总体思想

用C++开发图书馆管理系统需要对学生和图书分别建立class，调用class中的方法实现学生登陆账号借书，还书，图书馆管理员查看信息等操作。

Student.h

#pragma once
#include<string>
#include<vector>
#include<iostream>
#include<fstream>
#include<sstream>
#include<string>
using namespace std;class Student
{
private:int id;                          //student's ID numberint year;                        //student's gradestring name;string password;string gender;string telephone;string address;                  //student's name, password, gender, telephone number and addressvector<int> book;vector<int> grade;               //student's books and their marks
public:Student();~Student();Student(int a, int b, string c, string d, string e, string f, string g);//constructorsint get_id();int get_year();string get_name();string get_pass();string get_gend();string get_tele();string get_addr();vector<int> get_book();          //get the variables of classvoid change(int a, int b, string c, string d, string e, string f, string g);//change the informationvoid display();                  //display the information on the screenint length();                    //get the number of all studentsbool canopen();                  //check whether the file 'student.txt' can be openedvoid write();                    //write the information current into file 'student.txt'void read(int n);                //read the information of the number n student from file 'student.txt'void write_book();               //write the books information of the student into file 'mybook.txt' void read_book();                //read the infomation of the student from file 'mybook.txt'void change_book(int a, int b);  //change the information of vector book and gradevoid add_book(int a);            //add a new bookvoid display_book();             //display the information of books on the screenvoid add_student();              //add a student into the file 'mybook.txt'void sub_student();              //subtract a student in the file 'mybook.txt'bool is_same_book(int a);        //check whether there exist a same book in the file 'mybook.txt'
};Student::Student()
{id = 0;year = 0;name = "not given";password = "not given";gender = "not given";telephone = "not given";address = "not given";             //define the default constructor
}Student::~Student() {}Student::Student(int a, int b, string c, string d, string e, string f, string g)
{id = a;year = b;name = c;password = d;gender = e;telephone = f;address = g;                       //define the normal constructor
}int Student::get_id()
{return id;
}int Student::get_year()
{return year;
}string Student::get_name()
{return name;
}string Student::get_pass()
{return password;
}string Student::get_gend()
{return gender;
}string Student::get_tele()
{return telephone;
}string Student::get_addr()
{return address;
}vector<int> Student::get_book()
{return book;
}void Student::change(int a, int b, string c, string d, string e, string f, string g)
{id = a;year = b;name = c;password = d;gender = e;telephone = f;address = g;
}void Student::display()
{cout << "Name:   " << name << endl;cout << "ID number:   " << id << endl;cout << "Grade:   " << year << endl;cout << "Gender:   " << gender << endl;cout << "Telephone:   " << telephone << endl;cout << "Address:   " << address << endl << endl;
}int Student::length()
{int i = 0;string temp;ifstream fin("student.txt");while (getline(fin, temp))i += 1;fin.close();return i;
}bool Student::canopen()
{ifstream fin1("student.txt");ifstream fin2("mybook.txt");if (fin1&&fin2)return 1;elsereturn 0;fin1.close();fin2.close();
}void Student::write()
{ofstream fout("student.txt", ios::app);fout << id << "\t" << year << "\t" << name << "\t" << password << "\t" << gender << "\t" << telephone << "\t" << address << endl;fout.close();
}void Student::read(int n)
{int i = 0;string temp, data[999], a[6];ifstream fin("student.txt");while (getline(fin, temp)){data[i] = temp;i += 1;}fin.close();istringstream stream(data[n]);for (i = 0; i < 6; i++){data[n].erase(0, data[n].find("\t") + 1);a[i] = data[n].substr(0, data[n].find("\t"));}name = a[1];password = a[2];gender = a[3];telephone = a[4];address = a[5];stream >> id >> year;
}void Student::write_book()
{int i, n, l = 0;string data[999], temp;ifstream fin("mybook.txt");while (getline(fin, temp)){data[l] = temp;l += 1;}fin.close();ofstream fout("mybook.txt");for (i = 0; i < l; i++){istringstream stream(data[i]);stream >> n;if (n == id){fout << id;for (int i = 0; i < book.size(); i++)fout << "\t" << book[i] << "\t" << grade[i];fout << endl;}elsefout << data[i] << endl;}fout.close();
}void Student::read_book()
{int i = 0, x, y, n;string data[999], temp;ifstream fin("mybook.txt");while (getline(fin, temp)){data[i] = temp;i += 1;}fin.close();for (i = 0; i < 999; i++){istringstream stream(data[i]);stream >> n;if (id == n)while (stream >> x >> y){book.push_back(x);grade.push_back(y);}}
}void Student::change_book(int a, int b)
{int i;for (i = 0; i < book.size(); i++)if (book[i] == a)grade[i] = b;
}void Student::add_book(int a)
{book.push_back(a);grade.push_back(-1);
}void Student::display_book()
{int i;for (i = 0; i < book.size(); i++){cout << book[i] << "\t\t";if (grade[i] == -1)cout << "None." << endl;elsecout << grade[i] << endl;}
}void Student::add_student()
{ofstream fout("mybook.txt", ios::app);fout << id << endl;fout.close();
}void Student::sub_student()
{int i = 0, n, m, l;string data[999], temp;ifstream fin("mybook.txt");while (getline(fin, temp)){data[i] = temp;i += 1;}fin.close();l = i;for (i = 0; i < l; i++){istringstream stream(data[i]);stream >> n;if (id == n)m = i;}ofstream fout("mybook.txt");for (i = 0; i < l; i++)if (i != m)fout << data[i] << endl;fout.close();
}bool Student::is_same_book(int a)
{int i;bool success = 0;for (i = 0; i < book.size(); i++)if (book[i] == a)success = 1;return success;
}

Book.h

#pragma once
#include<iostream>
#include<fstream>
#include<string>
#include<sstream>
using namespace std;class Book
{
private:int id;string name;string professor;                //the information of a bookint place;                       //left seatsint year;                        //available to which grades
public:Book();~Book();Book(int a, string b, string c, int d, int e);int get_id();string get_name();string get_prof();int get_place();int get_year();                  //get the variables of classvoid change(int a, string b, string c, int d, int e);//change the informationvoid display();                  //display the information on the screenint length();                    //get the number of all the Booksbool canopen();                  //check whether the file 'book.txt' can be openedvoid write();                    //write the information into the file 'book.txt'void read(int n);                //read the information of number n book form the file 'book.txt'
};Book::Book()
{name = "not given";id = 0;professor = "not given";place = 0;year = 0;                         //difine the default constructor
}Book::~Book() {}Book::Book(int a, string b, string c, int d, int e)
{id = a;name = b;professor = c;place = d;year = e;                         //define the normal constructor
}int Book::get_id()
{return id;
}
string Book::get_name()
{return name;
}
string Book::get_prof()
{return professor;
}
int Book::get_place()
{return place;
}
int Book::get_year()
{return year;
}void Book::change(int a, string b, string c, int d, int e)
{id = a;name = b;professor = c;place = d;year = e;
}void Book::display()
{cout << "Name:   " << name << endl;cout << "ID number:   " << id << endl;cout << "Professor:   " << professor << endl;cout << "Left seats:   " << place << endl;cout << "Available grade:   ";if (year > 0 && year < 5)cout << "year " << year;else if (year == 5)cout << "All of students.";elsecout << "error in data.";cout << endl << endl;
}int Book::length()
{int i = 0;string temp;ifstream fin("book.txt");while (getline(fin, temp))i += 1;fin.close();return i;
}bool Book::canopen()
{ifstream fin1("book.txt");if (fin1)return 1;elsereturn 0;fin1.close();
}void Book::write()
{ofstream fout("book.txt", ios::app);fout << id << "\t" << place << "\t" << year << "\t" << name << "\t" << professor << "\t" << endl;fout.close();
}void Book::read(int n)
{int i = 0;string temp, data[999], a[4];ifstream fin("book.txt");while (getline(fin, temp)){data[i] = temp;i += 1;}fin.close();istringstream stream(data[n]);for (i = 0; i < 4; i++){data[n].erase(0, data[n].find("\t") + 1);a[i] = data[n].substr(0, data[n].find("\t"));}name = a[2];professor = a[3];stream >> id >> place >> year;
}

main.cpp

#include<iostream>
#include<string>
#include<vector>
#include"Book.h"
#include"Student.h"
using namespace std;void initialize();
bool is_administrator();
bool is_student(int *n);
void menu1();
void menu2();
void menu3();
void wrong_input();
void mag_book();
void mag_student();
void show_book_list();
void show_student_list();
void give_mark();
void change_password();
void choose_book(int n);
void my_book(int n);
void check_info(int n);
void can_open(Book a);
void can_open(Student a);
bool is_same_student_name(string n);
bool is_same_student_tele(string n);
bool is_same_student_addr(string n);
bool is_same_book_name(string n);int main()
{int user;char choice;bool success = 0;initialize();do {menu1();cin >> choice;switch (choice){case'1':{if (is_administrator()) {do {menu2();cin >> choice;getchar();switch (choice){case'1':mag_book(); success = 0; break;case'2':mag_student(); success = 0; break;case'3':show_book_list(); success = 0; break;case'4':show_student_list(); success = 0; break;case'5':give_mark(); success = 0; break;case'6':change_password(); success = 0; break;case'9':success = 1; break;case'0':success = 1; break;default:wrong_input(); break;}} while (!success);}else{cout << "The password is incorrect." << endl;system("pause");}}break;case'2':{if (is_student(&user)){do {menu3();cin >> choice;switch (choice){case'1':choose_book(user); success = 0; break;case'2':my_book(user); success = 0; break;case'3':check_info(user); success = 0; break;case'9':success = 1; break;case'0':success = 1; break;default:wrong_input(); break;}} while (!success);}else{cout << "Your name or password is incorrect." << endl;system("pause");}}break;case'0':success = 1; break;default:wrong_input(); break;}} while (choice != '0');return 0;
}void initialize()
{ifstream infile1("book.txt");if (!infile1){ofstream outfile1("book.txt");outfile1.close();}infile1.close();ifstream infile2("student.txt");if (!infile2){ofstream outfile2("student.txt");outfile2.close();}infile2.close();ifstream infile3("password.txt");if (!infile3){ofstream outfile3("password.txt");outfile3 << "123";outfile3.close();}infile3.close();ifstream infile4("mybook.txt");if (!infile4){ofstream outfile4("mybook.txt");outfile4.close();}infile4.close();
}
bool is_administrator()
{string p1, p2;getchar();cout << "Please input the password:";getline(cin, p1);ifstream infile("password.txt");if (!infile){cout << endl << "Out of service" << endl;cout << "Please press enter to exit." << endl;system("pause");exit(0);}getline(infile, p2);infile.close();if (p1 == p2)return 1;elsereturn 0;
}
bool is_student(int *n)
{Student a[100];Student s;string p1, p2;int i;bool success = 0;getchar();cout << "Please input your name:";getline(cin, p1);cout << "Please input your password:";getline(cin, p2);can_open(s);for (i = 0; i < s.length(); i++){a[i].read(i);if (a[i].get_name() == p1 && a[i].get_pass() == p2){*n = i;success = 1;}}return success;
}
void menu1()
{system("cls");cout << endl << endl << endl;cout << "-------------------------------------------------------------------" << endl;cout << "                University Student Management System               " << endl << endl;cout << "      1.Administrator System." << endl << endl;cout << "      2.Student System." << endl << endl;cout << "      0.Exit." << endl;cout << "-------------------------------------------------------------------" << endl;cout << "Please input your choice:";
}
void menu2()
{system("cls");cout << endl << endl << endl;cout << "-------------------------------------------------------------------" << endl;cout << "                          Administrator System   " << endl << endl;cout << "      1.Book Management." << endl << endl;cout << "      2.Student Management." << endl << endl;cout << "      3.Show the Book List." << endl << endl;cout << "      4.Show the Student List." << endl << endl;cout << "      5.Give Marks to Students." << endl << endl;cout << "      6.Change Administrator Password." << endl << endl;cout << "      9.Return to the main menu." << endl << endl;cout << "      0.Exit." << endl;cout << "-------------------------------------------------------------------" << endl;cout << "Please input your choice:";
}
void menu3()
{system("cls");cout << endl << endl << endl;cout << "-------------------------------------------------------------------" << endl;cout << "                          Student System" << endl << endl;cout << "      1.Choose My Books" << endl << endl;cout << "      2.Check My Books and Grades" << endl << endl;cout << "      3.Check and Change My Infomation" << endl << endl;cout << "      9.Return to the main menu." << endl << endl;cout << "      0.Exit." << endl;cout << "-------------------------------------------------------------------" << endl;cout << "Please input your choice:";
}
void wrong_input()
{system("cls");cout << endl << endl << endl << endl << endl << endl;cout << "                        Wrong input! Please input again." << endl;system("pause");
}
void mag_book()
{int i, id, plac, year;char choice;bool success = 0, success2 = 0;string name, prof;Book a[50];Book c;do {fflush(stdin);system("cls");cout << endl << "                     Book Management" << endl << endl;cout << "Which operation do you want about the list of book?" << endl;cout << "1.Browse a book\n\n2.Add a book\n\n3.Modify a book\n\n4.Delete a book\n\n";cin >> choice;cout << "Please input the ID number of book:";cin >> id;getchar();can_open(c);if (choice == '1'){success2 = 1;fflush(stdin);for (i = 0; i < c.length(); i++)a[i].read(i);for (i = 0; i < c.length(); i++)if (id == a[i].get_id()){system("cls");a[i].display();success = 1;}if (!success)cout << "The book cannot be found.";}else if (choice == '2'){success2 = 1;fflush(stdin);for (i = 0; i < c.length(); i++){a[i].read(i);if (id == a[i].get_id())success = 1;}if (success)cout << "The book is exist";else{do {cout << "Please input the name of book:";getline(cin, name);} while (is_same_book_name(name));cout << "Please input the professor's name:";getline(cin, prof);cout << "Please input the maximum quota of people(connot change later):";cin >> plac;cout << "Which grades are available?" << endl << "1. year 1\n2. year 2\n3. year 3\n4. year 4\n5. all of students\n";cin >> year;c.change(id, name, prof, plac, year);c.write();system("cls");cout << "The book has been saved." << endl << endl;c.display();}}else if (choice == '3'){success2 = 1;fflush(stdin);int l, n;l = c.length();for (i = 0; i < l; i++){a[i].read(i);if (id == a[i].get_id()){n = i;success = 1;}}if (success){do {cout << "Please input the new name of book " << id << ":";getline(cin, name);} while (is_same_book_name(name));cout << "Please input the new professor's name of book " << id << ":";getline(cin, prof);cout << "Which grades are available?" << endl << "1. year 1\n2. year 2\n3. year 3\n4. year 4\n5. all of students\n";cin >> year;a[n].change(id, name, prof, a[n].get_place(), year);ofstream fout("book.txt");fout.close();for (i = 0; i < l; i++)a[i].write();system("cls");cout << "The book has been changed." << endl << endl;a[n].display();}elsecout << "The book " << id << " cannot be found.";}else if (choice == '4'){success2 = 1;fflush(stdin);int n, l = c.length();for (i = 0; i < l; i++){a[i].read(i);if (id == a[i].get_id()){n = i;success = 1;}}if (success){ofstream fout("book.txt");fout.close();for (i = 0; i < l - 1; i++)if (i != n)a[i].write();system("cls");cout << "The book has been deleted." << endl << endl;a[n].display();}elsecout << "The book " << id << " cannot be found.";}else{cout << "wrong input, please input again." << endl;system("pause");}} while (!success2);cout << endl;system("pause");
}
void mag_student()
{int i, id, year;char choice;bool success = 0, success2 = 0;string name, pass, gend, tele, addr;Student a[50];Student s;do {system("cls");cout << endl << "                     Student Management" << endl << endl;cout << "Which operation do you want about the list of student?" << endl;cout << "1.Browse a student\n2.Add a student\n3.Modify a student\n4.Delete a student\n";cin >> choice;cout << "Please input the ID number of student:";cin >> id;getchar();can_open(s);if (choice == '1'){success2 = 1;fflush(stdin);for (i = 0; i < s.length(); i++)a[i].read(i);for (i = 0; i < s.length(); i++)if (id == a[i].get_id()){system("cls");a[i].display();success = 1;}if (!success)cout << "The student cannot be found.";}else if (choice == '2'){success2 = 1;fflush(stdin);for (i = 0; i < s.length(); i++){a[i].read(i);if (id == a[i].get_id())success = 1;}if (success)cout << "The student is exist";else{do {cout << "Please input the name of student:";getline(cin, name);} while (is_same_student_name(name));cout << "Please input the password:";getline(cin, pass);do {cout << "What grade is the student in? (1-4)";cin >> year;} while (year < 1 || year>4);fflush(stdin);do {cout << "Please input the student's gender:" << endl << "Please enter 'male' or 'female'  :";getline(cin, gend);} while (!(gend == "male" || gend == "female"));do {cout << "Please input the telephone number:";getline(cin, tele);} while (is_same_student_tele(tele));do {cout << "Please input the address:";getline(cin, addr);} while (is_same_student_addr(addr));s.change(id, year, name, pass, gend, tele, addr);s.add_student();s.write();			system("cls");cout << "The information of student has been saved." << endl << endl;s.display();		}}else if (choice == '3'){success2 = 1;fflush(stdin);int l, n;l = s.length();for (i = 0; i < l; i++){a[i].read(i);if (id == a[i].get_id()){n = i;success = 1;}}if (success){do {cout << "Please input the new name of student " << id << ":";getline(cin, name);} while (is_same_student_name(name));pass = a[n].get_pass();do {cout << "What grade is the student in? (1-4)";cin >> year;} while (year < 1 || year>4);fflush(stdin);do {cout << "Please input the student's gender:" << endl << "Please enter 'male' or 'female'  :";getline(cin, gend);} while (!(gend == "male" || gend == "female"));do {cout << "Please input the new telephone number:";getline(cin, tele);} while (is_same_student_tele(tele));do {cout << "Please input the new address:";getline(cin, addr);} while (is_same_student_addr(addr));a[n].change(id, year, name, pass, gend, tele, addr);ofstream fout("student.txt");fout.close();for (i = 0; i < l; i++)a[i].write();system("cls");cout << "The student has been changed." << endl << endl;a[n].display();}elsecout << "The student " << id << " cannot be found.";}else if (choice == '4'){success2 = 1;fflush(stdin);int n, l = s.length();for (i = 0; i < l; i++){a[i].read(i);if (id == a[i].get_id()){n = i;success = 1;}}if (success){a[n].sub_student();ofstream fout("student.txt");fout.close();for (i = 0; i < l; i++)if (i != n)a[i].write();system("cls");cout << "The student has been deleted." << endl << endl;a[n].display();}elsecout << "The student " << id << " cannot be found.";}else{cout << "Wrong input, please input again." << endl;system("pause");}} while (!success2);cout << endl;system("pause");
}
void show_book_list()
{Book a[100];Book c;int i;system("cls");cout << endl << "                     Books List" << endl << endl;can_open(c);for (i = 0; i < c.length(); i++){a[i].read(i);a[i].display();}cout << endl;system("pause");
}
void show_student_list()
{Student a[100];Student s;int i;system("cls");cout << endl << "                     Students List" << endl << endl;can_open(s);for (i = 0; i < s.length(); i++){a[i].read(i);a[i].display();}cout << endl;system("pause");
}
void give_mark()
{int i, j, k = 0, id, temp;bool success = 0;vector<int> student, mark;Student a[999];Student s;Book b[999];Book c;system("cls");cout << endl << "                     Give Marks" << endl << endl;cout << "Please input the ID number of book:";cin >> id;for (i = 0; i < c.length(); i++){b[i].read(i);if (b[i].get_id() == id)success = 1;}if (!success)cout << "The book " << id << " is not exist." << endl;else{cout << "These student(s) are your student(s):";for (i = 0; i < s.length(); i++){a[i].read(i);a[i].read_book();for (j = 0; j < a[i].get_book().size(); j++)if (id == a[i].get_book()[j]){k += 1;cout << endl << k << ". " << a[i].get_name();student.push_back(i);break;}}cout << endl << "Please give marks;" << endl;for (i = 0; i < k; i++){cout << a[student[i]].get_name() << ":   ";cin >> temp;a[student[i]].change_book(id, temp);}for (i = 0; i < s.length(); i++)a[i].write_book();cout << endl << "Giving marks successfully!";}cout << endl;system("pause");
}
void change_password()
{string p1, p2, p3;system("cls");cout << endl << "                 Change Administrator Password." << endl << endl;cout << "Please input the password:";getline(cin, p1);ifstream infile("password.txt");if (!infile){cout << endl << "Out of service" << endl;cout << "Please press enter to exit." << endl;system("pause");exit(0);}getline(infile, p2);infile.close();if (p1 == p2){cout << "Please input the new password:";getline(cin, p3);ofstream outfile("password.txt");outfile << p3;outfile.close();cout << "The administrator password has been changed.";}elsecout << "Wrong password.";cout << endl;system("pause");
}
void choose_book(int n)
{int i, l, m, id;bool success = 0;bool can_choose[999];Student a[999];Student s;Book b[999];Book c;system("cls");cout << endl << "                     Choose My Books" << endl << endl;can_open(s);can_open(c);l = c.length();for (i = 0; i < s.length(); i++){a[i].read(i);a[i].read_book();}cout << "                                                   Welcome," << a[n].get_name() << endl << endl;for (i = 0; i < l; i++){b[i].read(i);if (((b[i].get_year() == a[n].get_year()) || b[i].get_year() == 5) && (b[i].get_place() > 0)){can_choose[i] = 1;cout << "Status:   Available" << endl;b[i].display();}else{can_choose[i] = 0;cout << "Status:   Unavailable" << endl;b[i].display();}}do {cout << "Please input the ID number of the book you want to choose:";cin >> id;success = 0;for (i = 0; i < l; i++)if (b[i].get_id() == id){m = i;success = 1;}} while (!success);system("cls");cout << endl << endl << endl;if (can_choose[m]){if (a[n].is_same_book(id))cout << "                  You have selected the book " << id << endl;else{b[m].change(b[m].get_id(), b[m].get_name(), b[m].get_prof(), b[m].get_place() - 1, b[m].get_year());ofstream outfile("book.txt");outfile.close();for (i = 0; i < l; i++)b[i].write();a[n].add_book(id);a[n].write_book();cout << "Here is the list of your books now:" << endl << endl << "ID\t\tGrade" << endl;a[n].display_book();}}elsecout << "               The book '" << b[m].get_name() << "' cannot be selected." << endl;system("pause");
}
void my_book(int n)
{int i, l;Student a[999];Student s;system("cls");cout << endl << "                     Check My Books ang Grades" << endl << endl;can_open(s);l = s.length();for (i = 0; i < l; i++)a[i].read(i);cout << "                                                        Welcome," << a[n].get_name() << endl << endl;a[n].read_book();cout << "Book ID\tGrade" << endl << endl;a[n].display_book();system("pause");
}
void check_info(int n)
{int i, l;char choice;bool success = 0;string tele, addr, pass;Student a[999];Student s;system("cls");cout << endl << "                     Check and Change My Information" << endl << endl;can_open(s);l = s.length();for (i = 0; i < l; i++)a[i].read(i);cout << "                                                              Welcome," << a[n].get_name() << endl << endl;a[n].display();cout << endl << "Enter 1: Change my information." << endl;cout << "Enter 2: Change my password." << endl;cout << "Enter else: Return to the student menu:";cin >> choice;getchar();if (choice == '1'){do {cout << "Please input the new telephone number:";getline(cin, tele);} while (is_same_student_tele(tele));do {cout << "Please input the new address:";getline(cin, addr);} while (is_same_student_addr(addr));a[n].change(a[n].get_id(), a[n].get_year(), a[n].get_name(), a[n].get_pass(), a[n].get_gend(), tele, addr);ofstream outfile("student.txt");outfile.close();for (i = 0; i < l; i++)a[i].write();cout << "The information has been changed:" << endl;a[n].display();system("pause");}else if (choice == '2'){cout << "Please input the new password.";getline(cin, pass);a[n].change(a[n].get_id(), a[n].get_year(), a[n].get_name(), pass, a[n].get_gend(), a[n].get_tele(), a[n].get_addr());ofstream outfile("student.txt");outfile.close();for (i = 0; i < l; i++)a[i].write();cout << "The password has been changed." << endl;system("pause");}
}
void can_open(Book a)
{if (!a.canopen()){cout << endl << "The file cannot open.";cout << endl << "You have to restart the program to repair the error.";cout << endl << "Press enter to exit." << endl;system("pause");exit(0);}
}
void can_open(Student a)
{if (!a.canopen()){cout << endl << "The file cannot open.";cout << endl << "You have to restart the program to repair the error.";cout << endl << "Press enter to exit." << endl;system("pause");exit(0);}
}
bool is_same_student_name(string n)
{int i;bool success = 0;Student a[999];Student s;for (i = 0; i < s.length(); i++){a[i].read(i);if (a[i].get_name() == n){cout << "There exist the same name." << endl;success = 1;}}return success;
}
bool is_same_student_tele(string n)
{int i;bool success = 0;Student a[999];Student s;for (i = 0; i < s.length(); i++){a[i].read(i);if (a[i].get_tele() == n){cout << "There exist the same telephone number." << endl;success = 1;}}return success;
}
bool is_same_student_addr(string n)
{int i;bool success = 0;Student a[999];Student s;for (i = 0; i < s.length(); i++){a[i].read(i);if (a[i].get_addr() == n){cout << "There exist the same address." << endl;success = 1;}}return success;
}
bool is_same_book_name(string n)
{int i;bool success = 0;Book a[999];Book c;for (i = 0; i < c.length(); i++){a[i].read(i);if (a[i].get_name() == n){cout << "There exist the same name." << endl;success = 1;}}return success;
}