如何使用C++编写实现图书管理系统

这篇文章将为大家详细讲解有关如何使用C++编写实现图书管理系统，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。

具体内容如下

为图书管理人员编写一个图书管理系统，图书管理系统的设计主要是实现对图书的管理和相关操作，包括3个表：
图书信息表——存储图书的基本信息，包括书号、书名、作者、出版社、出版日期、存馆数量、定价等。
读者信息表——存储读者的基本信息，包括学号、姓名、学院、专业班级等。
图书借阅表——存储读者借书的相关信息，包括学号、姓名、书号、书名、借阅日期、应还日期、归还日期等。

用菜单选择方式完成了以下功能：

图书信息添加功能：包括书号、书名、作者、出版社、出版日期、存馆数量、定价等。

图书信息查询：分别按书名, 按作者名,
按出版单位等进行查询。

图书信息排序：按书号、书名等按升序进行排序。

图书信息的修改、删除：按书号或书名进行图书的修改和删除。

读者信息添加功能：包括学号、姓名、学院、专业、班级等。

读者信息查询：分别按学号、姓名、班级等进行查询。

读者信息排序：按学号、学院等按升序进行排序。

读者信息的修改、删除：按学号+姓名进行读者信息的修改和删除

图书借阅：输入学号+书号，如果该书图书信息表中的存馆数量大于0，则可以借出，借出相应数量后修改图书信息表中的存馆数量，在图书借阅表添加该同学的借阅。

图书归还：输入学号+书号，修改图书信息表中的存馆数量，在图书借阅表中记录该同学的归还时间。

图书借阅查询：分别按学号、书名、学院等进行查询。

#include <iostream>#include <string>#include <cstring>#include <fstream>#include <cstdlib>#include <windows.h>#include <winbase.h>const int INC=20;using namespace std;class Date{   //Date类 ：日期类public:    int day;     //日    int month;   //月    int year;    //年    Date(int d=1,int m=1,int y=2012){    //构造函数  默认初始日期2012.1.1        //判断日期的合法性        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;}       //设置日    void setMonth(int m){month=m;}   //设置月    void setYear(int y){year=y;}     //年    int getDay(){return day;}         //获取年月日    int getMonth(){return month;}    int getYear(){return year;}    void disp(){cout<<year<<"/"<<month<<"/"<<day;}   //显示日期    Date operator+(int dtmp);    bool isLeapYear(int yy);              //判断是否为闰年};bool Date::isLeapYear(int yy){          //判断是否为闰年    if(yy%400==0)        return true;    else if(yy%100!=0&&yy%4==0)        return true;    else return false;}Date Date::operator+(int dtmp){         //重载+运算符    //bool Date::isLeapYear(int yy);    int yy=year,mm=month,dd=day,mtmp,m2;     //年份yy   月份mm   日dd    借阅天数 dtmp    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};   //每月天数    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;     //返回一个新日期}class Book{//书号、书名、作者、出版社、出版日期、出版定价、存馆数量private:    string num;   //s书号    string title;   //标题    string author;   //作者    string publisher;   //出版社    Date publishdate;   //Date类：出版日期    float price;   //价格    int howmany;    //存馆数量    public:    Book(string num0="24416-5",string title0="数据结构",string author0="王红梅,胡明,王涛",         string pub0="清华大学出版社",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;}      //设置书号    void setTitle(string title0){title=title0;}   //设置标题    void setAuthor(string author0){author=author0;}   //设置作者    void setPublisher(string publisher0){publisher=publisher0;}   //设置出版社    void setPublishdate(int bd,int bm,int by){Date d(bd,bm,by);publishdate=d;}    //设置出版日期，先构造在复制    void setHowmany(int ct){howmany=ct;}    //设置库存    void setPrice(float pr){price=pr;}   //设置价格    string getNum(){return num;}        // 获取 书号 标题 作者 等信息    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';       //获取Book信息  ：书号标题  作者 出版社  日期        getPublishdate().disp();    //获取日期信息        cout<< '\t'<<price<< '\t'<<howmany << '\n' ;        }    friend class InBook;               //友元类    friend class ReaderBorrowBook;};class Reader{//学号、姓名、学院、专业班级  读者类private:    string num;    //学号    string name;    //姓名    string college;   //专业    string classno;   //班级public:    Reader(string num0="20150000",string name0="NoName",string college0="信息学院",string clsn="网络工程15-1"){    num=num0;name=name0;college=college0; classno=clsn;}         //构造函数初始化信息    void setNum(string num0){num=num0;}            //功能函数 设置信息    void setName(string name0){name=name0;}    void setCollege(string college0){college=college0;}    void setClassno(string clsn){classno=clsn;}    string getNum(){return num;}   //功能函数   获取信息    string getName(){return name;}    string getCollege(){return college;}    string getClassno(){return classno;}    void dispAReader(){                    //显示信息        cout <<num<< "\t"<<name<< "\t"<<college<< "\t"<<classno<< "\n";    }    friend class Inreader;    friend class ReaderBorrowBook;};class BorrowBook{                   //借阅的书类private:    string num;                //学号、姓名、书号、书名、借阅日期、应还日期、归还日期    string name;    string booknum;    string title;    Date borrowdate;    Date toreturndate;    Date returndate;    BorrowBook(string num0="20150000",string name0="NoName",string booknum0="24416-5",            string title0="数据结构",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; booknum=booknum0;title=title0;  //初始化    }    void setNum(string num0){num=num0;}  //设置学号    void setName(string name0){name=name0;}//设置名字    void setBookNum(string num0){booknum=num0;}//设置书号    void setTitle(string title0){title=title0;}//书名    void setBorrowdate(int bd,int bm,int by){Date d(bd,bm,by);borrowdate=d;}//借阅日期    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;}//归还日期    string getNum(){return num;}   //获取学号    string getName(){return name;}//获取名字    string getBookNum(){return booknum;}//书号    string getTitle(){return title;}//书名    Date getBorrowdate(){return borrowdate;}//得到日期    Date getReturndate(){return returndate;}    Date getToreturndate(){return toreturndate;}    void dispBorrowBook()     //显示值    {        cout <<num<< "\t"<<name<< "\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;    //book[n],很多本书    int bookcount;     //记数    void write2Bookfile()    {    string num,title,author,publisher,pdates;    Date pdate;    int i,bd,bm,by,ct;           //多余变量吧    float price;    ofstream outf( "d:\\book.txt", ios::out ) ;    //写入的文件名应该与读出的文件名相同；调试时可以取不同的文件名，以免覆盖掉原文件    if ( !outf )      { cerr << "File could not be open." << endl ;  }    outf<<"图书信息\n";    for(int i=0;i<bookcount;i++)                 //写入图书信息    {        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() ;                 //关闭文件    }int inbookFile( char * fileName, int delLine)    //获取图书信息{cout<<1<<endl;    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)//添加图书信息  {        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)         //按照书名查找    {        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){    //精确查找        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)    //按照作者查找    {        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) //精确查找    {        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)    //按照出版社查找    {        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)    {//模糊查找包含num的串        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)    {//精确查找等于num的串        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()      //按照书号排序    {        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()     //按照标题排序    {        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)     //按书号改信息    {        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)     //按书号删除书目    {        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)    {      //按标题修改书目        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){        //按书名删除书        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;  //reader[n],读者总数    void write2Readerfile()     //写入读者信息    {        string a1,b1,c1,d1;        ofstream fout( "d:\\reader.txt", ios::out );        if ( !fout )      { cerr << "File could not be open." << endl ;  }    fout<<"读者信息\n";    for(int i=0;i<readercount;i++)    fout<<reader[i].getNum()<<'\t'<<reader[i].getName()<<'\t'<<reader[i].getCollege()<<'\t'<<reader[i].getClassno()<<endl;    fout.close();        }int inreaderFile( char * fileName, int delLine)   //获取读者信息{cout<<1<<endl;    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)   //添加读者    {        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;    }   void searchreaderbynum(string num){       //按学号查询读者        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){     //按学号精确查询读者        for(int i=0;i<readercount;i++)        if(reader[i].getNum()==num) {            cout<<i<<"\t";            reader[i].dispAReader();            return i;            }            return -1;        }    void searchreaderbyname(string nnname)     //按名字查询读者    {        for(int i=0;i<readercount;i++)        if(reader[i].getName()==nnname)        {            cout<<i<<"\t";            reader[i].dispAReader();           // return i;        }       // return -1;    }    int searchreaderbynamep(string nnname){//模糊查找        for(int i=0;i<readercount;i++)        if(reader[i].getName()==nnname) {            cout<<i<<"\t";            reader[i].dispAReader();            return i;            }            return -1;    }    void searchreaderbyzybj(string zzy)   //按学院查找    {        for(int i=0;i<readercount;i++)        if(reader[i].getCollege()==zzy)        {            cout<<i<<"\t";            reader[i].dispAReader();          //  return i;        }          //  return -1;    }    int searchreaderbyzybjp(string zzy){   //精确查找        for(int i=0;i<readercount;i++)        if(reader[i].getCollege()==zzy) {            cout<<i<<"\t";            reader[i].dispAReader();            return i;            }            return -1;    }    int searchreaderbyzybjjp(string bbj){  //按专业班级查找        for(int i=0;i<readercount;i++)        if(reader[i].getClassno()==bbj) {            cout<<i<<"\t";            reader[i].dispAReader();            return i;            }            return -1;    }    void searchreaderbyzybjj(string bbj)   //模糊查找    {        for(int i=0;i<readercount;i++)        if(reader[i].getClassno()==bbj)        {            cout<<i<<"\t";            reader[i].dispAReader();           // return i;        }           // return -1;    }    void deletereaderbyxuehao(string xxhh){        //按学号删除读者        int k=searchreaderbynump(xxhh);        if(k>=0)    {            cout<<"reader to be deleted :"<<endl;            reader[k].dispAReader();            reader[k]=reader[readercount-1];            cout<<"deletereaderbyxuehao successed:"<<endl;            readercount--;            //return bookcount;        }        else cout<<"deletereader  failed. No reader of xuehao="<<xxhh<<endl;        }        void deletereaderbyxingming(string xxh2h){        //按姓名删除读者        int k=searchreaderbynamep(xxh2h);        if(k>=0)    {            cout<<"reader to be deleted :"<<endl;            reader[k].dispAReader();            reader[k]=reader[readercount-1];            cout<<"deletereaderbyxingming successed:"<<endl;            readercount--;            //return bookcount;        }        else cout<<"deletereader  failed. No reader of xingming="<<xxh2h<<endl;        }        void sortreaderbyxuahao()   //按学号排序    {        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;            if(k!=i){                Reader t=reader[i];reader[i]=reader[k];reader[k]=t;                }        }    }    void sortreaderbyxueyuan()   //按学院排序    {        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;                }        }    }    void changereaderbyxuehao(string old,string news)    //修改学号    {         int k=searchreaderbynump(old);        if(k>=0)    {            reader[k].setNum(news);            cout<<"changereaderbyxuehao successed:"<<endl;           reader[k].dispAReader();        }        else cout<<"changereader failed. No reader of num="<<old<<endl;    }    void changereaderbyxingming(string old,string news)   //修改姓名    {         int k=searchreaderbynamep(old);        if(k>=0)    {            reader[k].setName(news);            cout<<"changereaderbyxuehao successed:"<<endl;           reader[k].dispAReader();        }        else cout<<"changereader failed. No reader of num="<<old<<endl;    }    void changereaderbyxueyuan(string old,string news)   //修改学院    {         int k=searchreaderbyzybjp(old);        if(k>=0)    {            reader[k].setCollege(news);            cout<<"changereaderbyxuehao successed:"<<endl;           reader[k].dispAReader();        }        else cout<<"changereader failed. No reader of num="<<old<<endl;    }    void changereaderbyzybj(string old,string news)   //修改专业班级    {         int k=searchreaderbyzybjjp(old);        if(k>=0)    {            reader[k].setClassno(news);            cout<<"changereaderbyxuehao successed:"<<endl;           reader[k].dispAReader();        }        else cout<<"changereader failed. No reader of num="<<old<<endl;    }  friend class ReaderBorrowBook;};class InBorrowBook{    public:    friend class ReaderBorrowBook;    BorrowBook *borrowbook;int borrowbookcount;   //borrowbook[n],借书总数    void searchborrowbookbyxuehao(string b)    {        for(int i=0;i<borrowbookcount;i++)        if(borrowbook[i].getNum()==b)        {            cout<<i<<"\t";            borrowbook[i].dispBorrowBook();           // return i;        }           // return -1;    }    void searchborrowbookbysm(string b)     //按书名查找借阅书    {        for(int i=0;i<borrowbookcount;i++)        if(borrowbook[i].getTitle()==b)        {            cout<<i<<"\t";            borrowbook[i].dispBorrowBook();           // return i;        }           // return -1;    }    void write2BorrowBookfile()   //写入借书文件    {        ofstream ffout( "d:\\borrowbook.txt", ios::out );        if ( !ffout )      { cerr << "File could not be open." << endl ;  }    ffout<<"借阅信息\n";    for(int i=0;i<borrowbookcount;i++)    {        Date bbb=borrowbook[i].getBorrowdate();        Date ddd=borrowbook[i].getToreturndate();        Date ccc=borrowbook[i].getReturndate();        ffout<<borrowbook[i].getNum()<<'\t'<<borrowbook[i].getName()<<'\t'<<borrowbook[i].getBookNum()<<'\t'<<borrowbook[i].getTitle()<<'\t'<<bbb.getYear()<<"/"<<bbb.getMonth()<<"/"<<bbb.getDay()<<'\t'<<ddd.getYear()<<"/"<<ddd.getMonth()<<"/" <<ddd.getDay()<<'\t'<<ccc.getYear()<<"/"<<ccc.getMonth()<<"/" <<ccc.getDay()<<endl;   }    }int inborrowbookFile( char * fileName, int delLine)   //获取借阅图书信息{cout<<1<<endl;    string num,name,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)     //按学号查询  {        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;  }};class ReaderBorrowBook{    InBook bk;   //声明三个类    InReader rd;    InBorrowBook bb;    public:    void write2file(){        bk.write2Bookfile();     //写入文件保存信息        rd.write2Readerfile();        bb.write2BorrowBookfile();        }    void init(){                                 //打开三个文件        bk.inbookFile( "d:\\book.txt", 1);        rd.inreaderFile( "d:\\reader.txt", 1);        bb.inborrowbookFile( "d:\\borrowbook.txt", 1);        }    void dispBook(){                     //显示书信息        for ( int i=0; i <bk.bookcount; i++ )            {cout <<i<<":";            bk.book[i].dispABook();}        }    void dispReader(){                    //显示读者信息        for ( int i=0; i <rd.readercount; i++ )            {cout <<i<<":";rd.reader[i].dispAReader();}        }    void dispBorrowbook(){                   //借书信息查询        for ( int i=0; i <bb.borrowbookcount; i++ )            {cout <<i<<":";bb.borrowbook[i].dispBorrowBook();}          }    void dispCount(){                         //总数显示        cout<<bk.bookcount<<endl;cout<<rd.readercount<<endl;cout<<bb.borrowbookcount<<endl;        }    void addbook()    //添加书    {        string num,title,author,publisher;        char num0[80],tit[80],auth[80],pub[80];        int pd,pm,py,howmany;        float price;        Date publishdate;        cout<<"书号、书名、作者、出版社、出版日期(yyyy mm dd)、定价、存馆数量"<<endl;        string num1="24416-5",title0="数据结构",author0="王红梅,胡明,王涛",pub0="清华大学出版社";        int pd0=1,pm0=1,py0=2012;        float price0=29.0;        int howmany0=10;        //bookcount=        cin>>num1>>title0>>author0>>pub0>>pd0>>pm0>>py0>>price0>>howmany0;        bk.addbook(num1,title0,author0,pub0,pd0,pm0,py0,price0,howmany0);        bk.write2Bookfile();        int i=bk.bookcount-1;        cout <<i<<":";        bk.book[i].dispABook();    }    void addreader(){                         //添加读者        string num,name,college,classno;        char num0[80],nam[80],coll[80],clas[80];        cout<<"学号\t姓名\t学院\t专业班级:"<<endl;        string num1="20151000",name0="王涛",college0="computer",class0="network class 1";        cin>>num1>>name0>>college0>>class0;        rd.addreader(num1,name0,college0,class0);        rd.write2Readerfile();        int i=rd.readercount-1;        cout <<i<<":";        rd.reader[i].dispAReader();        }    void searchBook(){                         //查书        cout<<"2．图书信息查询：分别按书名, 按作者名, 按出版社进行查询。"<<endl;        char tit[80];        string title="数据结构",author="胡明",pub="机械工业";        int i,j,k,select;        while(1){            cout<<"图书信息查询："<<endl;            cout<<"1．按书名查询"<<endl;            cout<<"2．按作者名查询"<<endl;            cout<<"3．按出版社查询"<<endl;            cout<<"0. return"<<endl;            cin>>select;            cin.get();            switch(select){                case 1:                    cout<<"书名:";                    getline(cin,title,'\n');                    bk.searchbookbytitle(title);                    break;                case 2:                    cout<<"作者名:";                    getline(cin,author,'\n');                    bk.searchbookbyauthor(author);                    break;                case 3:                    cout<<"出版社:";                    getline(cin,pub,'\n');                    bk.searchbookbypub(pub);break;                case 0:return;            }        }        }    void sortbook(){           //排序        int select;        cout<<"3．图书信息排序：按书号、书名等按升序进行排序。"<<endl;        cout<<"图书信息排序："<<endl;        cout<<"1．按书号排序"<<endl;        cout<<"2．按书名排序"<<endl;        cout<<"0. return"<<endl;        cin>>select;        switch(select){            case 1:                    cout<<"书号:";                    bk.sortbookbynum();                    dispBook();                    break;            case 2:                    cout<<"书名:";                    bk.sortbookbytitle();                    dispBook();                    break;            case 0:return;            }        }    void editbook(){                  //编辑书        string oldtitle="VisualBasic 程序设计教程",newtitle="VisualBasic 程序设计教程-C",oldnum="40667",newnum="40667-C";        int select;        cout<<"4．图书信息的修改、删除：按书号或书名进行图书的修改和删除。"<<endl;        while(1){        cout<<"图书信息的修改、删除："<<endl;        cout<<"1．按书号修改"<<endl;        cout<<"2．按书号删除"<<endl;        cout<<"3．按书名修改"<<endl;        cout<<"4．按书名删除"<<endl;        cout<<"0. return"<<endl;        cin>>select;        cin.get();        switch(select){            case 1:                    cout<<"old书号:";                    getline(cin,oldnum,'\n');                    cout<<"new书号:";                    getline(cin,newnum,'\n');                    cout<<"changebookbynum: "<<oldnum<<" to "<<newnum<<endl;                    bk.changebookbynum(oldnum,newnum);                    //dispBook();                    break;            case 2:                    cout<<"delete书号:";                    getline(cin,oldnum,'\n');                    cout<<"delete书号:"<<oldnum<<endl;                    bk.deletebookbynum(oldnum);                    //dispBook();                    break;            case 3:                    cout<<"old书名:";                    getline(cin,oldtitle,'\n');                    cout<<"new书名:";                    getline(cin,newtitle,'\n');                    cout<<"changebookbytitle: "<<oldtitle<<" to "<<newtitle<<endl;                    bk.changebookbytitle(oldtitle,newtitle);                    //dispBook();                    break;            case 4:                    cout<<"delete书名:";                    getline(cin,oldtitle,'\n');                    cout<<"deletebookbytitle: "<<oldtitle<<endl;                    bk.deletebookbytitle(oldtitle);                    //dispBook();                    break;            case 0:                      bk.write2Bookfile();                      cout<<"修改成功"<<endl;            return;            }        }    }    void readerborrowabook(){                       //借阅        cout<<"9．图书借阅：输入学号+书号，如果该书图书信息表中的存馆数量大于0，则可以借出，"<<endl;        string rdnum="20061709",booknum="33071",name,title;        int select,rdpos,bookpos,y,m,d;        while(1){            cout<<"图书借阅："<<endl;            cout<<"1．借书"<<endl;            cout<<"0．return"<<endl;            cin>>select;            cin.get();            if(select==0)return;            cout<<"borrow学号:";            getline(cin,rdnum,'\n');            cout<<"borrow书号:";            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); //修改图书信息表中的存馆数量                    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);//取系统时间，如果用GetSystemTime(&ct);那么获取的是格林尼治标准时间                    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<<" 存馆数量=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(){   //归还        cout<<"10．图书归还：输入学号+书名，修改图书信息表中的存馆数量，图书借阅表中记录该同学的归还日期。"<<endl;        char tit[80];        string rdnum="20061709",booknum="33071",name,title;        int selectttt,rdpos,bookpos,y,m,d;        while(1){            cout<<"图书归还："<<endl;            cout<<"1．还书"<<endl;            cout<<"0．return"<<endl;            cin>>selectttt;            cin.get();            if(selectttt==0) {return;}            cout<<"return学号:"<<endl;            getline(cin,rdnum,'\n');            cout<<"return书号:";            getline(cin,booknum,'\n');            bookpos=bk.searchbookbynump(booknum);            rdpos=rd.searchreaderbynump(rdnum);            int k;            k=bb.searchbyreaderbook(rdnum,booknum);            if(k>=0){            if(bookpos>0&&rdpos>0){                    bk.book[bookpos].setHowmany(bk.book[bookpos].getHowmany()+1);                    SYSTEMTIME ct;                    GetLocalTime(&ct);//取系统时间                    y=ct.wYear;                    m=ct.wMonth;                    d=ct.wDay;                    bb.borrowbook[k].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;            }}            else cout<<"No borrowbook "<<endl;        }        }    void searchreader()    {        string xuehao ,xingming,zzy,bbj;        cout<<"6.读者信息查询：分别按学号、姓名、班级等进行查询。"<<endl;        int selectt;        while(1){        cout<<"读者信息查询："<<endl;        cout<<"1．按学号查询"<<endl;        cout<<"2．按姓名查询"<<endl;        cout<<"3. 按学院查询"<<endl;        cout<<"4. 按专业班级查询"<<endl;        cout<<"0. return"<<endl;        cin>>selectt;        cin.get();        switch(selectt)        {            case 1: cout<<"学号："<<endl;            getline(cin,xuehao,'\n');            cout<<1<<endl;            rd.searchreaderbynum(xuehao);            break;            case 2:cout<<"姓名："<<endl;            getline(cin,xingming,'\n');            rd.searchreaderbyname(xingming);            break;            case 3:cout<<"学院： "<<endl;            getline(cin,zzy,'\n');            rd.searchreaderbyzybj(zzy);            break;            case 4:cout<<"专业班级： "<<endl;            getline(cin,bbj,'\n');            rd.searchreaderbyzybjj(bbj);            break;            case 0: return;        }        }    }    void sortreader()    {        int selectt1;        cout<<"7：读者信息排序：按学号、学院等按升序进行排序。"<<endl;        cout<<"读者信息排序："<<endl;        cout<<"1．按学号排序"<<endl;        cout<<"2．按学院排序"<<endl;        cout<<"0. return"<<endl;        cin>>selectt1;        switch(selectt1){            case 1:                    cout<<"学号:";                    rd.sortreaderbyxuahao();                    dispReader();                    break;            case 2:                    cout<<"学院:";                    rd.sortreaderbyxueyuan();                    dispReader();                    break;            case 0:return;            }        }void editreader(){    string xh,xm,xy,bj,newxh,newxm,newxy,newbj;    int select2;    cout<<"8．学生信息的修改、删除：。"<<endl;        while(1){        cout<<"学生信息的修改、删除："<<endl;        cout<<"1．按学号修改"<<endl;        cout<<"2．按学号删除"<<endl;        cout<<"3．按姓名修改"<<endl;        cout<<"4．按姓名删除"<<endl;        cout<<"0. return"<<endl;        cin>>select2;        cin.get();        switch(select2)        {            case 1:cout<<"要修改学生的学号为："<<endl;            cin>>xh;            cout<<"请输入新学号"<<endl;            cin>>newxh;            rd.changereaderbyxuehao(xh,newxh);            break;            case 2:cout<<"要删除的学生学号为："<<endl;            cin>>xh;            rd.deletereaderbyxuehao(xh);            break;            case 3:cout<<"修改的学生姓名为："<<endl;            cin>>xm;            cout<<"请输入修改后的姓名："<<endl;            cin>>newxm;            rd.changereaderbyxingming(xm,newxm);            break;            case 4:cout<<"要删除的学生姓名为："<<endl;            cin>>xm;            rd.deletereaderbyxingming(xm);            break;            case 0: rd.write2Readerfile();            cout<<"修改成功";            return;        }}}    void searchreaderborrowbook()    {        int bz;        string xxh,ssm;        while(1)        {cout<<"11．图书借阅查询：分别按学号、书名、学院等进行查询。"<<endl;        cout<<"1.按学号查询"<<endl;        cout<<"2.按书名查询"<<endl;        cout<<"0.return"<<endl;        cin>>bz;        switch(bz)    {            case 1:cout<<"请输入学号"<<endl;            cin>>xxh;            bb.searchborrowbookbyxuehao(xxh);break;            case 2:cout<<"请输入书名"<<endl;            cin>>ssm;bb.searchborrowbookbysm(ssm);break;            case 0:            return;        }    }    }};int main(){    ReaderBorrowBook rbb;    rbb.init();    rbb.dispBook();    rbb.dispReader();    rbb.dispBorrowbook();    rbb.dispCount();    int select;    while(1){        cout<<"菜单选择功能："<<endl;        cout<<"1．图书信息添加功能：包括书号、书名、作者、出版社名称、存馆数量、定价等"<<endl;        cout<<"2．图书信息查询：分别按书名, 按作者名, 按出版单位等进行查询。"<<endl;        cout<<"3．图书信息排序：按书号、书名等按升序进行排序。"<<endl;        cout<<"4．图书信息的修改、删除：按书号或书名进行图书的修改和删除。"<<endl;        cout<<"5．读者信息添加功能：包括学号、姓名、学院、专业班级等。"<<endl;        cout<<"6．读者信息查询：分别按学号、姓名、班级等进行查询。"<<endl;        cout<<"7．读者信息排序：按学号、学院等按升序进行排序。"<<endl;        cout<<"8．读者信息的修改、删除：按学号+姓名进行读者信息的修改和删除。"<<endl;        cout<<"9．图书借阅：输入学号+书号，如果该书图书信息表中的存馆数量大于0，则可以借出,"<<endl;        cout<<"借出相应数量后修改图书信息表中的存馆数量，在图书借阅表添加该同学的借阅。"<<endl;        cout<<"10．图书归还：输入学号+书名，修改图书信息表中的存馆数量，在图书借阅表中记录该同学的归还时间。"<<endl;        cout<<"11．图书借阅查询：分别按学号、书名、学院等进行查询。"<<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;}

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