?? bookadmin.txt
字號:
#include <iostream.h>
#include <iomanip.h>
#include <string.h>
#include <fstream.h>
const int Maxr=100; //最多的讀者
const int Maxb=100; //最多的圖書
const int Maxbor=5; //每位讀者最多借5本書
class Reader //讀者類
{
int tag; //刪除標記1:已刪0:未刪
int no; //讀者編號
char name[10]; //讀者姓名
int borbook[Maxbor]; //所借圖書
public:
Reader() {}
char *getname() { return name; } //獲取姓名
int gettag() { return tag; } //獲取刪除標記
int getno() { return no; } //獲取讀者編號
void setname(char na[]) //設置姓名
{
strcpy(name,na);
}
void delbook() { tag=1; } //設置刪除標記
void addreader(int n,char *na) //增加讀者
{
tag=0;
no=n;
strcpy(name,na);
for (int i=0;i<Maxbor;i++)
borbook[i]=0;
}
void borrowbook(int bookid) //借書操作
{
for (int i=0;i<Maxbor;i++)
{
if (borbook[i]==0)
{
borbook[i]=bookid;
return;
}
}
}
int retbook(int bookid)//還書操作
{
for (int i=0;i<Maxbor;i++)
{
if (borbook[i]==bookid)
{
borbook[i]=0;
return 1;
}
}
return 0;
}
void disp()//輸出讀者信息
{
cout << setw(5) << no << setw(10) << name
<< " 借書編號:[";
for (int i=0;i<Maxbor;i++)
if (borbook[i]!=0)
cout << borbook[i] << "|";
cout << "]" << endl;
}
};
class RDatabase //讀者庫類
{
int top;//讀者記錄指針
Reader read[Maxr]; //讀者記錄
public:
RDatabase()//構造函數,將reader.txt讀到read[]中
{
Reader s;
top=-1;
fstream file("reader.txt",ios∷in);
while (1)
{
file.read((char *)&s,sizeof(s));
if (!file) break;
top++;
read[top]=s;
}
file.close();
}
void clear()//刪除所有讀者信息
{
top=-1;
}
int addreader(int n,char *na) //添加讀者時先查找是否存在
{
Reader *p=query(n);
if (p==NULL)
{
top++;
read[top].addreader(n,na);
return 1;
}
return 0;
}
Reader *query(int readerid) //按編號查找
{
for (int i=0;i<=top;i++)
if (read[i].getno()==readerid &&
read[i].gettag()==0)
return &read[i];
return NULL;
}
void disp()//輸出所有讀者信息
{
for (int i=0;i<=top;i++)
read[i].disp();
}
void readerdata(); //讀者庫維護
~RDatabase() //析構函數,將read[]寫入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()
{
int choice=1;
char rname[20];
int readerid;
Reader *r;
while (choice!=0)
{
cout << "讀者維護1:新增2:更改3:刪除4:查找5:顯示6:全刪
0:退出=>";
cin >> choice;
switch (choice)
{
case 1:
cout << " 輸入讀者編號:";
cin >> readerid;
cout << " 輸入讀者姓名:";
cin >> rname;
addreader(readerid,rname);
break;
case 2:
cout << " 輸入讀者編號:";
cin >> readerid;
r=query(readerid);
if (r==NULL)
{
cout << " 該讀者不存在" << endl;
break;
}
r->disp();
break;
case 5:
disp();
break;
case 6:
clear();
break;
}
}
}
class Book//圖書類
{
int tag; //刪除標記1:已刪0:未刪
int no; //圖書編號
char name[20]; //書名
int onshelf; //是否在架1:在架0:已借
public:
Book() {}
char *getname() { return name; } //獲取姓名
int getno() { return no; }//獲取圖書編號
int gettag() { return tag; } //獲取刪除標記
void setname(char na[]) //設置書名
{
strcpy(name,na);
}
void delbook() { tag=1; } //刪除圖書
void addbook(int n,char *na) //增加圖書
{
tag=0;
no=n;
strcpy(name,na);
onshelf=1;
}
int borrowbook() //借書操作
{
if (onshelf==1)
{
onshelf=0;
return 1;
}
return 0;
}
void retbook() //還書操作
{
onshelf=1;
}
void disp() //輸出圖書
{
cout << setw(6) << no << setw(18) << name << setw(10)
<< (onshelf==1? "在架":"已借") << endl;
}
};
class BDatabase //圖書庫類
{
int top; //圖書記錄指針
Book book[Maxb]; //圖書記錄
public:
BDatabase() //構造函數,將book.txt讀到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() //全刪
{
top=-1;
}
int addbook(int n,char *na) //增加圖書
{
Book *p=query(n);
if (p==NULL)
{
top++;
book[top].addbook(n,na);
return 1;
}
return 0;
}
Book *query(int bookid) //查找圖書
{
for (int i=0;i<=top;i++)
if (book[i].getno()==bookid &&
book[i].gettag()==0)
return &book[i];
return NULL;
}
void bookdata(); //圖書庫維護
void disp()
for (int i=0;i<=top;i++)
if (book[i].gettag()==0)
book[i].disp();
}
~BDatabase() //析構函數,將book[]寫入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()
{
int choice=1;
char bname[40];
int bookid;
Book *b;
while (choice!=0)
{
cout << "圖書維護1:新增2:更改3:刪除4:查找5:顯示6:全刪
0:退出=>";
cin >> choice;
switch (choice)
{
case 1:
cout << " 輸入圖書編號:";
cin >> bookid;
cout << " 輸入圖書書名:";
cin >> bname;
addbook(bookid,bname);
break;
case 2:
cout << " 輸入圖書編號:";
cin >> bookid;
b=query(bookid);
if (b==NULL)
{
cout << " 該圖書不存在" << endl;
break;
}
cout << " 輸入新的書名:";
cin >> bname;
b->setname(bname);
break;
case 3:
cout << " 輸入圖書編號:";
cin >> bookid;
b=query(bookid);
if (b==NULL)
{
cout << " 該圖書不存在" << endl;
break;
}
b->delbook();
break;
case 4:
cout << " 輸入圖書編號:";
cin >> bookid;
b=query(bookid);
if (b==NULL)
{
cout << " 該圖書不存在" << endl;
break;
}
b->disp();
break;
case 5:
disp();
break;
case 6:
clear();
break;
}
}
}
void main()
{
int choice=1,bookid,readerid;
RDatabase ReaderDB;
Reader *r;
BDatabase BookDB;
Book *b;
while(choice!=0)
{
cout << "1:借書2:還書3:圖書維護4:讀者維護0:離開=>";
cin >> choice;
switch (choice)
{
case 1:
cout << " 借書讀者編號:";
cin >> readerid;
cout << " 圖書編號:";
cin >> bookid;
r=ReaderDB.query(readerid);
if (r==NULL)
{
cout << " 不存在該讀者,不能借書" << endl;
break;
}
b=BookDB.query(bookid);
if (b==NULL)
{
cout << " 不存在該圖書,不能借書" << endl;
break;
}
if (b->borrowbook()==0)
{
cout << " 該圖書已借出,不能借書" << endl;
break;
}
r->borrowbook(b->getno());
break;
case 2:
cout << " 還書讀者編號:";
cin >> readerid;
cout << " 圖書編號:";
cin >> bookid;
r=ReaderDB.query(readerid);
if (r==NULL)
{
cout << " 不存在該讀者,不能還書" << endl;
break;
}
b=BookDB.query(bookid);
if (b==NULL)
{
cout << " 不存在該圖書,不能還書" << endl;
break;
}
b->retbook();
r->retbook(b->getno());
break;
case 3:
BookDB.bookdata();
break;
case 4:
ReaderDB.readerdata();
break;
}
}
}
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