C++实现图书管理系统

#include 
#include 
#include 
#include 
#include 
#include 
 
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 link_book;       //保存书本信息
 list 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"<::iterator p = link_book.begin();
 while(p != link_book.end())
 {
 outfile<id<book_name<state<place<stu_number<stu_name<::iterator p = link_user.begin();
 while(p != link_user.end())
 {
 outfile<stu_number<stu_name<>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....."<>id;
 list::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"<>book_name;
 list::iterator p = link_book.begin();
 while(p != link_book.end())
 {
 if(strcmp(p->book_name,book_name) == 0)
 {
  cout<<"======================================="<id<book_name<state == 0)
  {
  cout<<"图书状态：未借阅!"<place<>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！"<>stu_id;
 int flag = 0;
 int flag1 = 0;
 list::iterator p = link_book.begin();
 while(p != link_book.end())
 {
 if(strcmp(p->stu_number,stu_id) == 0)
 {
  cout<<"==========================================="<id<book_name<>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！"<>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<>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::iterator it = link_user.begin();
 while(it != link_user.end())
 {
 cout<<"====================================="<stu_number<stu_name<>id;
 int flag = 0;
 list::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！"<>number;
 int flag = 0;
 list::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！"<::iterator p = link_book.begin();
 while(p != link_book.end())
 {
 if(p->state == 1)
 {
  cout<<"==================================================="<stu_name<stu_number<book_name<place<>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<>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::iterator p = link_book.begin();
 while(p != link_book.end())
 {
 cout<<"======================================="<id<book_name<state == 0)
 {
  cout<<"图书状态：未借阅!"<place<::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！"<::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<<"======================================="<id<book_name<state == 0)
  {
  cout<<"图书状态：未借阅!"<place<::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！"<