c++写的图书管理系统

/*****************************************************************************************/ #include <iostream> #include <iomanip> #include <string> #include <fstream>//输入/输出文件流类 using namespace std; const int Maxr=100;//最多的读者 const int Maxb=100;//最多的图书 const int Maxbor=5;//每位读者最多借五本书 //读者类,实现对读者的信息的描述 class Reader { private: int tag; //删除标记 1:已删 0:未删 int no; //读者编号 char name[10]; //读者姓名 int borbook[Maxbor];//所借图书 public: Reader() {} char *getname() {return name;} //获取姓名 int gettag() {return tag;} //获取删除标记 int getno() {return no;} //获取读者编号 void setname(char na[]) //设置姓名 { strcpy(name,na); } void delbook(){ tag=1; }//设置删除标记 1:已删 0:未删 void addreader(int n,char *na)//增加读者 { tag=0; no=n; strcpy(name,na); for(int i=0;i<Maxbor;i++) borbook[i]=0; } void borrowbook(int bookid)//借书操作 { for(int i=0;i<Maxbor;i++) { if (borbook[i]==0) { borbook[i]=bookid; return; } } } int retbook(int bookid)//还书操作 { for(int i=0;i<Maxbor;i++) { if(borbook[i]==bookid) { borbook[i]=0; return 1; } } return 0; } void disp()//读出读者信息 { cout << setw(5) << no <<setw(10) << name<<"借书编号：["; for(int i=0;i<Maxbor;i++) if(borbook[i]!=0) cout << borbook[i] << "|"; cout << "]"<<endl; } }; //读者类库，实现建立读者的个人资料 class RDatabase { private: int top; //读者记录指针 Reader read[Maxr];//读者记录 public: RDatabase() //构造函数，将reader.txt读到read[]中 { Reader s; top=-1; fstream file("reader.txt",ios::in);//打开一个输入文件 while (1) { file.read((char *)&s,sizeof(s)); if (!file)break; top++; read[top]=s; } file.close(); //关闭 reader.txt } void clear()//删除所有读者信息 { top=-1; } int addreader(int n,char *na)//添加读者时先查找是否存在 { Reader *p=query(n); if (p==NULL) { top++; read[top].addreader(n,na); return 1; } return 0; } Reader *query(int readerid)//按编号查找 { for (int i=0;i<=top;i++) if (read[i].getno()==readerid && read[i].gettag()==0) { return &read[i]; } return NULL; } void disp() //输出所有读者信息 { for (int i=0;i<=top;i++) read[i].disp(); } void readerdata();//读者库维护 ~RDatabase() //析构函数，将read[]写到reader.txt文件中 { fstream file("reader.txt",ios::out); for (int i=0;i<=top;i++) if (read[i].gettag()==0) file.write((char *)&read[i],sizeof(read[i])); file.close(); } }; void RDatabase::readerdata() { char choice; char rname[20]; int readerid; Reader *r; while (choice!='0') { cout <<"\n\n\t\t\t读 者 维 护\n\n\n\t\t 1 新 增\n\n\t\t 2 更 改\n\n\t\t 3 删 除\n\n\t\t 4 查 找\n\n\t\t 5 显 示\n\n\t\t 6 全 删\n\n\t\t 0 退 出"<<endl; cin >> choice; switch (choice) { case '1': cout << "输入读者编号:"; cin >> readerid; cout << "输入读者姓名:"; cin >> rname; addreader (readerid,rname); break; case '2': cout << "输入读者编号:"; cin >> readerid; r=query(readerid); if (r==NULL) { cout << " 该读者不存在 "<<endl; break; } cout << "输入新的姓名:"; cin >> rname; r->setname(rname); break; case '3': cout << " 输入读者编号:"; cin >> readerid; r=query(readerid); if (r==NULL) { cout <<" 该读者不存在" << endl; break; } r->delbook(); break; case '4': cout << "读入读者编号:"; cin >> readerid; r=query(readerid); if (r==NULL) { cout <<"该读者不存在"<< endl; break; } r->disp(); break; case '5': disp(); break; case '6': clear(); break; default:cout<<"输入错误，请从新输入：";break; } } } //图书类，实现对图书的描述，图书的编号，书名，借出，还入等 class Book { private: int tag;//删除标记 1:已删 0:未删 int no;//图书编号 char name[20];//书名 int onshelf;//是否再架 1:再架 2:已借 public: Book(){} char *getname() { return name; }//获取姓名 int getno(){ return no; }//获取图书编号 int gettag(){ return tag; }//获取删除标记 void setname(char na[])//设置书名 { strcpy(name,na); } void delbook(){ tag=1;}//删除图书 void addbook(int n,char *na)//增加图书 { tag=0; no=n; strcpy(name,na); onshelf=1; } int borrowbook()//借书操作 { if (onshelf==1) { onshelf=0; return 1; } return 0; } void retbook()//还书操作 { onshelf=1; } void disp()//输出图书 { cout << setw(6) << no << setw(18) << name << setw(10) <<(onshelf==1? "在架":"已借") <<endl; } }; //图书库类，实现对图书的维护，查找，删除等 class BDatabase { private: int top; //图书记录指针 Book book[Maxb]; //图书记录 public: BDatabase()//构造函数，将book.txt读到book[]中 { Book b; top=-1; fstream file("book.txt",ios::in); while (1) { file.read((char *)&b,sizeof(b)); if (!file) break; top++; book[top]=b; } file.close(); } void clear()//全删 { top=-1; } int addbook(int n,char *na)//增加图书 { Book *p=query(n); if (NULL==p) { top++; book[top].addbook(n,na); return 1; } return 0; } Book *query(int bookid)//查找图书 { for (int i=0;i<=top;i++) if (book[i].getno()==bookid &&book[i].gettag()==0) { return &book[i]; } return NULL; } void bookdata();//图书库维护 void disp() { for (int i=0;i<=top;i++) if (book[i].gettag()==0) book[i].disp(); } ~BDatabase()//析构函数，将book[]写到book.txt文件中 { fstream file("book.txt",ios::out); for (int i=0;i<=top;i++) if (book[i].gettag()==0) file.write((char *)&book[i],sizeof(book[i])); file.close(); } }; void BDatabase::bookdata() { char choice; char bname[40]; int bookid; Book *b; while (choice!='0') { cout <<"\n\n\n\t\t\t图 书 维 护 "<<endl<<endl; cout<<"\t\t1 新 增\n \t\t2 更 改\n\t\t3 删 除\n\t\t4 查 找\n\t\t5 显 示\n\t\t6 全 删\n\t\t0 退 出"<<endl; cin >> choice; switch (choice) { case '1': cout << "输入图书编号:"<<endl; cin >> bookid; cout << "输入图书书名:"<<endl; cin >> bname; addbook(bookid,bname); break; case '2': cout << "输入图书编号:"<<endl; cin >> bookid; b=query(bookid); if (b==NULL) { cout << " 该图书不存在 "<<endl; break; } cout << "输入新的书名:"<<endl; cin >> bname; b->setname(bname); break; case '3': cout <<" 读入图书编号:"<<endl; cin >> bookid; b=query(bookid); if (b==NULL) { cout <<" 该图书不存在" << endl; break; } b->delbook(); break; case '4': cout << " 读入图书编号:"<<endl; cin >> bookid; b=query(bookid); if (b==NULL) { cout <<" 该图书不存在"<< endl; break; } b->disp(); break; case '5': disp(); break; case '6': clear(); break; default:cout<<"输入错误，请从新输入:"; } } } //main() 函数的实现，程序的主界面的引导 void main() { char choice; int bookid,readerid; RDatabase ReaderDB; Reader *r; BDatabase BookDB; Book *b; while(choice!='0') { cout <<endl<<endl<<"\t\t\t 图 书 管 理 系 统\n\n\n"; cout <<"\t\t\t1 借 书\n\n\t\t\t2