C语言程序设计的图书管理系统

#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() //获取姓名

int gettag() //获取删除标记

int getno() //获取读者编号

void setname(char na[]) //设置姓名

{

strcpy(name,na);

}

void delbook()//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

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() //获取姓名

int getno()//获取图书编号

int gettag()//获取删除标记

void setname(char na[])//设置书名

{

strcpy(name,na);

}

void delbook()//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c语言图书管理系统程序设计，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].getf()>book[i+1].getf())。 * json format:{"book":[{"bookid":123,"bookname":"newbook"},{"bookid":456,"bookname":"newbook2"}]} 。i am terribly sorry to tell you that i have lost the valuable book you were so kind to lend me last week. i read it everyday and intended to finish it next month. last night when i came to my room, it was nowhere to be found. i will try to recover it as soon as possible. if i fail to find it, i will get a new book for you.。

{

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);

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