图书管理系统C代码.doc

#include <iostream>
#include <iomanip>
#include <string>
#include <fstream>

using namespace std;
const int Reader=100;
const int Maxb=100;
const int Bor=5;

class Student
{
private:
int tag;

int number;

char name[10];

int borbook[Bor];
public:

Student() { }

char *getname()
{
return name;
}

int gettag()
{
return tag;
}

int getnumber()
{
return number;
}

void setname(char *na)
{
strcpy(name,na);

}

void delbook()
{
tag=1;
}

void addStudent(int n,char *na)
{
tag=0;

number=n;

strcpy(name,na);

for(int i=0;i<Bor;i++)
borbook[i]=0;
}

void borrowbook(int bookid)//借书操作
{
for(int i=0;i<Bor;i++)
{

if (borbook[i]==0)

{
borbook[i]=bookid;
return;
}
}

}
int retbook(int bookid)//还书操作
{
for(int i=0;i<Bor;i++)
{

if(borbook[i]==bookid)
{
borbook[i]=0;
return 1;

}
}
return 0;
}
void output()//读出读者信息
{
cout << setw(5) << number <<setw(10) << name<<"借书编号：[";

for(int i=0;i<Bor;i++)
if(borbook[i]!=0)

cout << borbook[i] << "|";

cout << "]"<<endl;

}
};

class RData
{
private:
int top; //读者记录指针

Student read[Reader];
public:

RData() //构造函数，将Student.txt读到read[]中
{
Student s;

top=-1;

fstream file("Student.txt",ios::in);//打开一种输入文献

while (1)
{
file.read((char *)&s,sizeof(s));

if (!file)break;

top++;

read[top]=s;

}
file.close();
}
void clear()
{
top=-1;
}

int addStudent(int n,char *na)//查找与否存在
{

Student *p=equal(n);
if (p==NULL)
{
top++;
read[top].addStudent(n,na);
return 1;
}

return 0;

}
Student *equal(int Studentid)//按编号查找
{

for (int i=0;i<=top;i++)

if (read[i].getnumber()==Studentid &&

read[i].gettag()==0)
{
return &read[i];
}

return NULL;

}
void output()
{
for (int i=0;i<=top;i++)

read[i].output();
}

void Studentdata();//读者库维护

~RData() //析构函数，将read[]写到Student.txt文献中
{

fstream file("Student.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 RData::Studentdata()
{

char choice;
char rname[20];
int Studentid;
Student *r;

while (choice!='0')
{

cout<<" ┏━━━━━━━━━━━━━┓\n";
cout<<" ┃ 读 者 维 护 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃1.新 增 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃2.更 改 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃3.删 除 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃4.查 找 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃5.显 示 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃6.全 删 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃0.退出 ┃\n";
cout<<" ┗━━━━━━━━━━━━━┛\n";
//cout<<
cin >> choice;

switch (choice)

{

case '1':

cout << "输入读者编号:";
cin >> Studentid;
cout << "输入读者姓名:";
cin >> rname;
addStudent (Studentid,rname);
break;

case '2':
cout << "输入读者编号:";
cin >> Studentid;
r=equal(Studentid);

if (r==NULL)
{
cout << " 该读者不存在 "<<endl;
break;
}
cout << "输入新旳姓名:";
cin >> rname;
r->setname(rname);
break;

case '3':
cout << " 输入读者编号:";
cin >> Studentid;
r=equal(Studentid);

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 >> Studentid;
r=equal(Studentid);
if (r==NULL)

{
cout <<"该读者不存在"<< endl;
break;
}
r->output();
break;

case '5':
output();
break;

case '6':
clear();
break;
default:cout<<"退出：\n";system("cls");break;
}
}
}

class Book
{
private:
int tag;

int number;

char name[20];

int onshelf;

public:
Book(){}

char *getname()
{
return name;
}
int getnumber()
{
return number;
}
int gettag()
{
return tag;
}
void setname(char na[])
{
strcpy(name,na);
}
void delbook()
{
tag=1;
}
void addbook(int n,char *na)
{
tag=0;

number=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 output()//输出图书
{
cout << setw(6) << number << setw(18) << name << setw(10)
<<(onshelf==1? "在架":"已借") <<endl;
}
};

class BDatabase
{
private:

int top;
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()
{
top=-1;
}

int addbook(int n,char *na)
{
Book *p=equal(n);
if (NULL==p)
{
top++;

book[top].addbook(n,na);
return 1;
}

return 0;
}

Book *equal(int bookid)
{
for (int i=0;i<=top;i++)

if (book[i].getnumber()==bookid &&book[i].gettag()==0)
{
return &book[i];
}
return NULL;
}

void bookdata();

void output()
{

for (int i=0;i<=top;i++)

if (book[i].gettag()==0)

book[i].output();
}

~BDatabase()//析构函数，将book[]写到book.txt文献中
{

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";
cout<<" ┃ 图书 维 护 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃1.新 增 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃2.更 改 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃3.删 除 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃4.查 找 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃5.显 示 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃6.全 删 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃0.退出 ┃\n";
cout<<" ┗━━━━━━━━━━━━━┛\n";
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=equal(bookid);
if (b==NULL)
{
cout << " 该图书不存在 "<<endl;
break;
}

cout << "输入新旳书名:"<<endl;
cin >> bname;
b->setname(bname);
break;

case '3':

cout <<" 读入图书编号:"<<endl;
cin >> bookid;
b=equal(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=equal(bookid);
if (b==NULL)

{

cout <<" 该图书不存在"<< endl;
break;
}

b->output();
break;

case '5':

output();
break;

case '6':
clear();
break;

default:cout<<"退出\n"; system("cls"); break;
}
}
}

void main()
{

char choice;

int bookid,Studentid;

RData StudentDB;

Student *r;

BDatabase BookDB;

Book *b;

while(choice!='0')

{

cout<<" ┏━━━━━━━━━━━━━┓\n";
cout<<" ┃ 图 书 管 理 系 统 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃1.借书 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃2.还书 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃3.图书维护 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃4.读者维护 ┃\n";
cout<<" ┃━━━━━━━━━━━━━┃\n";
cout<<" ┃0.退出 ┃\n";
cout<<" ┗━━━━━━━━━━━━━┛\n";

cin >> choice;

switch (choice)

{

case '1': system("cls");
cout <<" 借书 读者编号:";
cin >>Studentid;
cout <<" 图书编号： ";
cin >>bookid;
r=StudentDB.equal(Studentid);//按编号查找
if (NULL==r)
{
cout <<" 不存在该读者，不能借书"<< endl;
break;
}

b=BookDB.equal(bookid);

if (b==NULL)

{

cout <<" 不存在该图书，不能借书"<< endl;

break;
}
if (b->borrowbook()==0)
{

cout << " 该图书已借出，不能借书"<< endl;

break;
}

r->borrowbook(b->getnumber());system("cls");

break;

case '2':
system("cls");

cout<<"还书\n 读者编号:";

cin >>Studentid;

cout << " 图书编号:";

cin >>bookid;

r=StudentDB.equal(Studentid);

if (r==NULL)
{
cout <<" 不存在该读者，不能还书" << endl;
break;
}

b=BookDB.equal(bookid);

if (b==NULL)

{
cout <<" 不存在该图书，不能还书" <<endl;
break;
}
b->retbook();

r->retbook(b->getnumber());
break;

case '3':
system("cls");

BookDB.bookdata();

break;

case '4':
system("cls");
StudentDB.Studentdata();
break;

default:cout<<"退出\n";

}
}
}