C++实现图书管理系统

闲来无事，用C++做了一个图书管理系统，主要有借书、还书、图书管理、用户管理等功能，主要用到的技术有容器和文件，以及类的封装

#include <iostream>
#include <list>
#include <algorithm>
#include <string.h>
#include <fstream>
#include <stdlib.h>

using namespace std;
class Mybook;
class Book;

class Book{
public:
int id;              //书号
char book_name[20];        //书名
int state;            //图书状态
char place[20];          //图书所在位置
char stu_number[20];       //学号
char stu_name[20];        //学生姓名
public:
Book();
friend class Mybook;
};

class User{
public:
char stu_number[20];        //学号
char stu_name[20];         //学生姓名
public:
User()
{
 strcpy(stu_number,"000");
 strcpy(stu_name,"0");
}
friend class Mybook;
};

class Mybook{
private:
list<Book> link_book;       //保存书本信息
list<User> link_user;       //保存用户信息
public:
int main_menu();          //主菜单
void getmenu();          //获取菜单
int menu();            //图书管理菜单
void getchoice();         //输入选择
void add_book();          //添加图书
void display_book();        //显示图书信息
void del_book();          //删除图书信息
void search_book();        //搜索图书信息
void update_book();        //修改图书信息
void borrow_book();        //借书
void return_book();        //还书
int menu_user();         //管理用户菜单
void add_user();          //添加用户
void del_user();          //删除用户
void display_user();        //查看用户
void update_user();        //修改用户
void look_borrow();        //查看借阅图书情况
void get_user();          //用户管理
void recv_file();         //将数据保存到文件中
void read_file();         //将数据从文件中读取
void recv_user();         //将用户信息保存到文件
void read_user();         //将用户信息从文件读取
};

Book::Book()
{
state = 0;
strcpy(stu_number,"000");
strcpy(stu_name,"0");
}
//保存图书信息到文件
void Mybook::recv_file()
{
ofstream outfile("library.txt",ios::out);
if(!outfile)
{
cout<<"文件打开失败"<<endl;
return ;
}
sleep(1);
list<Book>::iterator p = link_book.begin();
while(p != link_book.end())
{
outfile<<p->id<<endl;
outfile<<p->book_name<<endl;
outfile<<p->state<<endl;
outfile<<p->place<<endl;
outfile<<p->stu_number<<endl;
outfile<<p->stu_name<<endl;
p++;
}
cout<<"保存完成！"<<endl;
outfile.close();
}

void Mybook::read_file()
{
ifstream infile("library.txt",ios::in);
Book new_book;
if(!infile)
{
cout<<"read fail"<<endl;
return ;
}
char temp[20];
while(!infile.eof())
{
infile.getline(temp,'\n');
new_book.id = atoi(temp);
memset(temp,0,20);
infile.getline(new_book.book_name,'\n');
infile.getline(temp,'\n');
new_book.state = atoi(temp);
memset(temp,0,20);
infile.getline(new_book.place,'\n');
infile.getline(new_book.stu_number,'\n');
infile.getline(new_book.stu_name,'\n');
if(infile.eof())
{
 break;
}
link_book.push_back(new_book);
}
infile.close();
}
//保存用户信息
void Mybook::recv_user()
{
ofstream outfile("user.txt",ios::out);
if(!outfile)
{
cout<<"文件打开失败"<<endl;
return ;
}
sleep(1);
list<User>::iterator p = link_user.begin();
while(p != link_user.end())
{
outfile<<p->stu_number<<endl;
outfile<<p->stu_name<<endl;
p++;
}
cout<<"保存完成！"<<endl;
outfile.close();
}
//读取数据至用户
void Mybook::read_user()
{
ifstream infile("user.txt",ios::in);
if(!infile)
{
cout<<"文件打开失败！"<<endl;
return ;
}
User new_user;
while(!infile.eof())
{
infile.getline(new_user.stu_number,'\n');
infile.getline(new_user.stu_name,'\n');
if(infile.eof())
{
 break;
}
link_user.push_back(new_user);
}
infile.close();
}
//主菜单
int Mybook::main_menu()
{
int choice = 0;
cout<<"\t\t\t\t===================================================="<<endl;
cout<<"\t\t\t\t*       欢迎来到图书管理系统        *"<<endl;
cout<<"\t\t\t\t*--------------------------------------------------*"<<endl;
cout<<"\t\t\t\t*         1、借书             *"<<endl;
cout<<"\t\t\t\t*         2、还书             *"<<endl;
cout<<"\t\t\t\t*         3、图书管理           *"<<endl;
cout<<"\t\t\t\t*         4、用户管理           *"<<endl;
cout<<"\t\t\t\t*         0、保存并退出          *"<<endl;
cout<<"\t\t\t\t*__________________________________________________*"<<endl;
cout<<"\t\t\t\t\t请输入选择:";
cin>>choice;
while(!(choice >= 0 && choice <= 4))
{
cout<<"输入错误，请重新输入:";
cin>>choice;
}
return choice;
}
//执行主菜单
void Mybook::getmenu()
{
int choice = 0;
read_user();
read_file();
while(1)
{
system("clear");
choice = main_menu();
switch(choice)
{
 case 1:
 {
 borrow_book();
 break;
 }
 case 2:
 {
 return_book();
 break;
 }
 case 3:
 {
 getchoice();
 break;
 }
 case 4:
 {
 get_user();
 break;
 }
 case 0:
 {
 cout<<"正在保存，请稍后....."<<endl;
 recv_file();
 exit(0);
 }
}
cout<<endl<<endl<<endl;
cout<<"按任意键返回...";
getchar();
getchar();
}
}
//借书
void Mybook::borrow_book()
{
int flag = 0;
int flag1 = 0;
int flag2 = 0;
char id[20];
char name[20];
char book_name[20];
cout<<"请输入学号:";
cin>>id;
list<User>::iterator it = link_user.begin();
while(it != link_user.end())
{
if(strcmp(it->stu_number,id) == 0)
{
 strcpy(name,it->stu_name);
 flag2 = 1;
 break;
}
it++;
}
if(flag2 == 0)
{
cout<<"你没有借书权限！借书失败"<<endl;
return ;
}
cout<<"请输入书名：";
cin>>book_name;
list<Book>::iterator p = link_book.begin();
while(p != link_book.end())
{
if(strcmp(p->book_name,book_name) == 0)
{
 cout<<"======================================="<<endl;
 cout<<"书号:"<<p->id<<endl;
 cout<<"书名:"<<p->book_name<<endl;
 if(p->state == 0)
 {
 cout<<"图书状态：未借阅!"<<endl;
 }
 else
 {
 cout<<"图书状态：已借阅!"<<endl;
 }
 cout<<"所在书架"<<p->place<<endl;
 flag1 = 1;
}
p++;
}
if(flag1 == 0)
{
cout<<"你所借阅的书不存在，借书失败！";
return ;
}
p = link_book.begin();
cout<<"已查找该图书，请输入书号进行借阅：";
int book_id;
cin>>book_id;
while(p != link_book.end())
{
if(strcmp(p->book_name,book_name) == 0 && p->id == book_id && p->state == 0)
{
 strcpy(p->stu_number,id);
 strcpy(p->stu_name,name);
 p->state = 1;
 cout<<"借书成功！"<<endl;
 flag = 1;
 break;
}
p++;
}
if(flag == 0)
{
cout<<"该书已被借阅，借书失败！";
}

}
//还书
void Mybook::return_book()
{
char stu_id[20];
cout<<"请输入学号";
cin>>stu_id;
int flag = 0;
int flag1 = 0;
list<Book>::iterator p = link_book.begin();
while(p != link_book.end())
{
if(strcmp(p->stu_number,stu_id) == 0)
{
 cout<<"==========================================="<<endl;
 cout<<"书号："<<p->id<<endl;
 cout<<"书名："<<p->book_name<<endl;
 flag = 1;
}
p++;
}
if(flag == 0)
{
cout<<"当前没有您没有借书"<<endl;
return ;
}
else if(flag == 1)
{
cout<<"已经查询到你借阅的图书，请输入书号进行归还:"<<endl;
}
int id;
cin>>id;
p = link_book.begin();
while(p != link_book.end())
{
if(strcmp(p->stu_number,stu_id) == 0&&p->id == id)
{
 strcpy(p->stu_name ,"000");
 strcpy(p->stu_number , "0");
 p->state = 0;
 cout<<"还书成功！"<<endl;
 flag1 = 1;
 break;
}
p++;
}
if(flag1 == 0)
{
cout<<"输入书号错误，还书失败！"<<endl;
}
}
//用户管理菜单
int Mybook::menu_user()
{
int choice = 0;
cout<<"\t\t\t\t=========================================="<<endl;
cout<<"\t\t\t\t*       用户管理          *"<<endl;
cout<<"\t\t\t\t*----------------------------------------*"<<endl;
cout<<"\t\t\t\t*     1、添加用户          *"<<endl;
cout<<"\t\t\t\t*     2、显示用户          *"<<endl;
cout<<"\t\t\t\t*     3、删除用户          *"<<endl;
cout<<"\t\t\t\t*     4、修改用户          *"<<endl;
cout<<"\t\t\t\t*     5、显示图书借用信息      *"<<endl;
cout<<"\t\t\t\t*     6、保存并返回上一层      *"<<endl;
cout<<"\t\t\t\t*----------------------------------------*"<<endl;
cout<<"\t\t\t\t\t请输入选择:";
cin>>choice;
while(!(choice >= 1 && choice <= 6))
{
cout<<"输入错误，请重新输入:";
cin>>choice;
}
return choice;

}
//执行用户管理
void Mybook::get_user()
{
int choice = 0;
while(1)
{
system("clear");
choice = menu_user();
system("clear");
switch(choice)
{
 case 1:
 {
 add_user();
 break;
 }
 case 2:
 {
 display_user();
 break;
 }
 case 3:
 {
 del_user();
 break;
 }
 case 4:
 {
 update_user();
 break;
 }
 case 5:
 {
 look_borrow();
 break;
 }
 case 6:
 {
 recv_user();
 return ;
 }
}
cout<<endl<<endl<<endl;
cout<<"按任意键返回...";
getchar();
getchar();
}
}
//添加用户
void Mybook::add_user()
{
User new_user;
cout<<"请输入学号：";
cin>>new_user.stu_number;
cout<<"请输入姓名：";
cin>>new_user.stu_name;

link_user.push_back(new_user);
cout<<"添加成功！";
cout<<"是否继续添加(y/n)";
char ch;
cin>>ch;
while(!(ch == 'Y'||ch == 'y'||ch == 'N'||ch == 'n'))
{
cout<<"输入有误，请重新输入：";
cin>>ch;
}
if(ch == 'Y'||ch == 'y')
{
system("clear");
add_user();
}
}
//显示用户
void Mybook::display_user()
{
list<User>::iterator it = link_user.begin();
while(it != link_user.end())
{
cout<<"====================================="<<endl;
cout<<"学号："<<it->stu_number<<endl;
cout<<"姓名："<<it->stu_name<<endl<<endl;
it++;
}
}
//删除用户
void Mybook::del_user()
{
char id[20];
cout<<"请输入你要删除的学生学号：";
cin>>id;
int flag = 0;
list<User>::iterator it = link_user.begin();
while(it != link_user.end())
{
if(strcmp(it->stu_number,id) == 0)
{
 link_user.erase(it);
 flag = 1;
 break;
}
it++;
}
if(flag == 1)
{
cout<<"删除成功！"<<endl;
}
else
{
cout<<"你删除的用户不存在，删除失败！"<<endl;
}
}
//修改用户信息
void Mybook::update_user()
{
cout<<"请输入你要修改的学号："<<endl;
char number[20];
cin>>number;
int flag = 0;
list<User>::iterator it = link_user.begin();
while(it != link_user.end())
{
if(strcmp(it->stu_number,number) == 0)
{
 cout<<"请更新学号：";
 cin>>it->stu_number;
 cout<<"请更新姓名：";
 cin>>it->stu_name;
 flag = 1;
 break;
}
it++;
}
if(flag == 1)
{
cout<<"修改成功！"<<endl;
}
else
{
cout<<"修改失败！"<<endl;
}
}
//查看已借阅图书情况
void Mybook::look_borrow()
{
int flag = 0;
list<Book>::iterator p = link_book.begin();
while(p != link_book.end())
{
if(p->state == 1)
{
 cout<<"==================================================="<<endl;
 cout<<"姓名："<<p->stu_name<<endl;
 cout<<"学号："<<p->stu_number<<endl;
 cout<<"书名："<<p->book_name<<endl;
 cout<<"书架号："<<p->place<<endl;
 flag = 1;
}
p++;
}
if(flag == 1)
{
cout<<"已查询图书相关借阅信息"<<endl;
}
else
{
cout<<"目前暂时没有相关图书借阅!"<<endl;
}
}
//图书管理菜单
int Mybook::menu()
{
int choice = 0;
cout<<"\t\t\t\t\t============================================"<<endl;
cout<<"\t\t\t\t\t*       图书管理      *"<<endl;
cout<<"\t\t\t\t\t*------------------------------------------*"<<endl;
cout<<"\t\t\t\t\t* 1、添加图书信息   2、显示图书信息   *"<<endl;
cout<<"\t\t\t\t\t*------------------------------------------*"<<endl;
cout<<"\t\t\t\t\t* 3、删除图书信息   4、搜索图书信息   *"<<endl;
cout<<"\t\t\t\t\t*------------------------------------------*"<<endl;
cout<<"\t\t\t\t\t* 5、更新图书信息   6、返回上一层    *"<<endl;
cout<<"\t\t\t\t\t*------------------------------------------*"<<endl;
cout<<"\t\t\t\t\t请输入选择:";
cin>>choice;
while(!(choice >= 1 && choice <= 6))
{
cout<<"输入错误，请重新输入:";
cin>>choice;
}
return choice;

}
//实行图书管理
void Mybook::getchoice()
{
int choice = 0;
while(1)
{
system("clear");
choice = menu();
system("clear");
switch(choice)
{
 case 1:
 {
 add_book();
 break;
 }
 case 2:
 {
 display_book();
 break;
 }
 case 3:
 {
 del_book();
 break;
 }
 case 4:
 {
 search_book();
 break;
 }
 case 5:
 {
 update_book();
 break;
 }
 case 6:
 {
 return ;
 }
}
cout<<endl<<endl<<endl;
cout<<"按任意键返回....."<<endl;
getchar();
getchar();
}
}
//增加书本
void Mybook::add_book()
{
Book new_book;
cout<<"请输入书号：";
cin>>new_book.id;
cout<<"请输入书名：";
cin>>new_book.book_name;
cout<<"请输入图书书架：";
cin>>new_book.place;

link_book.push_back(new_book);
cout<<"添加成功！";
cout<<"是否继续添加(y/n)";
char ch;
cin>>ch;
while(!(ch == 'Y'||ch == 'y'||ch == 'N'||ch == 'n'))
{
cout<<"输入有误，请重新输入：";
cin>>ch;
}
if(ch == 'Y'||ch == 'y')
{
system("clear");
add_book();
}
}
//显示书本信息
void Mybook::display_book()
{
list<Book>::iterator p = link_book.begin();
while(p != link_book.end())
{
cout<<"======================================="<<endl;
cout<<"书号:"<<p->id<<endl;
cout<<"书名:"<<p->book_name<<endl;
if(p->state == 0)
{
 cout<<"图书状态：未借阅!"<<endl;
}
else
{
 cout<<"图书状态：已借阅!"<<endl;
}
cout<<"所在书架"<<p->place<<endl<<endl;
p++;
}
}
//删除书本信息
void Mybook::del_book()
{
list<Book>::iterator p = link_book.begin();
int num = 0;
int flag = 0;
cout<<"请输入你要删除的书号：";
cin>>num;
while(p != link_book.end())
{
if(p->id == num)
{
 link_book.erase(p);
 flag = 1;
 break;
}
p++;
}
if(flag == 1)
{
cout<<"\n\n删除完成!";
}
else
{
cout<<"\n\n该书不存在，删除失败！"<<endl;
}
}
//搜索书本信息
void Mybook::search_book()
{
list<Book>::iterator p = link_book.begin();
char book_name[20];
int flag = 0;
cout<<"请输入你要查找的书名：";
cin>>book_name;
while(p != link_book.end())
{
if(strcmp(p->book_name,book_name) == 0)
{
 cout<<"======================================="<<endl;
 cout<<"书号:"<<p->id<<endl;
 cout<<"书名:"<<p->book_name<<endl;
 if(p->state == 0)
 {
 cout<<"图书状态：未借阅!"<<endl;
 }
 else
 {
 cout<<"图书状态：已借阅!"<<endl;
 }
 cout<<"所在书架"<<p->place<<endl;
 flag = 1;
}
p++;
}
if(flag == 1)
{
cout<<"\n\n查找完成!";
}
else
{
cout<<"\n\n目前图书馆暂无此书！"<<endl;
}
}
//修改书本信息
void Mybook::update_book()
{
list<Book>::iterator p = link_book.begin();
int num = 0;
int flag = 0;
cout<<"请输入你要更新的书号：";
cin>>num;
while(p != link_book.end())
{
if(p->id == num)
{
 cout<<"请输入书名";
 cin>>p->book_name;
 cout<<"请输入图书书架号:";
 cin>>p->place;
 flag = 1;
}
p++;
}
if(flag == 1)
{
cout<<"\n\n更新完成!";
}
else
{
cout<<"\n\n该书不存在，更新失败！"<<endl;
}
}
int main()
{
 Mybook b;
b.getmenu();

return 0;
}

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来源：https://blog.csdn.net/qq_38076413/article/details/76263505