Library management system (Shandong Agricultural University Curriculum Design)

Code as shown ：

#include <iostream>
#include <string>
#include <cstring>
#include <fstream>
#include <cstdlib>
#include <windows.h>
const int INC=20;
using namespace std;
class Date{
public:
    int day;
    int month;
    int year;
    Date(int d=1,int m=1,int y=2012){
        // Judge the validity of the date 
        if(d>0&&d<32)day=d;else day=1;
        if(m>0&&m<13)month=m;else m=1;
        if(y>0)year=y;else year=2012;
    }
	void setDay(int d){day=d;}
	void setMonth(int m){month=m;}
	void setYear(int y){year=y;}
	int getDay(){return day;}
	int getMonth(){return month;}
	int getYear(){return year;}
	void disp(){cout<<year<<"/"<<month<<"/"<<day;}
	Date operator+(int dtmp);
	bool isLeapYear(int yy);
};
bool Date::isLeapYear(int yy){
	if(yy%400==0)
		return true;
	else if(yy%100!=0&&yy%4==0)
		return true;
	else return false;
}

Date Date::operator+(int dtmp){
	//bool Date::isLeapYear(int yy);
	int yy=year,mm=month,dd=day,mtmp,m2;
	bool flag;
	while(dtmp>=0){
		if(isLeapYear(yy)){
			dtmp-=366;
			flag=true;
		}
		else {
			dtmp-=365;
			flag=false;
		}
		yy++;
	}
	if(flag)
		dtmp+=366;
	else dtmp+=365;
	yy--;
	if(isLeapYear(yy)){
		m2=29;
	}
	else {
		m2=28;
	}
	mtmp=dtmp+dd;
	int m_day[]={0,31,m2,31,30,31,30,31,31,30,31,30,31};
	for(;mtmp>m_day[mm];){
		mtmp-=m_day[mm];
		if(mm==12){
			mm=0;
			yy++;
		}
		mm++;
	}
	dd=mtmp;
	Date dt(yy,mm,dd);
	return dt;
}
class Book{
// Book number 、 Title 、 author 、 Press. 、 Publication date 、 Publishing pricing 、 Number of Libraries 
private:
	string num;
	string title;
	string author;
	string publisher;
	Date publishdate;
	float price;
	int howmany;
	public:
    Book(string num0="24416-5",string title0=" data structure ",string author0=" Wang Hongmei , Hu Ming , Wang Tao ",
         string pub0=" tsinghua university press ",int bd=1,int bm=1,int by=2012,float pr=29.0,int ct=10):publishdate((bd,bm,by)){
    num=num0;title=title0;author=author0;publisher=pub0;price=pr;howmany=ct;}
    void setNum(string num0){num=num0;}
    void setTitle(string title0){title=title0;}
    void setAuthor(string author0){author=author0;}
    void setPublisher(string publisher0){publisher=publisher0;}
    void setPublishdate(int bd,int bm,int by){Date d(bd,bm,by);publishdate=d;}
    void setHowmany(int ct){howmany=ct;}
    void setPrice(float pr){price=pr;}
    string getNum(){return num;}
    string getTitle(){return title;}
    string getAuthor(){return author;}
    string getPublisher(){return publisher;}
    Date getPublishdate(){return publishdate;}
    int getHowmany(){return howmany;}
    float getPrice(){return price;}
    void dispABook(){
        cout <<num<< '\t'<<title<< '\t'<<author<< '\t'<<publisher<< '\t';
        getPublishdate().disp();
        cout<< '\t'<<price<< '\t'<<howmany << '\n' ;
        }
    friend class InBook;
    friend class ReaderBorrowBook;
};
class Reader{
// Student number 、 full name 、 college 、 Professional class 
private:
	string num;
	string name;
	string college;
	string classno;
public:
    Reader(string num0="20150000",string name0="NoName",string college0=" School of information ",string clsn=" Network engineering 15-1"){
    num=num0;name=name0;college=college0; classno=clsn;}
    void setNum(string num0){num=num0;}
    void setName(string name0){name=name0;}
    void setCollege(string college0){college=college0;}
    void setClassno(string clsn){classno=clsn;}
    string getNum(){return num;}
    string getName(){return name;}
    string getCollege(){return college;}
    string getClassno(){return classno;}
    void dispAReader(){
        cout <<num<< "\t"<<name<< "\t"<<college<< "\t"<<classno<< "\n";
    }
    friend class Inreader;
    friend class ReaderBorrowBook;
};

class BorrowBook{
// Student number 、 full name 、 Book number 、 Title 、 Borrowing date 、 Due date 、 Return date 
private:
	string num;
	string name;
	string college;
	string booknum;
	string title;
	Date borrowdate;
	Date toreturndate;
    Date returndate;
	BorrowBook(string num0="20150000",string name0="NoName",string college0=" School of information ",string booknum0="24416-5",
            string title0=" data structure ",int bd=1,int bm=1,int by=2012,int td=1,int tm=5,int ty=2012,int rd=1,int rm=3,int ry=2012)
			:borrowdate(bd,bm,by),toreturndate(td,tm,ty),returndate(rd,rm,ry){
                num=num0;name=name0;college=college0; booknum=booknum0;title=title0;
	}
    void setNum(string num0){num=num0;}
    void setName(string name0){name=name0;}
    void setBookNum(string num0){booknum=num0;}
    void setTitle(string title0){title=title0;}
    void setBorrowdate(int bd,int bm,int by){Date d(bd,bm,by);borrowdate=d;}
    void setToreturndate(int td,int tm,int ty){Date d(td,tm,ty);toreturndate=d;}
    void setReturndate(int rd,int rm,int ry){Date d(rd,rm,ry);returndate=d;}
    string getNum(){return num;}
    string getName(){return name;}
    string getBookNum(){return booknum;}
    string getTitle(){return title;}
    Date getBorrowdate(){return borrowdate;}
    Date getReturndate(){return returndate;}
    Date getToreturndate(){return toreturndate;}
    void dispBorrowBook(){
        cout <<num<< "\t"<<name<< "\t"<< "\t"<<booknum<< "\t"<<title<< "\t";
        borrowdate.disp();cout<<"\t";
        toreturndate.disp();cout<<"\t";
        returndate.disp();cout<< "\n";
    }
    friend class InBorrowBook;
    friend class ReaderBorrowBook;

};
void string2date(string pdates,int d[]){
        int k=0,by,bm,bd;
        while((pdates[k]<'0'||pdates[k]>'9')&&k<pdates.length())k++;
        by=0;
        for(;pdates[k]!='/'&&k<pdates.length();k++)
            by=by*10+pdates[k]-'0';
        k++;bm=0;
        for(;pdates[k]!='/'&&k<pdates.length();k++)
            bm=bm*10+pdates[k]-'0';
        if(pdates[k]=='/'){
          k++;bd=0;
          for(;k<pdates.length();k++)
            bd=bd*10+pdates[k]-'0';
            }
        else bd=1;
        d[0]=by;d[1]=bm;d[2]=bd;
    }
class InBook{
    public:
    Book *book;int bookcount;
void write2Bookfile(){
    string num,title,author,publisher,pdates;
    Date pdate;
    int i,bd,bm,by,ct;
    float price;
    ofstream outf( "book.txt", ios::out ) ;
    // The file name written should be the same as the file name read ; When debugging, you can take different file names , To avoid overwriting the original file 
    if ( !outf )
      { cerr << "File could not be open." << endl ;  }
    outf<<" Book information \n";
    for(int i=0;i<bookcount;i++)
    {
        Date pd=book[i].getPublishdate();
        outf<<book[i].getNum()<< '\t'<<book[i].getTitle()<< '\t';
        outf<<book[i].getAuthor()<< '\t'<<book[i].getPublisher()<< '\t';
        outf<<pd.getYear()<<"/"<<pd.getMonth()<<"/"<<pd.getDay();
        outf<< '\t'<<book[i].getPrice()<< '\t'<<book[i].getHowmany()<< '\n' ;
      }
    outf.close() ;
    }
int inbookFile( char * fileName, int delLine)
{
    string num,title,author,publisher,pdates;
    Date pdate;
    int i,bd,bm,by,ct;
    float price;
    ifstream inf( fileName, ios::in ) ;
    if ( !inf )
      { cerr << "File could not be open." << endl ; return 1;   }
  char s[80];
  for ( i=1; i <= delLine; i++ )
      inf.getline( s, 80 ) ;
  i=0;
  while( !inf.eof() )  //{ inf.getline( s, 80 ) ;    cout << s << endl ;  }
  {
      inf.getline( s, 80,'\t' ) ;//num=s;
      inf.getline( s, 80,'\t' ) ;title=s;
      inf.getline( s, 80,'\t' ) ;//author=s;
      inf.getline( s, 80,'\t' ) ;//publisher=s;
      inf.getline( s, 80,'\t' ) ;//pdates=s;
      inf>>price>>ct;
      if(title.length()>0)        i++;
      }
      bookcount=i;
      cout<<bookcount<<endl;
    inf.clear();
    inf.seekg(0,ios::beg);
    for ( i=1; i <= delLine; i++ )
      inf.getline( s, 80 ) ;
    book=new Book[bookcount+INC];
    for ( i=0; i <bookcount; i++ )
      {
      inf.getline( s, 80,'\t' ) ;num=s;
      inf.getline( s, 80,'\t' ) ;title=s;
      inf.getline( s, 80,'\t' ) ;author=s;
      inf.getline( s, 80,'\t' ) ;publisher=s;
      inf.getline( s, 80,'\t' ) ;pdates=s;
      inf>>price>>ct;//inf.getchar();
      if(title.length()>0){
        int d[3];
        if(num[0]==10)num=num.substr(1);
        string2date(pdates,d);
        by=d[0];bm=d[1];bd=d[2];
        book[i]=Book();
        book[i].setNum(num);
        book[i].setTitle(title);
        book[i].setAuthor(author);
        book[i].setPublisher(publisher);
        book[i].setPrice(price);
        book[i].setHowmany(ct);
        book[i].setPublishdate(bd,bm,by);
        }
      }
  inf.close() ;
  return bookcount;
  }
  friend class ReaderBorrowBook;
  int addbook(string num,string title,string author,string publisher,int bd,int bm,int by,float price,int ct){
        int i=bookcount;
        book[i]=Book();
        book[i].setNum(num);
        book[i].setTitle(title);
        book[i].setAuthor(author);
        book[i].setPublisher(publisher);
        book[i].setPrice(price);
        book[i].setHowmany(ct);
        book[i].setPublishdate(bd,bm,by);
        ++bookcount;
        return bookcount;
      }
    void searchbookbytitle(string title){
        bool found=false;
        for(int i=0;i<bookcount;i++)
        if((book[i].getTitle()).find(title)!= string::npos) {
            //cout<<book[i].getTitle()<< book[i].getTitle().find(title)<<endl;
            cout<<i<<"\t";
            book[i].dispABook();
            found=true;
            //return i;
            }
            if(!found)cout<<"book title:"<<title<<" not found."<<endl;
            //return -1;
        }
    int searchbookbytitlep(string title){
        for(int i=0;i<bookcount;i++)
        if(book[i].getTitle()==title) {
            //cout<<book[i].getTitle()<< book[i].getTitle().find(title)<<endl;
            cout<<i<<"\t";
            book[i].dispABook();
            return i;
            }
            cout<<"book title:"<<title<<" not found."<<endl;
            return -1;
        }
    void searchbookbyauthor(string author){
        bool found=false;
        for(int i=0;i<bookcount;i++)
        if((book[i].getAuthor()).find(author)!= string::npos) {
            //cout<<book[i].getTitle()<< book[i].getTitle().find(title)<<endl;
            cout<<i<<"\t";
            book[i].dispABook();
            found=true;
            //return i;
            }
            if(!found)cout<<"book author:"<<author<<" not found."<<endl;
            //return -1;
        }
    int searchbookbyauthorp(string author){
        for(int i=0;i<bookcount;i++)
        if(book[i].getAuthor()==author) {
            //cout<<book[i].getTitle()<< book[i].getTitle().find(title)<<endl;
            cout<<i<<"\t";
            book[i].dispABook();
            return i;
            }
            cout<<"book author:"<<author<<" not found."<<endl;
            return -1;
        }
    void searchbookbypub(string pub){
        bool found=false;
        for(int i=0;i<bookcount;i++)
        if((book[i].getPublisher()).find(pub)!= string::npos) {
            //cout<<book[i].getTitle()<< book[i].getTitle().find(title)<<endl;
            cout<<i<<"\t";
            book[i].dispABook();
            found=true;
            //return i;
            }
        if(!found)cout<<"book publisher:"<<pub<<" not found."<<endl;
            //return -1;
        }
    int searchbookbypubp(string pub){
        for(int i=0;i<bookcount;i++)
        if(book[i].getPublisher()==pub) {
            //cout<<book[i].getTitle()<< book[i].getTitle().find(title)<<endl;
            cout<<i<<"\t";
            book[i].dispABook();
            return i;
            }
            return -1;
        }
    void searchbookbynum(string num){// Fuzzy Lookup contains num String of 
        bool found=false;
        for(int i=0;i<bookcount;i++)
        if((book[i].getNum()).find(num)!= string::npos) {
            //cout<<book[i].getTitle()<< book[i].getTitle().find(title)<<endl;
            cout<<i<<"\t";
            book[i].dispABook();
            found=true;
   //         return i;
            }
        if(!found)cout<<"book num:"<<num<<" not found."<<endl;
   //         return -1;
        }
    int searchbookbynump(string num){// Exact search equals num String of 
        for(int i=0;i<bookcount;i++)
        if((book[i].getNum())==num) {
            //cout<<book[i].getTitle()<< book[i].getTitle().find(title)<<endl;
            cout<<i<<"\t";
            book[i].dispABook();
            return i;
            }
            return -1;
        }
    void sortbookbynum(){
        for(int i=0;i<bookcount;i++){
            int k=i;
            for(int j=i+1;j<bookcount;j++)
                if(book[j].getNum()<book[k].getNum()) k=j;
            //cout<<k<<" k&i "<<i<<" :"<<book[i].getNum()<<"---"<<book[k].getNum()<<endl;
            if(k!=i){
                Book t=book[i];book[i]=book[k];book[k]=t;
                }
            }
        }
    void sortbookbytitle(){
        for(int i=0;i<bookcount;i++){
            int k=i;
            for(int j=i+1;j<bookcount;j++)
                if(book[j].getTitle()<book[k].getTitle()) k=j;
            if(k!=i){
                Book t=book[i];book[i]=book[k];book[k]=t;
                }
            }
        }
    void changebookbynum(string oldnum,string newnum){
        int k=searchbookbynump(oldnum);
        if(k>=0)    {
            book[k].setNum(newnum);
            cout<<"changebookbynum successed:"<<endl;
            book[k].dispABook();
        }
        else cout<<"changebook failed. No book of num="<<oldnum<<endl;
        }
    void deletebookbynum(string num){
        int k=searchbookbynump(num);
        if(k>=0)    {
            cout<<"Book to be deleted :"<<endl;
            book[k].dispABook();
            book[k]=book[bookcount-1];
            cout<<"deletebookbynum successed:"<<endl;
            bookcount--;
            //return bookcount;
        }
        else cout<<"deletebook  failed. No book of num="<<num<<endl;
        }

    void changebookbytitle(string oldtitle,string newtitle){
        int k=searchbookbytitlep(oldtitle);
        if(k>=0)    {
            book[k].setTitle(newtitle);
            cout<<"changebookbytitle successed:"<<endl;
            book[k].dispABook();
        }
        else cout<<"changebook failed. No book of title="<<oldtitle<<endl;
        }

    void deletebookbytitle(string title){
        int k=searchbookbytitlep(title);
        if(k>=0)    {
            cout<<"Book to be deleted :"<<endl;
            book[k].dispABook();
            book[k]=book[bookcount-1];
            cout<<"deletebookbytitle successed:"<<endl;
            bookcount--;
            //return bookcount;
        }
        else cout<<"deletebook  failed. No book of title="<<title<<endl;

        }
};
class InReader{
    public:
    Reader *reader;int readercount;
    string a[100];
    void write2Readerfile(){

        }
int inreaderFile( char * fileName, int delLine)
{
    string num,name,college,classno;
    int i;
    ifstream inf( fileName, ios::in ) ;
  if ( !inf )
      { cerr << "File could not be open." << endl ; return 1;   }
  char s[80];
  for ( i=1; i <= delLine; i++ )
      inf.getline( s, 80 ) ;
  i=0;
  while( !inf.eof() )//  { inf.getline( s, 80 ) ;    cout << s << endl ;  }
  {
      inf.getline( s, 80,'\t' ) ;//num=s;
      inf.getline( s, 80,'\t' ) ;name=s;
      inf.getline( s, 80,'\t' ) ;//college=s;
      inf.getline( s, 80 ) ;//classno=s;
      if(name.length()>0)        i++;
      }
  readercount=i;
  cout<<readercount<<endl;
    inf.clear();
    inf.seekg(0,ios::beg);
    for ( i=1; i <= delLine; i++ )
      inf.getline( s, 80 ) ;
    reader=new Reader[readercount+INC];
    for ( i=0; i <readercount; i++ )
      {
      inf.getline( s, 80,'\t' ) ;num=s;
      inf.getline( s, 80,'\t' ) ;name=s;
      inf.getline( s, 80,'\t' ) ;college=s;
      inf.getline( s, 80 ) ;classno=s;
      if(name.length()>0){
          if(num[0]==10)num=num.substr(1);
        reader[i]=Reader();
        reader[i].setNum(num);
        reader[i].setName(name);
        reader[i].setCollege(college);
        reader[i].setClassno(classno);
        }
      }
  inf.close() ;
  return readercount;

  }
    int addreader(string num,string name,string college,string classno){
        int i=readercount;
        reader[i]=Reader();
        reader[i].setNum(num);
        reader[i].setName(name);
        reader[i].setCollege(college);
        reader[i].setClassno(classno);

        ++readercount;
        return readercount;
      }
      // Query reader information through student number 
   void searchreaderbynum(string num){
        bool found=false;
        for(int i=0;i<readercount;i++)
        if((reader[i].getNum()).find(num)!= string::npos) {
            cout<<i<<"\t";
            reader[i].dispAReader();
            found=true;
            //return i;
            }
        if(!found)cout<<"reader of num: "<<num<<" not found"<<endl;
            //return -1;
        }
   int searchreaderbynump(string num){
        for(int i=0;i<readercount;i++)
        if(reader[i].getNum()==num) {
            cout<<i<<"\t";
            reader[i].dispAReader();
            return i;
            }
            return -1;
        }
        // Query reader information by name 
    void searchreaderbyname(string name){
        bool found=false;
        for(int i=0;i<readercount;i++)
        if((reader[i].getName()).find(name)!= string::npos) {
            //cout<<reader[i].getName()<< reader[i].getName().find(name)<<endl;
            cout<<i<<"\t";
            reader[i].dispAReader();
            found=true;
            //return i;
            }
            if(!found)cout<<"reader name:"<<name<<" not found."<<endl;
            //return -1;
        }
    int searchreaderbynamep(string name){
        for(int i=0;i<readercount;i++)
        if(reader[i].getName()==name) {
            //cout<<reader[i].getName()<< reader[i].getName().find(Name)<<endl;
            cout<<i<<"\t";
            reader[i].dispAReader();
            return i;
            }
            cout<<"reader name:"<<name<<" not found."<<endl;
            return -1;
        }
        // Query reader information through professional classes 
    void searchreaderbyclassno(string classno){
        bool found=false;
        for(int i=0;i<readercount;i++)
        if((reader[i].getClassno()).find(classno)!= string::npos) {
            cout<<i<<"\t";
            reader[i].dispAReader();
            found=true;
            //return i;
            }
        if(!found)cout<<"reader of classno: "<<classno<<" not found"<<endl;
            //return -1;
        }
   int searchreaderbyclassnop(string classno){
        for(int i=0;i<readercount;i++)
        if(reader[i].getClassno()==classno) {
            cout<<i<<"\t";
            reader[i].dispAReader();
            return i;
            }
            return -1;
        }

        // Sort reader information in ascending order by student number 
    void sortreaderbynum(){
        for(int i=0;i<readercount;i++){
            int k=i;
            for(int j=i+1;j<readercount;j++)
                if(reader[j].getNum()<reader[k].getNum()) k=j;
            //cout<<k<<" k&i "<<i<<" :"<<reader[i].getNum()<<"---"<<reader[k].getNum()<<endl;
            if(k!=i){
                Reader t=reader[i];reader[i]=reader[k];reader[k]=t;
                }
            }
        }
        // Sort reader information in ascending order by College 
    void sortreaderbycollege(){
        for(int i=0;i<readercount;i++){
            int k=i;
            for(int j=i+1;j<readercount;j++)
                if(reader[j].getCollege()<reader[k].getCollege()) k=j;
            if(k!=i){
                Reader t=reader[i];reader[i]=reader[k];reader[k]=t;
                }
            }
        }
               // By student number + Name changes reader information 
    void changereaderbynumname(string oldnum,string oldname,string newnum,string newname){
        int k=searchreaderbynump(oldnum);
        int j=searchreaderbynamep(oldname);
        if(k>=0&&j>=0)    {
            reader[k].setNum(newnum);
            reader[j].setName(newname);
            cout<<"changereaderbynum+name successed:"<<endl;
            reader[k].dispAReader();
        }
        else cout<<"changereader failed. No reader of num+name="<<oldnum<<" "<<oldname<<endl;
        }
        // By student number + Name delete reader information 
    void deletereaderbynumname(string num,string name){
        int k=searchreaderbynump(num);
        int j=searchreaderbynamep(name);
        if(k>=0&&j>=0)    {
            cout<<"Reader to be deleted :"<<endl;
            reader[j].dispAReader();
            reader[j]=reader[readercount-1];
            cout<<"deletereaderbynumname successed:"<<endl;
            readercount--;
            //return readercount;
        }
    }
  friend class ReaderBorrowBook;
};
class InBorrowBook{
    public:
    BorrowBook *borrowbook;int borrowbookcount;
    void write2BorrowBookfile(){

        }
int inborrowbookFile( char * fileName, int delLine)
{
    string num,name,college,booknum,title;
    string borrowdates;
	string toreturndates;
    string returndates;
    int i;
    ifstream inf( fileName, ios::in ) ;
  if ( !inf )
      { cerr << "File could not be open." << endl ; return 1;   }
  char s[80];
  for ( i=1; i <= delLine; i++ )
      inf.getline( s, 80 ) ;
  i=0;
  while( !inf.eof() )
  {
      inf.getline( s, 80,'\t') ;
      inf.getline( s, 80,'\t' ) ;
      inf.getline( s, 80,'\t' ) ;
      inf.getline( s, 80 ) ;
      if(strlen(s)>1)        i++;
      }
  borrowbookcount=i;
  cout<<borrowbookcount<<endl;
    inf.clear();
    inf.seekg(0,ios::beg);
    for ( i=1; i <= delLine; i++ )
      inf.getline( s, 80 ) ;
    borrowbook=new BorrowBook[borrowbookcount+INC];
    for ( i=0; i <borrowbookcount; i++ )
      {
      inf.getline( s, 80,'\t' ) ;num=s;
      inf.getline( s, 80,'\t' ) ;name=s;
      inf.getline( s, 80,'\t' ) ;booknum=s;
      inf.getline( s, 80,'\t' ) ;title=s;
      inf.getline( s, 80,'\t' ) ;borrowdates=s;
      inf.getline( s, 80,'\t' ) ;toreturndates=s;
      inf.getline( s, 80,'\n' ) ;returndates=s;
      if(name.length()>0){
          if(num[0]==10)num=num.substr(1);
        borrowbook[i]=BorrowBook();
        int d[3];
        string2date(borrowdates,d);
        int by=d[0],bm=d[1],bd=d[2];
        borrowbook[i].setBorrowdate(bd,bm,by);
        string2date(toreturndates,d);
        by=d[0];bm=d[1];bd=d[2];
        borrowbook[i].setToreturndate(bd,bm,by);
        string2date(returndates,d);
        by=d[0];bm=d[1];bd=d[2];
        borrowbook[i].setReturndate(bd,bm,by);
        borrowbook[i].setNum(num);
        borrowbook[i].setName(name);
        borrowbook[i].setBookNum(booknum);
        borrowbook[i].setTitle(title);
        }
      }
  inf.close() ;

  return borrowbookcount;
  }
  friend class ReaderBorrowBook;
  int searchbyreaderbook(string readernum,string booknum){
        for(int i=0;i<borrowbookcount;i++)
        if((borrowbook[i].getNum())==readernum&&(borrowbook[i].getBookNum())==booknum) {
            cout<<i<<"\t";
            borrowbook[i].dispBorrowBook();
            return i;
            }
            return -1;

      }
      // Carry out book borrowing inquiry through student number 
    void searchbynum(string num){
        bool found=false;
        for(int i=0;i<borrowbookcount;i++)
        if((borrowbook[i].getNum()).find(num)!= string::npos) {
            //cout<<borrowbook[i].getNum()<< borrowbook[i].getNum().find(num)<<endl;
            cout<<i<<"\t";
            borrowbook[i].dispBorrowBook();
            found=true;
            //return i;
            }
            if(!found)cout<<"borrowbook num:"<<num<<" not found."<<endl;
            //return -1;
        }
    int searchbynump(string num){
        for(int i=0;i<borrowbookcount;i++)
        if(borrowbook[i].getNum()==num) {
            //cout<<borrowbook[i].getNum()<< borrowbook[i].getNum().find(num)<<endl;
            cout<<i<<"\t";
            borrowbook[i].dispBorrowBook();
            return i;
            }
            //cout<<"borrowbook num:"<<num<<" not found."<<endl;
            //return -1;
        }
         // Carry out book borrowing query through book title 
    void searchbytitle(string title){
        bool found=false;
        for(int i=0;i<borrowbookcount;i++)
        if((borrowbook[i].getTitle()).find(title)!= string::npos) {
            //cout<<borrowbook[i].getTitle()<< borrowbook[i].getTitle().find(title)<<endl;
            cout<<i<<"\t";
            borrowbook[i].dispBorrowBook();
            found=true;
            //return i;
            }
            if(!found)cout<<"borrowbook title:"<<title<<" not found."<<endl;
            //return -1;
        }
    int searchbytitlep(string title){
        for(int i=0;i<borrowbookcount;i++)
        if(borrowbook[i].getTitle()==title) {
            //cout<<borrowbook[i].getTitle()<< borrowbook[i].getTitle().find(title)<<endl;
            cout<<i<<"\t";
            borrowbook[i].dispBorrowBook();
            return i;
            }
            cout<<"borrowbook title:"<<title<<" not found."<<endl;
            return -1;
        }
        // Carry out book borrowing and inquiry through the College 
    void searchbycollege(string college){
        int i,k;
        InReader b;
        b.inreaderFile("reader.txt",1);
        int j=0;
        for(i=0;i<b.readercount;i++){
        if((b.reader[i].getCollege()).find(college)!= string::npos) {
            b.a[j]=b.reader[i].getNum();
            j++;
            }
        }
         if(j==0)
            cout<<" The college students have no record of borrowing books "<<endl;
        for(int k=0;k<j;k++)
        searchbynum(b.a[k]);

    }
    int searchbycollegep(string college){
         int i,k;
        InReader b;
        int j=0;
        bool found=false;
        for(i=0;i<b.readercount;i++){
        if((b.reader[i].getCollege()).find(college)!= string::npos) {
            cout<<i<<"\t";
            b.a[j]=b.reader[i].getNum();
            j++;
            found=true;
        }
        if(!found)cout<<"reader of college: "<<college<<" not found"<<endl;
            //return -1;
        }
    }

};
class ReaderBorrowBook{

    InBook bk;
    InReader rd;
    InBorrowBook bb;
    public:
    void write2file(){
        bk.write2Bookfile();
        rd.write2Readerfile();
        bb.write2BorrowBookfile();

        }
    void init(){
        bk.inbookFile( "book.txt", 1);
        rd.inreaderFile( "reader.txt", 1);
        bb.inborrowbookFile( "borrowbook.txt", 1);
        }
    void dispBook(){
        for ( int i=0; i <bk.bookcount; i++ )
            {cout <<i<<":";
            bk.book[i].dispABook();}
        }
    void dispReader(){
        for ( int i=0; i <rd.readercount; i++ )
            {cout <<i<<":";rd.reader[i].dispAReader();}
        }
    void dispBorrowbook(){
        for ( int i=0; i <bb.borrowbookcount; i++ )
            {cout <<i<<":";bb.borrowbook[i].dispBorrowBook();}
          }
    void dispCount(){
        cout<<bk.bookcount<<endl;cout<<rd.readercount<<endl;cout<<bb.borrowbookcount<<endl;
        }
    void addbook(){
        string num,title,author,publisher;
        char num0[80],tit[80],auth[80],pub[80];
        int pd,pm,py,howmany;
        float price;
        Date publishdate;
        cout<<" Book number 、 Title 、 author 、 Press. 、 Publication date (yyyy mm dd)、 pricing 、 Number of Libraries "<<endl;

        string num1="24416-5",title0=" data structure ",author0=" Wang Hongmei , Hu Ming , Wang Tao ",pub0=" tsinghua university press ";
        int pd0=1,pm0=1,py0=2012;
        float price0=29.0;
        int howmany0=10;
        //bookcount=
        bk.addbook(num1,title0,author0,pub0,pd0,pm0,py0,price0,howmany0);
        int i=bk.bookcount-1;
        cout <<i<<":";
        bk.book[i].dispABook();
        }
    void addreader(){
        string num,name,college,classno;
        char num0[80],nam[80],coll[80],clas[80];
        cout<<" Student number \t full name \t college \t Professional class :"<<endl;

        string num1="20151000",name0=" Wang Tao ",college0="computer",class0="network class 1";
        rd.addreader(num1,name0,college0,class0);

        int i=rd.readercount-1;
        cout <<i<<":";
        rd.reader[i].dispAReader();
        }
    void searchbook(){
        cout<<"2． Book information inquiry ： According to the book title ,  By author's name ,  Query by publishing house ."<<endl;
        char tit[80];
        string title=" data structure ",author=" Hu Ming ",pub=" The machinery industry ";
        int i,j,k,select;
        while(1){
            cout<<" Book information inquiry ："<<endl;
            cout<<"1． Search by title "<<endl;
            cout<<"2． Search by author name "<<endl;
            cout<<"3． Query by publishing house "<<endl;
            cout<<"0. return"<<endl;
            cin>>select;
            cin.get();
            switch(select){
                case 1:
                    cout<<" Title :";
                    getline(cin,title,'\n');
                    bk.searchbookbytitle(title);
                    break;
                case 2:
                    cout<<" The author's name :";
                    getline(cin,author,'\n');
                    bk.searchbookbyauthor(author);
                    break;
                case 3:
                    cout<<" Press. :";
                    getline(cin,pub,'\n');
                    bk.searchbookbypub(pub);break;
                case 0:return;
            }
        }
        }
    void sortbook(){
        int select;
        cout<<"3． Book information sorting ： By book number 、 Book titles are sorted in ascending order ."<<endl;
        cout<<" Book information sorting ："<<endl;
        cout<<"1． Sort by book number "<<endl;
        cout<<"2． Sort by title "<<endl;
        cout<<"0. return"<<endl;
        cin>>select;
        switch(select){
            case 1:
                    cout<<" Book number :";
                    bk.sortbookbynum();
                    dispBook();
                    break;
            case 2:
                    cout<<" Title :";
                    bk.sortbookbytitle();
                    dispBook();
                    break;
            case 0:return;
            }
        }
    void editbook(){
        string oldtitle="VisualBasic  Programming tutorial ",newtitle="VisualBasic  Programming tutorial -C",oldnum="40667",newnum="40667-C";
        int select;
        cout<<"4． Modification of book information 、 Delete ： Modify and delete books by book number or title ."<<endl;
        while(1){
        cout<<" Modification of book information 、 Delete ："<<endl;
        cout<<"1． Modify according to the book number "<<endl;
        cout<<"2． Delete by book number "<<endl;
        cout<<"3． Revise according to the title "<<endl;
        cout<<"4． Delete by title "<<endl;
        cout<<"0. return"<<endl;
        cin>>select;
        cin.get();
        switch(select){
            case 1:
                    cout<<"old Book number :";
                    getline(cin,oldnum,'\n');
                    cout<<"new Book number :";
                    getline(cin,newnum,'\n');
                    cout<<"changebookbynum: "<<oldnum<<" to "<<newnum<<endl;
                    bk.changebookbynum(oldnum,newnum);
                    //dispBook();
                    break;
            case 2:
                    cout<<"delete Book number :";
                    getline(cin,oldnum,'\n');
                    cout<<"delete Book number :"<<oldnum<<endl;
                    bk.deletebookbynum(oldnum);
                    //dispBook();
                    break;
            case 3:
                    cout<<"old Title :";
                    getline(cin,oldtitle,'\n');
                    cout<<"new Title :";
                    getline(cin,newtitle,'\n');
                    cout<<"changebookbytitle: "<<oldtitle<<" to "<<newtitle<<endl;
                    bk.changebookbytitle(oldtitle,newtitle);
                    //dispBook();
                    break;
            case 4:
                    cout<<"delete Title :";
                    getline(cin,oldtitle,'\n');
                    cout<<"deletebookbytitle: "<<oldtitle<<endl;
                    bk.deletebookbytitle(oldtitle);
                    //dispBook();
                    break;
            case 0:return;
            }
        }
    }
     void searchreader(){
        cout<<"6． Reader information query ： By student number 、 full name 、 Professional classes, etc ."<<endl;
        char tit[80];
        string num="20150000",name="NoName",classno=" Network engineering 15-1";
        int i,j,k,select;
        while(1){
            cout<<" Reader information query ："<<endl;
            cout<<"1． By student number "<<endl;
            cout<<"2． Search by name "<<endl;
            cout<<"3． Query by professional class "<<endl;
            cout<<"0. return"<<endl;
            cin>>select;
            cin.get();
            switch(select){
                case 1:
                    cout<<" Student number :";
                    getline(cin,num,'\n');
                    rd.searchreaderbynum(num);
                    break;
                case 2:
                    cout<<" full name :";
                    getline(cin,name,'\n');
                    rd.searchreaderbyname(name);
                    break;
                case 3:
                    cout<<" Professional class :";
                    getline(cin,classno,'\n');
                    rd.searchreaderbyclassno(classno);break;
                case 0:return;
            }
        }
        }
    void sortreader(){
        int select;
        cout<<"7． Reader information sorting ： According to the student id 、 Colleges, etc. are sorted in ascending order ."<<endl;
        cout<<" Reader information sorting ："<<endl;
        cout<<"1． Sort by student number "<<endl;
        cout<<"2． Sort by College "<<endl;
        cout<<"0. return"<<endl;
        cin>>select;
        switch(select){
            case 1:
                    cout<<" Student number :";
                    rd.sortreaderbynum();
                    dispReader();
                    break;
            case 2:
                    cout<<" college :";
                    rd.sortreaderbycollege();
                    dispReader();
                    break;
            case 0:return;
            }
        }
    void editreader(){
        string oldnum="2015000000",newnum="20076954",oldname="Noname",newname=" Tang Wu ";
        int select;
        cout<<"8． Modification of reader information 、 Delete ： According to the student id + Name to modify and delete reader information ."<<endl;
        while(1){
        cout<<" Modification of reader information 、 Delete ："<<endl;
        cout<<"1． According to the student id + Name change "<<endl;
        cout<<"2． According to the student id + Name delete "<<endl;
        cout<<"0. return"<<endl;
        cin>>select;
        cin.get();
        switch(select){
            case 1:
                    cout<<"old Student number + full name :";
                    getline(cin,oldnum,'\n');
                    getline(cin,oldname,'\n');
                    cout<<"new Student number + full name :";
                    getline(cin,newnum,'\n');
                    getline(cin,newname,'\n');
                    cout<<"changereaderbynumname: "<<oldnum<<" "<<oldname<<" to "<<newnum<<" "<<newname<<endl;
                    rd.changereaderbynumname(oldnum,oldname,newnum,newname);
                    //dispReader();
                    break;
            case 2:
                    cout<<"delete Student number + full name :";
                    getline(cin,oldnum,'\n');
                    getline(cin,oldname,'\n');
                    cout<<"delete Student number + full name :"<<oldnum<<" "<<oldname<<endl;
                    rd.deletereaderbynumname(oldnum,oldname);
                    //dispReader();
                    break;
            case 0:return;
            }
        }
    }
    void readerborrowabook(){
        cout<<"9． Book borrowing ： Enter the student id + Book number , If the number of Libraries in the book information table of the book is greater than 0, You can lend ,"<<endl;
        string rdnum="20061709",booknum="33071",name,title;
        int select,rdpos,bookpos,y,m,d;
        while(1){
            cout<<" Book borrowing ："<<endl;
            cout<<"1． Borrow books "<<endl;
            cout<<"0．return"<<endl;
            cin>>select;
            cin.get();
            if(select==0)return;
            cout<<"borrow Student number :";
            getline(cin,rdnum,'\n');
            cout<<"borrow Book number :";
            getline(cin,booknum,'\n');
            bookpos=bk.searchbookbynump(booknum);
            rdpos=rd.searchreaderbynump(rdnum);
            if(bookpos>0&&rdpos>0){
                int hm=bk.book[bookpos].getHowmany();
                if(hm>0){
                    name=rd.reader[rdpos].getName();
                    title=bk.book[bookpos].getTitle();
                    bk.book[bookpos].setHowmany(hm-1); // Modify the number of Libraries in the book information table 
                    bb.borrowbook[bb.borrowbookcount].setNum(rdnum);
                    bb.borrowbook[bb.borrowbookcount].setBookNum(booknum);
                    bb.borrowbook[bb.borrowbookcount].setName(name);
                    bb.borrowbook[bb.borrowbookcount].setTitle(title);

                    SYSTEMTIME ct;
                    GetLocalTime(&ct);// Take the system time , If you use GetSystemTime(&ct); So what you get is Greenwich mean time 
                    y=ct.wYear;
                    m=ct.wMonth;
                    d=ct.wDay;
                    Date toret=Date(d,m,y)+60;
                    bb.borrowbook[bb.borrowbookcount].setBorrowdate(d,m,y);
                    bb.borrowbook[bb.borrowbookcount].setToreturndate(toret.getDay(),toret.getMonth(),toret.getYear());
                    bb.borrowbook[bb.borrowbookcount].setReturndate(1,1,1);
                    bb.borrowbookcount++;
                    }
                else cout<<booknum<<"  Number of Libraries =0"<<". can't be borrowed. "<<endl;
                }
            else{
                if(bookpos<0)cout<<"No book "<<booknum<<". can't borrow!"<<endl;
                if(rdpos<0)cout<<"No reader "<<rdnum<<". can't borrow!"<<endl;
            }
        }
    }
    void readerreturnabook(){
        cout<<"10． Book return ： Enter the student id + Title , Modify the number of Libraries in the book information table , Record the return date of the student in the book borrowing form ."<<endl;
        char tit[80];
        string rdnum="20061709",booknum="33071",name,title;
        int select,rdpos,bookpos,y,m,d;
        while(1){
           cout<<" Book return ："<<endl;
            cout<<"1． Return books "<<endl;
            cout<<"0．return"<<endl;
            cin>>select;
            cin.get();
            if(select==0)return;
            cout<<"borrow Student number :";
            getline(cin,rdnum,'\n');
            cout<<"borrow Book number :";
            getline(cin,booknum,'\n');
            booknum=tit;
            bookpos=bk.searchbookbynump(booknum);
            rdpos=rd.searchreaderbynump(rdnum);
            if(bookpos>0&&rdpos>0){
                    bk.book[bookpos].setHowmany(bk.book[bookpos].getHowmany()+1);
                    SYSTEMTIME ct;
                    GetLocalTime(&ct);// Take the system time 
                    y=ct.wYear;
                    m=ct.wMonth;
                    d=ct.wDay;
                    bb.borrowbook[bb.borrowbookcount].setReturndate(d,m,y);
                }
            else{
                if(bookpos<0)cout<<"No book "<<booknum<<". can't return!"<<endl;
                if(rdpos<0)cout<<"No reader "<<rdnum<<". can't return!"<<endl;
            }
        }
        }
    void searchreaderborrowbook(){
        cout<<"11． Book borrowing inquiry ： By student number 、 Title 、 Colleges and so on ."<<endl;
        char tit[80];
        string num="20150000",title=" data structure ",college=" School of information ";
        int i,j,k,select;
        while(1){
            cout<<" Book borrowing inquiry ："<<endl;
            cout<<"1． By student number "<<endl;
            cout<<"2． Search by title "<<endl;
            cout<<"3.  Query by College "<<endl;
            cout<<"0. return"<<endl;
            cin>>select;
            cin.get();
            switch(select){
                case 1:
                    cout<<" Student number :";
                    getline(cin,num,'\n');
                    bb.searchbynum(num);
                    break;
                case 2:
                    cout<<" Title :";
                    getline(cin,title,'\n');
                    bb.searchbytitle(title);
                    break;
                case 3:
                    cout<<" college :";
                    getline(cin,college,'\n');
                    bb.searchbycollege(college);
                    break;
                case 0:return;
            }
        }
        }
};
int main(){
    ReaderBorrowBook rbb;
    rbb.init();
    rbb.dispBook();
    rbb.dispReader();
    rbb.dispBorrowbook();
    rbb.dispCount();
    int select;
    while(1){
        cout<<" Menu selection function ："<<endl;
        cout<<"1． Book information adding function ： Including book number 、 Title 、 author 、 Publisher name 、 Number of Libraries 、 Pricing, etc "<<endl;
        cout<<"2． Book information inquiry ： According to the book title ,  By author's name ,  Query by publishing unit ."<<endl;
        cout<<"3． Book information sorting ： By book number 、 Book titles are sorted in ascending order ."<<endl;
        cout<<"4． Modification of book information 、 Delete ： Modify and delete books by book number or title ."<<endl;
        cout<<"5． Reader information adding function ： Including student ID 、 full name 、 college 、 Professional classes, etc ."<<endl;
       cout<<"6． Reader information query ： By student number 、 full name 、 Class, etc ."<<endl;
       cout<<"7． Reader information sorting ： According to the student id 、 Colleges, etc. are sorted in ascending order ."<<endl;
       cout<<"8． Modification of reader information 、 Delete ： According to the student id + Name to modify and delete reader information ."<<endl;
        cout<<"9． Book borrowing ： Enter the student id + Book number , If the number of Libraries in the book information table of the book is greater than 0, You can lend ,"<<endl;
        cout<<" Modify the library quantity in the book information table after lending the corresponding quantity , Add the student's borrowing in the book borrowing form ."<<endl;
        cout<<"10． Book return ： Enter the student id + Title , Modify the number of Libraries in the book information table , Record the return time of the student in the book borrowing form ."<<endl;
       cout<<"11． Book borrowing inquiry ： By student number 、 Title 、 Colleges and so on ."<<endl;
        cout<<"0.  exit"<<endl;
        cin>>select;
        switch(select){
            case 1:rbb.addbook();    rbb.dispCount();break;
            case 2:rbb.searchbook();break;
            case 3:rbb.sortbook();break;
            case 4:rbb.editbook();break;
            case 5:rbb.addreader();    rbb.dispCount();break;
            case 6:rbb.searchreader();break;
            case 7:rbb.sortreader();break;
            case 8:rbb.editreader();break;
            case 9:rbb.readerborrowabook();break;
            case 10:rbb.readerreturnabook();break;
            case 11:rbb.searchreaderborrowbook();break;
            case 0:rbb.write2file();exit(0);
            }
        }
    return 0;
}