foreword
The overall functional requirements of the book lending management system :
The overall goal of the book lending management system: In the development environment of Visual Studio 2022, using the knowledge of C++ language and data structure learned, the program system is mainly realized to add books, query books, delete books, borrow books, and return books. Books; intelligent management processes such as adding members, querying members, deleting members, and borrowing information.
Mainly divided into two functions:
- Book management (adding books, querying books, deleting books, borrowing books, returning books);
- Member management (adding members, querying members, deleting members, borrowing information);
提示：以下是本篇文章正文内容，下面案例可供参考
1. Overall structure
Main function, library management class, membership management class
Two, detailed code
1. Main function
constexpr auto PASSWORD = "password.txt";
#include<fstream>
#include<iostream>
using namespace std;
#include<string>
#include"BookManage.h"
#include"MemberManage.h"
//菜单界面
void menu() {
cout << "\t 欢迎使用图书借阅系统" << endl;
cout << "\t 1、图书管理" << endl;
cout << "\t 2、会员管理" << endl;
cout << "\t 3、修改密码" << endl;
cout << "\t 0、退出系统" << endl;
cout << endl;
}
//获取密码
string getpassword() {
ifstream ifs;
ifs.open(PASSWORD, ios::in);
string val;
string password;
while (ifs>>val)
{
password = val;
}
ifs.close();
return password;
}
//保存密码
void savepassword(string mima ) {
ofstream ofs;
ofs.open(PASSWORD, ios::out);
ofs << mima;
ofs.close();
}
//系统登录
bool password(string mima) {
static string MiMa = getpassword();
if (MiMa == mima)
{
return true;
}
else
{
cout << "密码输入错误！" << endl;
system("pause");
system("cls");
return false;
}
}
int main()
{
//登陆界面
do
{
string mima;
cout << "\n\n\n\n\t\t\t\t请输入登录密码：";
cin >> mima;
bool temp = password(mima);
if (temp)
{
break;
}
} while (true);
system("cls");
//功能选择
menu();
do
{
int choice = 0;
cout << "请输入功能号：";
cin >> choice;
static bool fanhui = false;
system("pause");
system("cls");
switch (choice)
{
case 1: {
BookManage book;
do
{
int option;
cout << "请输入功能号：";
cin >> option;
switch (option)
{
case 1:
book.addbook();
break;
case 2:
book.showbook();
break;
case 3:
book.delete_book();
break;
case 4:
book.modify_condition();
break;
case 5:
book.search_book();
break;
case 6:
fanhui = true;
break;
default:
cout << "请输入正确的功能号！" << endl;
break;
}
} while (!fanhui);
system("cls");
menu();
fanhui = false;
break;
}
case 2:
{
MemberManage member;
do
{
int option;
cout << "请输入功能号：";
cin >> option;
switch (option)
{
case 1:
member.add();
break;
case 2:
member.show();
break;
case 3:
member.delete_mem();
break;
case 4:
member.modify();
break;
case 5:
member.search();
break;
case 6:
fanhui = true;
break;
default:
cout << "请输入正确的功能号！" << endl;
break;
}
} while (!fanhui);
system("cls");
menu();
fanhui = false;
break;
}
case 3:
{
do
{
string mima;
cout << "\n\n\n\n\t\t\t\t请输入登录密码：";
cin >> mima;
bool temp = password(mima);
if (temp)
{
cout << "请输入新密码：";
string xin_Mima;
cin >> xin_Mima;
static string MiMa = xin_Mima;
savepassword(xin_Mima);
cout << "修改成功！新密码：" << MiMa << endl;
break;
}
} while (true);
menu();
break;
}
case 0:
system("pause");
return 0;
default:
cout << "请输入正确的功能号！" << endl;
break;
}
} while (true);
return 0;
}Note: The program includes a password login feature. The main function writes functional functions such as obtaining passwords, saving passwords, checking passwords, and modifying passwords. The password is saved to password.txt under the project folder.
2. Book management
constexpr auto FILENAME ="bookfile.txt";
#include"BookManage.h"
#include<fstream>
BookManage::BookManage() {
menu();
//文件不存在
ifstream ifs;
ifs.open(FILENAME, ios::in);
if (!ifs.is_open())
{
this->bookarray = NULL;
this->arr_number = 0;
this->file_empty = true;
ifs.close();
return;
}
//文件为空
char c;
ifs >> c;
if (ifs.eof())
{
this->bookarray = NULL;
this->arr_number = 0;
this->file_empty = true;
ifs.close();
return;
}
//文件不为空
this->arr_number = this->getbook_num();
init_array();
this->file_empty = false;
}
int BookManage::getbook_num() {
ifstream ifs;
ifs.open(FILENAME, ios::in);
int number;
string name;
int price;
int condition;
int num = 0;
while (ifs>>number && ifs>>name && ifs>>price &&ifs>>condition)
{
num++;
}
ifs.close();
return num;
}
void BookManage::init_array() {
ifstream ifs;
ifs.open(FILENAME, ios::in);
int number;
string name;
int price;
int condition;
int num = this->getbook_num();
struct m_book* p = new m_book[num];
int i = 0;
while (ifs >> number && ifs >> name && ifs >> price && ifs >> condition)
{
p[i].m_number = number;
p[i].m_name = name;
p[i].m_price = price;
p[i].m_condition = condition;
i++;
}
this->bookarray = p;
ifs.close();
}
BookManage::~BookManage() {
if (this->bookarray != NULL)
{
delete[]this->bookarray;
this->bookarray = NULL;
}
}
void BookManage::menu() {
cout << "\t 1、增添图书信息" << endl;
cout << "\t 2、显示图书信息" << endl;
cout << "\t 3、删除图书信息" << endl;
cout << "\t 4、修改图书状态" << endl;
cout << "\t 5、查找图书信息" << endl;
cout << "\t 6、返回上一级界面" << endl;
cout << endl;
}
void BookManage::addbook() {
int val;
cout << "请输入你要录入几本书的信息：";
cin >> val;
struct m_book* p;
p = new m_book[val + arr_number];
if (this->bookarray != NULL)
{
for(int i = 0; i<this->arr_number; ++i)
{
p[i].m_number = this->bookarray[i].m_number;
p[i].m_name = this->bookarray[i].m_name;
p[i].m_price = this->bookarray[i].m_price;
p[i].m_condition = this->bookarray[i].m_condition;
}
}
for (int i = this->arr_number ; i < val + this->arr_number; i++)
{
int number;
string name;
int price;
bool condition;
cout << "请输入书的编号：" << endl;
cin >> number;
p[i].m_number = number;
cout << "请输入书的书名：" << endl;
cin >> name;
p[i].m_name = name;
cout << "请输入书的价格：" << endl;
cin >> price;
p[i].m_price = price;
cout << "请输入书的状态： 0、在馆 1、借出" << endl;
cin >> condition;
p[i].m_condition = condition;
}
delete[]this->bookarray;
this->arr_number += val;
this->bookarray = p;
savefile();
this->file_empty = false;
cout << "录入成功！" << endl;
}
void BookManage::showbook() {
for (int i = 0; i < this->arr_number; i++)
{
cout << "编号：" << this->bookarray[i].m_number << "\t";
cout << "书名：" << this->bookarray[i].m_name << "\t";
cout << "价格：" << this->bookarray[i].m_price << "\t";
cout << "状态：" <<( this->bookarray[i].m_condition ? "借出" : "在馆") << endl;
}
}
void BookManage::savefile() {
ofstream ofs;
ofs.open(FILENAME, ios::out);
for (int i = 0; i < this->arr_number; i++)
{
ofs << this->bookarray[i].m_number << " "
<< this->bookarray[i].m_name << " "
<< this->bookarray[i].m_price << " "
<< this->bookarray[i].m_condition << endl;
}
ofs.close();
}
int BookManage::index(int number) {
for (int i = 0; i < this->arr_number; i++)
{
if (this->bookarray[i].m_number == number)
{
return i;
}
}
return -1;
}
void BookManage::delete_book() {
cout << "请输入所要删除的图书的编号：";
int number;
cin >> number;
int val = index(number);
if (val == -1)
{
cout << "馆内无该编号图书信息，删除失败！" << endl;
}
else
{
for (int i = val; i < this->arr_number; i++)
{
this->bookarray[i].m_number = this->bookarray[i + 1].m_number;
this->bookarray[i].m_name = this->bookarray[i + 1].m_name;
this->bookarray[i].m_price = this->bookarray[i + 1].m_price;
this->bookarray[i].m_condition = this->bookarray[i + 1].m_condition;
}
this->arr_number--;
savefile();
cout << "删除成功！" << endl;
}
}
void BookManage::modify_condition() {
cout << "请输入所要修改的图书的编号：";
int number;
cin >> number;
int val = index(number);
if (val == -1)
{
cout << "馆内无该编号图书信息，修改失败！" << endl;
}
else
{
cout << "请选择该书的状态： 0、在馆 1、借出" << endl;
bool m;
cin >> m;
this->bookarray[val].m_condition = m;
savefile();
cout << "修改成功！" << endl;
}
}
void BookManage::search_book() {
cout << "请选择查询方式： 1、按图书编号查询 2、按图书书名查询" << endl;
int n;
cin >> n;
if (n == 1)
{
cout << "请输入图书的编号：";
int number;
cin >> number;
int val = index(number);
if (val == -1)
{
cout << "馆内无该编号图书信息，查找失败！" << endl;
}
else
{
cout << "编号：" << this->bookarray[val].m_number << "\t"
<< "书名：" << this->bookarray[val].m_name << "\t"
<< "价格：" << this->bookarray[val].m_price << "\t"
<< "状态：" << (this->bookarray[val].m_condition ? "借出" : "在馆") << endl;
}
}
if (n == 2)
{
cout << "请输入图书名：";
string name;
cin >> name;
int sign = 0;
for (int i = 0; i < this->arr_number; i++)
{
if(this->bookarray[i].m_name == name)
{
cout << "编号：" << this->bookarray[i].m_number << "\t"
<< "书名：" << this->bookarray[i].m_name << "\t"
<< "价格：" << this->bookarray[i].m_price << "\t"
<< "状态：" << (this->bookarray[i].m_condition ? "借出" : "在馆") << endl;
++sign;
}
}
if (sign == 0)
{
cout << "馆内无该书名的图书，查找失败！" << endl;
}
}
}3. Member management
#include"MemberManage.h"
#include<fstream>
MemberManage::MemberManage() {
menu();
//文件不存在
ifstream ifs;
ifs.open("member.txt", ios::in);
if (!ifs.is_open())
{
this->mem_array = NULL;
this->array_num = 0;
this->file_empty = true;
ifs.close();
return;
}
//文件为空
char c;
ifs >> c;
if (ifs.eof())
{
this->mem_array = NULL;
this->array_num = 0;
this->file_empty = true;
ifs.close();
return;
}
//文件不为空
this->array_num = this->get_num();
init_array();
this->file_empty = false;
}
MemberManage::~MemberManage() {
if (this->mem_array != NULL)
{
delete[]this->mem_array;
this->mem_array = NULL;
}
}
void MemberManage::menu() {
cout << "\t 1、增添会员信息" << endl;
cout << "\t 2、显示会员信息" << endl;
cout << "\t 3、删除会员信息" << endl;
cout << "\t 4、修改借书信息" << endl;
cout << "\t 5、查找会员信息" << endl;
cout << "\t 6、返回上一级界面" << endl;
cout << endl;
}
int MemberManage::get_num() {
ifstream ifs;
ifs.open("member.txt", ios::in);
int id;
string name;
int sex;
string imfo;
int num = 0;
while (ifs >> id && ifs >> name && ifs >> sex && ifs >> imfo)
{
num++;
}
ifs.close();
return num;
}
void MemberManage::init_array() {
ifstream ifs;
ifs.open("member.txt", ios::in);
int id;
string name;
int sex;
string imfo;
int num = this->get_num();
struct m_member* p = new m_member[num];
int i = 0;
while (ifs>>id && ifs>>name && ifs>>sex && ifs>>imfo)
{
p[i].id = id;
p[i].name = name;
p[i].sex = sex;
p[i].imfo = imfo;
i++;
}
this->mem_array = p;
ifs.close();
}
void MemberManage::save() {
ofstream ofs;
ofs.open("member.txt", ios::out);
for (int i = 0; i < this->array_num; i++)
{
ofs << this->mem_array[i].id << " "
<< this->mem_array[i].name << " "
<< this->mem_array[i].sex << " "
<< this->mem_array[i].imfo << endl;
}
ofs.close();
}
void MemberManage::add(){
int id;
string name;
int sex;
string imfo;
cout << "请输入会员卡号：" ;
cin >> id;
cout << "请输入会员姓名：";
cin >> name;
cout << "请选择会员性别： 1、男 2女 ";
cin >> sex;
cout << "请输入会员的借阅信息：";
cin >> imfo;
if (this->mem_array == NULL)
{
this->mem_array = new m_member;
}
int num = this->get_num();
struct m_member* p = new m_member[num + 1];
for (int i = 0; i < num; i++)
{
p[i].id = this->mem_array[i].id;
p[i].name = this->mem_array[i].name;
p[i].sex = this->mem_array[i].sex;
p[i].imfo = this->mem_array[i].imfo;
}
p[num].id = id;
p[num].name = name;
p[num].sex = sex;
p[num].imfo = imfo;
delete[]this->mem_array;
this->mem_array = p;
this->array_num++;
save();
cout << "录入成功！" << endl;
}
void MemberManage::show() {
for (int i = 0; i < this->array_num; i++)
{
cout << "卡号：" << this->mem_array[i].id << "\t";
cout << "姓名：" << this->mem_array[i].name << "\t";
cout << "性别：" << (this->mem_array[i].sex == 1 ? "男" : "女") << "\t";
cout << "借阅信息：" << this->mem_array[i].imfo << endl;
}
}
int MemberManage::index(int id) {
for (int i = 0; i < this->array_num; i++)
{
if (this->mem_array[i].id == id)
{
return i;
}
}
return -1;
}
void MemberManage::delete_mem() {
cout << "请输入会员的卡号：" << endl;
int id;
cin >> id;
int m = index(id);
if (m == -1)
{
cout << "系统内无相应卡号持有者的信息，删除失败！" << endl ;
}
else
{
for (int i = m; i < this->array_num; i++)
{
this->mem_array[i].id = this->mem_array[i + 1].id;
this->mem_array[i].name = this->mem_array[i + 1].name;
this->mem_array[i].sex = this->mem_array[i + 1].sex;
this->mem_array[i].imfo = this->mem_array[i + 1].imfo;
}
this->array_num--;
save();
cout << "删除成功！" << endl;
}
}
void MemberManage::search() {
cout << "请输入会员的卡号：" << endl;
int id;
cin >> id;
int m = index(id);
if (m == -1)
{
cout << "系统内无相应卡号持有者的信息，搜索失败！" << endl;
}
else
{
cout << "卡号：" << this->mem_array[m].id << "\t"
<< "姓名：" << this->mem_array[m].name << "\t"
<< "性别：" << (this->mem_array[m].sex == 1 ? "男" : "女") << "\t"
<< "借阅信息：" << this->mem_array[m].imfo;
this->array_num--;
}
}
void MemberManage::modify() {
cout << "请输入会员的卡号：" << endl;
int id;
cin >> id;
int m = index(id);
if (m == -1)
{
cout << "系统内无相应卡号持有者的信息，修改失败！" << endl;
}
else
{
cout << "会员为姓名：" << this->mem_array[m].name << endl;
cout << "请输入该会员的新的借阅信息：" << endl;
string imfo;
cin >> imfo;
this->mem_array[m].imfo = imfo;
save();
cout << "修改成功！" << endl;
}
}
