [&list, &lib](User& user)
{
if (user.getFine() != 0)
{
cout << "您有" << user.getFine() << "本书籍逾期，请尽快还书" << endl;
system("pause");
cls();
}
int j = 0;
lib.choice();
system("pause");
while (true)
{
cls();
cout << "请根据提示输入数字以进行操作" << endl;
cout << "1.重新选择书籍库 2.借阅书籍 3.借书管理" << endl;
cout << "4.显示本书籍库中所有书籍 5.查找书籍 6.退出登录" << endl;
cin >> j;
cls();
switch (j)
{
case 1:lib.choice();
break;
case 2:user.push_back(lib.lend());
break;
case 3:cout << "请根据提示输入数字以进行操作\n1.查看借阅信息 2.还书" << endl;
cin >> j;
cls();
if (j == 1)
{
user.showBorrow();
}
else if (j == 2)
{
bool p = true;
Borrow& borrow = user.returnBook(p);
if (p)
{
lib.returnBook(borrow);
cout << "还书成功" << endl;
}
}
break;
case 4:lib.showAll();
break;
case 5:cout << "请选择查找书籍的方式:\n1.根据书籍id精确搜索 2.模糊搜索" << endl;
cin >> j;
if (j == 2)lib.search();
else lib.searchBook();
break;
break;
case 6:goto endUse;
break;
}
system("pause");
}
endUse:
cls();
};
int i = 0; bool islog = false;
while (true)
{
cls();
cout << " 欢迎使用图书馆管理系统 " << endl;
cout << "请根据提示输入数字以进行操作" << endl;
cout << " 1.登录 2.注册 3.退出 " << endl;
cin >> i;
switch (i)
{
case 3:goto end;
break;
case 2:reject();
break;
case 1:i = log(); islog = true;
break;
}
if (islog)
{
if (i == -1)
{
manage();
islog = false;
}
else
{
use(list[i]);
islog = false;
}
}
}
end:
cls();
cout << "感谢您的使用！再见" << endl;
}
Borrow.h
#pragma once
#include<string>
#include<chrono>
#include <fstream>
#include<iostream>
#include<iomanip>
class Borrow
{
std::string ID;
std::string name;
bool isreturn = false;
std::chrono::system_clock::time_point begin, end;
std::chrono::system_clock::time_point should;
public:
Borrow() = default;
Borrow(std::string ID, std::string name, int day = 60);
void returnbook();
void show();
bool isReturn();
bool overtime();
std::string getID();
void is(bool is);
void change(std::chrono::system_clock::time_point a, std::chrono::system_clock::time_point b, std::chrono::system_clock::time_point c);
std::tuple<std::chrono::system_clock::time_point, std::chrono::system_clock::time_point, std::chrono::system_clock::time_point>
write();
bool noemp() const;
friend std::ofstream& operator<<(std::ofstream& out, const Borrow& aim);
};
Borrow.cpp
#include "Borrow.h"
Borrow::Borrow(std::string ID, std::string name, int day)
:ID(ID), name(name), begin(std::chrono::system_clock::now() + std::chrono::hours(8)-std::chrono::days(60)), should(begin + std::chrono::days(day))
{
}
void Borrow::returnbook()
{
end = std::chrono::system_clock::now() + std::chrono::hours(8);
isreturn = true;
}
void Borrow::show()
{
std::cout << "书籍编号:" << std::left << std::setw(10) << ID << " 书名:"
<< std::left << std::setw(10) << name << "借阅时间:" << begin << std::endl;
if (isreturn)
{
std::cout << "书籍状态:已归还" << "\t 还书时间:" << end << std::endl;
}
else
{
std::cout << "书籍状态:未归还" << "\t 应还时间:" << should << std::endl;
}
}
bool Borrow::isReturn()
{
return isreturn;
}
bool Borrow::overtime()
{
return std::chrono::system_clock::now() > should;
}
std::string Borrow::getID()
{
return ID;
}
void Borrow::is(bool is)
{
isreturn = is;
}
void Borrow::change(std::chrono::system_clock::time_point a, std::chrono::system_clock::time_point b, std::chrono::system_clock::time_point c)
{
begin = a; end = b; should = c;
}
std::tuple<std::chrono::system_clock::time_point, std::chrono::system_clock::time_point, std::chrono::system_clock::time_point> Borrow::write()
{
return std::tuple<std::chrono::system_clock::time_point, std::chrono::system_clock::time_point,
std::chrono::system_clock::time_point>(begin, end, should);
}
bool Borrow::noemp() const
{
return !ID.empty();
}
std::ofstream& operator<<(std::ofstream& out, const Borrow& aim)
{
out << aim.ID << ' ' << aim.name << ' ' << aim.isreturn;
return out;
}
Account.h
#pragma once
#include <Windows.h>
#include "Borrow.h"
#include <string>
#include <fstream>
using namespace std;
class Account
{
protected:
string account, password, name;
public:
Account(string account, string password, string name);
~Account();
bool log(const string& account, const string& password);
string getName();
};
class User :public Account
{
private:
size_t fine;
vector<Borrow> list;
public:
User(string account, string password, string name);
~User();
string& getAccount();
size_t getFine();
void push_back(const Borrow& b);
void showBorrow();
Borrow& returnBook(bool& p);
friend ofstream& operator<<(ofstream& out, const User& aim);
};
class AccontList
{
Account manager;
vector<User> user;
public:
AccontList();
~AccontList();
int loginUser(const string& account, const string& password);
bool loginManager(const string& account, const string& password);
Account& manage();
User& operator[](int i);
bool reje(const string& account, const string& password, const string& name);
};
Account.cpp
#include "Account.h"
Account::Account(string account, string password, string name)
:account(account),password(password),name(name)
{
}
Account::~Account()
{
}
bool Account::log(const string& account, const string& password)
{
return this->account == account && this->password == password;
}
string Account::getName()
{
return name;
}
User::User(string account, string password, string name)
:Account(account, password, name),fine(0)
{
ifstream in(account + ".txt");
ifstream inb(account + ".dat", std::ios::in | std::ios::binary);
if (in.good())
{
string ID, BookName; bool is;
while (!in.eof())
{
in >> ID >> BookName >> is;
Borrow boo(ID, BookName);
boo.is(is);
std::chrono::system_clock::time_point a, b, c;
inb.read(reinterpret_cast<char*>(&a), sizeof(std::chrono::system_clock::time_point));
inb.read(reinterpret_cast<char*>(&b), sizeof(std::chrono::system_clock::time_point));
inb.read(reinterpret_cast<char*>(&c), sizeof(std::chrono::system_clock::time_point));
boo.change(a, b, c);
list.push_back(boo);
}
}
if (!list.empty())
{
for (auto& fff : list)
{
if (!fff.isReturn()&&fff.overtime())
{
fine += 1;
}
}
}
}
User::~User()
{
if (!list.empty())
{
ofstream out(account + ".txt");
ofstream outb(account + ".dat", std::ios::out | std::ios::binary);
for (int i = 0; i < list.size(); i++)
{
out << list[i];
if (i < list.size() - 1)
{
out << '\n';
}
auto tup = list[i].write();
std::chrono::system_clock::time_point a = std::get<0>(tup), b = std::get<1>(tup), c = std::get<2>(tup);
outb.write(reinterpret_cast<char*>(&a), sizeof(std::chrono::system_clock::time_point));
outb.write(reinterpret_cast<char*>(&b), sizeof(std::chrono::system_clock::time_point));
outb.write(reinterpret_cast<char*>(&c), sizeof(std::chrono::system_clock::time_point));
}
}
}
string& User::getAccount()
{
return account;
}
size_t User::getFine()
{
return fine;
}
void User::showBorrow()
{
if (list.empty())
{
cout << "尚无借书记录" << endl;
}
for (auto& borrow : list)
{
borrow.show();
}
}
Borrow& User::returnBook(bool& p)
{
int j;
for (int i = 0; i < list.size(); ++i)
{
cout <<"编号:" << i << '.';
list[i].show();
}
cout << "请输入要归还的书籍所对应的借书记录编号" << endl;
cin >> j;
system("cls");
if (j >= list.size() || j < 0)
{
cout << "没有此借书记录" << endl;
Borrow a;
p = false;
return a;
}
else if (list[j].isReturn())
{
cout << "书籍已经被归还" << endl;
Borrow a;
p = false;
return a;
}
return list[j];
}
void User::push_back(const Borrow& b)
{
if(b.noemp())
list.push_back(b);
}
AccontList::AccontList()
:manager("mashiro","0721","管理员")
{
ifstream in("user.txt");
while (!in.eof())
{
string a, b, c;
in >> a >> b >> c ;
user.emplace_back(a, b, c);
}
}
AccontList::~AccontList()
{
ofstream out("user.txt");
for (int i = 0; i < user.size(); i++)
{
out << user[i];
if (i < user.size() - 1)
{
out << '\n';
}
}
}
bool AccontList::loginManager(const string& account, const string& password)
{
return manager.log(account, password);
}
int AccontList::loginUser(const string& account, const string& password)
{
for (int i = 0; i < user.size(); i++)
{
if (user[i].log(account, password))
{
return i;
}
}
return -1;
}
User& AccontList::operator[](int i)
{
return user[i];
}
bool AccontList::reje(const string& account, const string& password, const string& name)
{
for (auto& a : user)
{
if (a.getAccount() == account)
{
return false;
}
}
user.emplace_back(account, password, name);
return true;
}
Account& AccontList::manage()
{
return manager;
}
ofstream& operator<<(ofstream& out, const User& aim)
{
out << aim.account << ' ' << aim.password << ' ' << aim.name ;
return out;
}
Books.h
#pragma once
#include <iostream>
#include <string>
#include<iomanip>
#include<vector>
#include<algorithm>
#include<fstream>
using namespace std;
class Books {
protected:
string id;
string name;
double price;
string author;
string publishing;
int inventory;
float totalmark = 0;
size_t totalman = 0;
public:
Books(string a, string b, double c, string d, string e, int f);
~Books();
Books();
string get_id();
string get_name();
double get_price();
string get_author();
string get_publishing();
int get_inventory();
float get_aver_mark()const;
float get_totalmark();
int get_totalman();
virtual void ShowMe();
friend ofstream& operator<<(ofstream& out, const Books& a);
friend ifstream& operator>>(ifstream& in, Books& a);
bool Search(const string& a);
friend Books& operator+(Books& ,int b);
friend Books& operator-(Books& , int b);
Books& operator++();
const Books operator++(int);
Books& operator--();
const Books operator--(int);
void evaluate();
void dis_evalution();
};
class ScienceBook :public Books {
public:
ScienceBook(string id, string name, double price, string author, string publishing, int inventory);
ScienceBook() = default;
};
class SocialBook :public Books {
public:
SocialBook(string id, string name, double price, string author, string publishing, int inventory);
SocialBook() = default;
};
class ForeignBook :public Books {
protected:
string Language;
public:
virtual void ShowMe();
ForeignBook(string id, string name, double price, string author, string publishing, int inventory, string language);
friend ofstream& operator<<(ofstream& out, const ForeignBook& a);
friend ifstream& operator>>(ifstream& in, ForeignBook& a);
void evaluate();
void dis_evalution();
ForeignBook() = default;
};
Books.cpp
#include"Books.h"
Books::Books(string a, string b, double c, string d, string e, int f)
:id(a), name(b), price(c), author(d), publishing(e), inventory(f) {}
Books::~Books(){}
Books::Books(){}
ScienceBook::ScienceBook(string id, string name, double price, string author, string publishing, int inventory)
:Books(id, name, price, author, publishing, inventory) {}
SocialBook::SocialBook(string id, string name, double price, string author, string publishing, int inventory)
:Books(id, name, price, author, publishing, inventory) {}
ForeignBook::ForeignBook(string id, string name, double price, string author, string publishing, int inventory, string language)
:Books(id, name, price, author, publishing, inventory), Language(language) {}
void ForeignBook::evaluate()
{
string evalution;
float a;
ofstream eva(name + ".txt", ios::ate | ios::app);
cout << "请输入你对该书的评分" << endl;
while (true)
{
cin >> a;
if (a >= 0 && a <= 10.0)
{
eva << a << " ";
totalman++;
totalmark = totalmark + a;
break;
}
else
cout << "评分应为0-10请重新输入" << endl;
}
cout << "请输入你对这本书的评价" << endl;
cin >> evalution;
eva << evalution << endl;
}
void ForeignBook::dis_evalution()
{
ifstream fin(name + ".txt", ios::in);
vector<string>a;
vector<float>b;
string evalu;
float score;
while (fin >> score && fin >> evalu)
{
b.emplace_back(score);
a.emplace_back(evalu);
}
for (int i = 0; i < a.size(); i++)
{
cout << "评分：" << b[i] << " ";
cout << "评价：" << a[i] << endl;
}
}
ofstream& operator<<(ofstream& out, const Books& a)
{
out << a.id << " " << a.name << " " << a.price << " " << a.author << " " << a.publishing
<< " " << a.inventory << " "<<a.totalmark<<" "<<a.totalman;
return out;
}
ifstream& operator >>(ifstream& in, Books& a)
{
in >> a.id >> a.name >> a.price >> a.author >> a.publishing >> a.inventory>>a.totalmark>>a.totalman;
return in;
}
ofstream& operator<<(ofstream& out, const ForeignBook& a)
{
out << a.id << " " << a.name << " " << a.price << " " << a.author << " " << a.publishing <<
" " << a.inventory << " " << a.Language <<" "<<a.totalmark<<" "<<a.totalman;
return out;
}
ifstream& operator >>(ifstream& in, ForeignBook& a)
{
in >> a.id >> a.name >> a.price >> a.author >> a.publishing >> a.inventory>>a.Language >> a.totalmark >> a.totalman;
return in;
}
Books& operator+(Books& a,int b)
{
a.inventory = a.inventory + b;
return a;
}
Books& operator-(Books& a, int b)
{
a.inventory = a.inventory - b;
return a;
}
string Books::get_id(){ return id; }
string Books::get_name(){ return name; }
double Books::get_price(){ return price; }
string Books::get_author() { return author; }
string Books::get_publishing() { return publishing; }
int Books::get_inventory() { return inventory; }
float Books::get_totalmark() { return totalmark; }
int Books::get_totalman() { return totalman; }
float Books::get_aver_mark()const { return totalmark / totalman; }
void Books::ShowMe(){
cout << "编号：" << std::left << setw(10) << id << " " << "书名：" << std::left << setw(10) << name << " " << "价格：" <<
std::left << setw(8) << setprecision(4) << price << " " << "作者：" << std::left << setw(10) << author << " " << "出版社：" <<
std::left << setw(10) << publishing << " " << "库存：" << std::left << setw(5) << inventory
<< " ";
if (totalman == 0)
{
cout << "暂无评分" << endl;
}
else
{
cout<< "评分：" << setprecision(2) << get_aver_mark() << endl;
}
}
void ForeignBook::ShowMe() {
cout << "编号：" << std::left << setw(10) << id << " " << "书名：" << std::left << setw(10) << name << " " << "价格：" <<
std::left << setw(8) << setprecision(4) << price << " " << "作者：" << std::left << setw(10) << author << " " << "出版社：" <<
std::left << setw(10) << publishing<< " " << std::left << setw(5) << "语言：" << Language << " " << "库存：" << std::left << setw(5) << inventory;
if (totalman == 0)
{
cout << "暂无评分" << endl;
}
else
{
cout <<"评分："<< setprecision(2) << get_aver_mark() << endl;
}
}
bool Books::Search(const string& a)
{
return id.find(a) != -1 || name.find(a) != -1 || author.find(a) != -1 || publishing.find(a) != -1;
}
Books& Books::operator++()
{
this->inventory++;
return *this;
}
const Books Books::operator++(int)
{
Books a;
this->inventory++;
return a;
}
Books& Books::operator--()
{
this->inventory--;
return *this;
}
const Books Books::operator--(int)
{
Books a;
this->inventory--;
return a;
}
void Books::evaluate()
{
string evalution;
float a;
ofstream eva(name + ".txt", ios::ate | ios::app);
cout << "请输入你对该书的评分" << endl;
while (true)
{
cin >> a;
if (a >= 0 && a <= 10.0)
{
totalman++;
totalmark=totalmark + a;
break;
}
else
cout << "评分应为0-10请重新输入" << endl;
}
char YON;
cout << "是否要为这本书写一段评价(Y/N)" << endl;
cin >> YON;
if(YON=='Y')
{
cout << "请输入你对这本书的评价" << endl;
cin >> evalution;
eva << evalution << endl;
}
}
void Books::dis_evalution()
{
ifstream fin(name + ".txt", ios::in);
if (fin.good())
{
vector<string>a;
string evalu;
while (fin >> evalu)
{
a.push_back(evalu);
}
if (!a.empty())
{
for (int i = 0; i < a.size(); i++)
{
cout << "评价：" << a[i] << endl;
}
}
}
}
libarary.h
#pragma once
#include<Windows.h>
#include"Books.h"
#include"Borrow.h"
#include<vector>
template<typename T,int S>
class Libaray
{
private:
std::vector<T> list;
public:
Libaray()
{
string a;
if (S == 1)
{
a = "1";
}
else if(S==2)
{
a="2";
}
else if (S == 3)
{
a="3";
}
std::ifstream file(a + "book.txt");
while (!file.eof())
{
T book;
file >> book;
list.push_back(book);
}
}//从文件中读取Books的信息并放入list
~Libaray()
{
string a;
if (S == 1)
{
a="1";
}
else if (S == 2)
{
a="2";
}
else if (S == 3)
{
a="3";
}
std::ofstream file(a+"book.txt");
for (int i = 0; i < list.size(); i++)
{
file << list[i];
if (i < list.size() - 1)
{
file << "\n";
}
}
}//将list中的book的信息传入文件
T& operator[](int i)
{
return list[i];
}
Borrow lend()
{
string id;
int day;
cout << "请输入您想寻找的书籍ID:";
cin >> id;
for (auto it = list.begin(); it != list.end(); ++it)
{
if (it->get_id() == id && it->get_inventory() > 0)
{
cout << "请输入您想借阅的天数：";
cin >> day;
--*it;
cout << "该书籍已被成功借阅" << endl;
return Borrow(id, it->get_name(), day);
}
}
cout << "您寻找的书籍未满足可借阅条件" << endl;
return Borrow();
}
void add()
{
string id;
int addnum;
cout << "请输入您想要增添库存的书籍ID：";
cin >> id;
cout << endl;
for (auto it = list.begin(); it != list.end(); ++it)
{
if (it->get_id() == id)
{
cout << "请输入您想要增添的数量：";
cin >> addnum;
cout << endl;
*it + addnum;
cout << "成功添加到库存当中";
return;
}
}
std::cout << "没有在书库中找到对应的书籍" << std::endl;
}
void addnew(string id,string name,double price,string author,string publishing,int inventory)
{
for (auto it = list.begin(); it != list.end(); it++)
{
if (it->get_id() == id)
{
std::cout << "该书籍ID与书库中已有的书籍的ID重合" << std::endl;
return;
}
if (it->get_name() == name)
{
cout << "该书籍的书名与书库中已有的书籍书名重合" << endl;
return;
}
}
list.push_back(T(id, name,price,author, publishing,inventory));
cout << "该书籍已被成功添入书库" << endl;
}
void addnew(string id, string name, double price, string author, string publishing, int inventory,string language)
{
for (auto it = list.begin(); it != list.end(); it++)
{
if (it->get_id() == id)
{
std::cout << "该书籍ID与书库中已有的书籍的ID重合" << std::endl;
return;
}
if (it->get_name() == name)
{
cout << "该书籍的书名与书库中已有的书籍书名重合" << endl;
return;
}
}
list.push_back(T(id, name, price, author, publishing, inventory,language));
cout << "该书籍已被成功添入书库" << endl;
}
void searchBook()
{
string id; char i;
cout << "请输入您想要搜索的书籍ID：";
cin >> id;
cout << endl;
system("cls");
for (T& book : list) {
if (book.get_id() == id) {
book.ShowMe();
cout << "\n是否要进一步查看书籍信息(T/F)" << endl;
cin >> i;
if (i == 'T')
{
system("cls");
cout << "1.查看书籍评价 2.评价书籍" << endl;
cin >> i;
if (i == '1')
{
book.dis_evalution();
}
else if (i == '2')
{
book.evaluate();
}
}
return;
}
}
std::cout << "未找到ID为" << id << "的书籍。" << std::endl;
}
void search()
{
bool find = false;
string aim;
cout << "请输入您想要搜索的书籍拥有的信息：";
cin >> aim;
cout << endl;
system("cls");
for (T& book : list)
{
if (book.Search(aim))
{
book.ShowMe();
find = true;
}
}
if (!find)
{
cout << "提供信息：" << aim << endl << "没有找到符合条件的书籍" << endl;
}
}
void erase()
{
string id;
cout << "请输入您想要删除的书籍ID：";
cin >> id;
cout << endl;
for (auto it = list.begin(); it != list.end(); ++it)
{
if (it->get_name() == id) {
system("cls");
std::cout << "已删除书籍: " << it->get_name() << std::endl;
list.erase(it);
return;
}
}
system("cls");
std::cout << "未找到ID为" << id << "的书籍。" << std::endl;
}
void showAll()
{
for (auto& book : list)
{
book.ShowMe();
}
}
void returnBook(Borrow& borrow)
{
for (T& book : list) {
if (book.get_id() == borrow.getID()) {
++book;
borrow.returnbook();
return;
}
}
}
};
class AllLibaray {
private:
Libaray<ScienceBook, 1>a;
Libaray<SocialBook, 2>b;
Libaray<ForeignBook, 3>c;
int i;
public:
void choice();
void addnew();
Borrow lend();
void add();
void searchBook();
void search();
void erase();
void showAll();
void returnBook(Borrow& borrow);
};
libarary.cpp
#include "libaray.h"
void AllLibaray::choice()
{
cout << "以下是图书馆书籍库的书籍类型：\n";
cout << "1.科学类书籍库\t2.社会类书籍库\t3.外语类书籍库\n";
cout << "请输入您想要进入的书籍库：";
cin >> i;
system("cls");
if (i == 1)
{
cout << "您将进入科学类书籍库\n";
}
else if (i == 2)
{
cout << "您将进入社会类书籍库\n";
}
else if (i == 3)
{
cout << "您将进入外语类书籍库\n";
}
}
void AllLibaray::addnew()
{
string id, name, author, publishing, language;
int inventory;
float price;
if (i == 1)
{
cout << "请输入您想要添加的书籍信息：\n";
cout << "书籍ID：";
cin >> id;
cout << endl << "书籍名字：";
cin >> name;
cout << endl << "书籍价格：";
cin >> price;
cout << endl << "书记作者：";
cin >> author;
cout << endl << "书籍出版社：";
cin >> publishing;
cout << endl << "添入书库的库存数量：";
cin >> inventory;
a.addnew(id, name, price, author, publishing, inventory);
}
else if (i == 2)
{
cout << "请输入您想要添加的书籍信息：\n";
cout << "书籍ID：";
cin >> id;
cout << endl << "书籍名字：";
cin >> name;
cout << endl << "书籍价格：";
cin >> price;
cout << endl << "书记作者：";
cin >> author;
cout << endl << "书籍出版社：";
cin >> publishing;
cout << endl << "添入书库的库存数量：";
cin >> inventory;
b.addnew(id, name, price, author, publishing, inventory);
}
else if (i == 3)
{
cout << "请输入您想要添加的书籍信息：\n";
cout << "书籍ID：";
cin >> id;
cout << endl << "书籍名字：";
cin >> name;
cout << endl << "书籍价格：";
cin >> price;
cout << endl << "书记作者：";
cin >> author;
cout << endl << "书籍出版社：";
cin >> publishing;
cout << endl << "添入书库的库存数量：";
cin >> inventory;
cout << endl << "该外刊的语言种类：";
cin >> language;
c.addnew(id, name, price, author, publishing, inventory, language);
}
}
Borrow AllLibaray::lend()
{
switch (i)
{
case 1:a.showAll(); return a.lend();
break;
case 2:b.showAll(); return b.lend();
break;
case 3:c.showAll(); return c.lend();
break;
}
}
void AllLibaray::add()
{
switch (i)
{
case 1:a.showAll(); a.add();
break;
case 2:b.showAll(); b.add();
break;
case 3:c.showAll(); c.add();
break;
}
}
void AllLibaray::searchBook()
{
switch (i)
{
case 1: a.searchBook();
break;
case 2: b.searchBook();
break;
case 3: c.searchBook();
break;
}
}
void AllLibaray::search()
{
switch (i)
{
case 1: a.search();
break;
case 2: b.search();
break;
case 3: c.search();
break;
}
}
void AllLibaray::erase()
{
switch (i)
{
case 1:a.showAll(); a.erase();
break;
case 2:b.showAll(); b.erase();
break;
case 3:c.showAll(); c.erase();
break;
}
}
void AllLibaray::showAll()
{
switch (i)
{
case 1: a.showAll();
break;
case 2: b.showAll();
break;
case 3: c.showAll();
break;
}
}
void AllLibaray::returnBook(Borrow& borrow)
{
a.returnBook(borrow);
b.returnBook(borrow);
c.returnBook(borrow);
}
-
代码中使用了goto语句，破坏了整体的结构性，重新优化结构以避免使用goto语句
-
进入登录或注册操作后，不成功登录或注册无法回到选择登录还是注册界面，如果用户误操作，就必须重新启动程序
-
用户在借书后，显示借书时间与实际时间不符
-
用户在精准查询时，可以输入，对于该书籍的评价，但在模糊搜寻后，若想要评价某一书籍，必须重新进入查询的精准查询功能，步骤繁琐
-
删除数据功能有误
-
删除书籍后，曾有对于书籍评价的文件还会存在，不会一并被删除
-
还书时，若书籍被删除，会出bug
-
输出的文字存在部分语法错误
- 新代码附上
代码中使用了goto语句，破坏了整体的结构性，重新优化结构以避免使用goto语句
auto manage = [&list, &lib]()
{
int j = 0;
lib.choice();
system("pause");
while (true)
{
system("cls");
cout << "请根据提示输入数字以进行操作" << endl;
cout << "1.重新选择书籍库 2.修改现有书籍数量 3.增添新的书籍" << endl;
cout << "4.删除书籍 5.显示本书籍库中所有书籍 6.查找书籍" << endl;
cout << "7.退出登录" << endl;
cin >> j;
system("cls");
switch (j)
{
case 1:lib.choice();
break;
case 2:lib.add();
break;
case 3:lib.addnew();
break;
case 4:lib.erase();
break;
case 5:lib.showAll();
break;
case 6:cout << "请选择查找书籍的方式:\n1.根据书籍id精确搜索 2.模糊搜索" << endl;
cin >> j;
if (j == 2)lib.search();
else lib.searchBook();
break;
}
if (j == 7)
{
break;
}
system("pause");
}
system("cls");
};
auto use = [&list, &lib](User& user)
{
if (user.getFine() != 0)
{
cout << "您有" << user.getFine() << "本书籍逾期，请尽快还书" << endl;
system("pause");
system("cls");
}
int j = 0;
lib.choice();
system("pause");
while (true)
{
system("cls");
cout << "请根据提示输入数字以进行操作" << endl;
cout << "1.重新选择书籍库 2.借阅书籍 3.借书管理" << endl;
cout << "4.显示本书籍库中所有书籍 5.查找书籍 6.退出登录" << endl;
cin >> j;
system("cls");
switch (j)
{
case 1:lib.choice();
break;
case 2:user.push_back(lib.lend());
break;
case 3:cout << "请根据提示输入数字以进行操作\n1.查看借阅信息 2.还书" << endl;
cin >> j;
system("cls");
if (j == 1)
{
user.showBorrow();
}
else if (j == 2)
{
if (user.hasBorrow())
{
bool p = true;
Borrow& borrow = user.returnBook(p);
if (p)
{
lib.returnBook(borrow);
cout << "还书成功" << endl;
}
}
else
{
cout << "尚无借书记录" << endl;
system("pause");
}
}
break;
case 4:lib.showAll();
break;
case 5:cout << "请选择查找书籍的方式:\n1.根据书籍id精确搜索 2.模糊搜索" << endl;
cin >> j;
if (j == 2)lib.search();
else lib.searchBook();
break;
}
if (j == 6)
{
break;
}
system("pause");
}
system("cls");
};
while (true)
{
system("cls");
cout << " 欢迎使用图书馆管理系统 " << endl;
cout << "请根据提示输入数字以进行操作" << endl;
cout << " 1.登录 2.注册 3.退出 " << endl;
cin >> i;
if (i == 1)
{
i = log();
if (i == -1)
{
manage();
}
else if (i == -2)
{
}
else
{
use(list[i]);
}
}
else if (i == 2)
{
reject();
}
else
{
break;
}
}
进入登录或注册操作后，不成功登录或注册无法回到选择登录还是注册界面，如果用户误操作，就必须重新启动程序
auto reject = [&list, &lib]()
{
string acc, pass, name;
system("cls");
cout << "\t注册(若想返回初始界面请于“账户：”输入return)" << endl;
cout << "账户:";
cin >> acc;
if (acc == "return")
{
return;
}
cout << "密码:";
cin >> pass;
cout << "用户名:";
cin >> name;
while (!list.reje(acc, pass, name))
{
system("cls");
cout << "\t注册账号重复,请重试(若想返回初始界面请于“账户：”输入return)\n账户:";
cin >> acc;
if (acc == "return")
{
return;
}
cout << "密码:";
cin >> pass;
cout << "用户名:";
cin >> name;
}
system("cls");
cout << " 注册成功" << endl;
system("pause");
};
auto log = [&list, &lib]()
{
system("cls");
int i; string acc, pass;
cout << "请选择以何种身份登录" << endl;
cout << "1.管理员 2.用户 " << endl;
cin >> i;
system("cls");
cout << "(若想返回初始界面请于“账户：”输入return)\n账户:";
cin >> acc;
if (acc == "return")
{
return -2;
}
cout << "密码:";
cin >> pass;
if (i == 1)
{
if (!list.loginManager(acc, pass))
{
do
{
system("cls");
cout << "账号密码错误，请重新输入(若想返回初始界面请于“账户：”输入return)\n";
cout << "账户:";
cin >> acc;
if (acc == "return")
{
return -2;
}
cout << "密码:";
cin >> pass;
} while (!list.loginManager(acc, pass));
}
system("cls");
cout << "登陆成功,欢迎管理员使用" << endl;
return -1;
}
else
{
int i;
if ((i = list.loginUser(acc, pass)) != -1)
{
system("cls");
cout << "登陆成功,欢迎用户" << list[i].getName()
<< "使用" << endl;
return i;
}
else
{
do
{
system("cls");
cout << "账号密码错误，请重新输入(若想返回初始界面请于“账户：”输入return)\n";
cout << "账户:";
cin >> acc;
if (acc == "return")
{
return -2;
}
cout << "密码:";
cin >> pass;
} while ((i = list.loginUser(acc, pass)) == -1);
system("cls");
cout << "登陆成功,欢迎用户" << list[i].getName()
<< endl;
return i;
}
}
};
用户在借书后所记录的借书时间与当前时间不符
Borrow::Borrow(std::string ID, std::string name, int day)
:ID(ID), name(name), begin(std::chrono::system_clock::now() + std::chrono::hours(8)), should(begin + std::chrono::days(day))
{
}
用户在精准查询时，可以输入，对于该书籍的评价，但在模糊搜寻后，若想要评价某一书籍，必须重新进入查询的精准查询功能，步骤繁琐
void search()
{
bool find = false;
string aim;
cout << "请输入您想要搜索的书籍拥有的信息：";
cin >> aim;
cout << endl;
system("cls");
for (T& book : list)
{
if (book.Search(aim))
{
book.ShowMe();
find = true;
}
}
if (!find)
{
cout << "提供信息：" << aim << endl << "没有找到符合条件的书籍" << endl;
}
else
{
char userDicision;
cout << "\n是否要进一步查看书籍信息(T/F)" << endl;
cin >> userDicision;
if (userDicision == 'T')
{
while (true)
{
system("cls");
cout << "请输入您想要进一步查看的书籍ID：" << endl;
string id;
cin >> id;
for (T& book : list)
{
if (book.get_id() == id)
{
cout << "1.查看书籍评价 2.评价书籍" << endl;
cin >> userDicision;
if (userDicision == '1')
{
book.dis_evalution();
}
else if (userDicision == '2')
{
book.evaluate();
}
return;
}
}
cout << "未找到ID为" << id << "的书籍。是否要从新输入(T/F)" << endl;
cin >> userDicision;
if (userDicision == 'F')
{
return;
}
}
}
}
}
删除数据功能有误
void erase()
{
string id;
cout << "请输入您想要删除的书籍ID：";
cin >> id;
cout << endl;
for (auto it = list.begin(); it != list.end(); ++it)
{
if (it->get_id() == id) {
system("cls");
std::cout << "已删除书籍: " << it->get_name() << std::endl;
std::filesystem::path deleteFileName = it->get_name() + ".txt";
if (std::filesystem::exists(deleteFileName))
{
std::filesystem::remove(deleteFileName);
}
list.erase(it);
return;
}
}
system("cls");
std::cout << "未找到ID为" << id << "的书籍。" << std::endl;
}
删除书籍后，曾有对于书籍评价的文件还会存在，不会一并被删除
std::filesystem::path deleteFileName = it->get_name() + ".txt";
if (std::filesystem::exists(deleteFileName))
{
std::filesystem::remove(deleteFileName);
}
还书时，若书籍被删除，会出bug
void returnBook(Borrow& borrow)
{
for (T& book : list) {
if (book.get_id() == borrow.getID()) {
++book;
break;
}
}
borrow.returnbook();
return;
}
输出的文字存在部分语法错误
cout << "\t注册账号重复,请重试(若想返回初始界面请于“账户：”输入return)\n账户:";
- 总结
本次逆向二次开发，难点在于理解其他人写的代码。Borrow类里超级长的返回值和复杂的STL库函数调用理解起来非常困难。此外，在阅读代码时，没有注释很难理解这段代码的作用是什么。例如，Borrow类构造函数中第二个成员变量赋值中给std::chrono::system_clock::now()加上了两个值，非常难以理解原因，在翻阅了STL库标准文档后才发现std::chrono::system_clock::now()是零时区的时间，换算成中国时间要加八个小时（ + std::chrono::hours(8)），而第二个值却是被错误的加上的，会导致程序出bug。
意识到了在开发过程中，注释和开发文档的重要性。
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