Pasted

#include <iostream>
#include <string>
#include <fstream>
#include <string.h>
using namespace std;
 
 
void welcomeMessage();
string userName;
string userPassword;
string login_details[2][100] = {
  {"Kevin","Myra","Usman","Latif"},
  {"1234","5678","asdf","zxcv"}
};
int current = 4;
int ls;
int admin_login();
int student_login();
void addBookinDataBase();
void searchbook();
void deletebook();
void updatepassword();
void login();
 
int main() {
    welcomeMessage();
    login();
    admin_login();
}
void welcomeMessage()
{
    cout << ("If require assist please contact: [email protected]");
    cout << ("\n\n");
    cout << ("\n\t\t\t  **************************************************");
    cout << ("\n\t\t\t  *                                                  *");
    cout << ("\n\t\t\t  *                     WELCOME                      *");
    cout << ("\n\t\t\t  *                       TO                         *");
    cout << ("\n\t\t\t  *                     LIBRARY                      *");
    cout << ("\n\t\t\t  *                                                  *");
    cout << ("\n\t\t\t  ****************************************************\n\n");
}
 
void login() {
    int choice;
    cout << "1. Admin Login" << endl;
    cout << "2. Student Login" << endl;
    cout << "3. Exit" << endl;
    cin >> choice;
    cout << endl;
    if (choice == 1) {
        cout << "Username: ";
        cin >> userName;
        cout << "Password: ";
        cin >> userPassword;
        for (int a = 0; a < current; a++)
        {
            if (login_details[0][a] == userName) {
                if (login_details[1][a] == userPassword) {
                    cout << "\nWelcome " << login_details[0][a] << endl;
                    cout << "\nThank you " << userName << " for logging in.\n";
                    ls = 1;
                }
            }
        }
        while (ls == 0) {
            cout << "Login was unsuccessful please try again" << endl;
            login();
        }
    }
    else if (choice == 2) {
        cout << "Username: ";
        cin >> userName;
        cout << "Password: ";
        cin >> userPassword;
        for (int a = 0; a < current; a++)
        {
            if (login_details[0][a] == userName) {
                if (login_details[1][a] == userPassword) {
                    cout << "\nWelcome " << login_details[0][a] << endl;
                    cout << "\nThank you student for logging in.\n";
                    ls = 1;
                }
            }
        }
        while (ls == 0) {
            cout << "Login was unsuccessful please try again" << endl;
            login();
        }
    }
 
}
int admin_login()
{
    int choice;
    string bookid;
    string decision;
    string bookname;
    string line;
    string books[50];
    string book_id[50];
    fstream myfile;
    myfile.open("booksrecord.txt");
    int counter = 0;
    while (myfile >> bookid >> bookname)
    {
        books[counter] = bookname;
        book_id[counter] = bookid;
        counter++;
    }
    do {
        cout << "1.Add Book " << endl;
        cout << "2.Search Books " << endl;
        cout << "3.List Books " << endl;
        cout << "4.Delete Books " << endl;
        cout << "5.Update Password " << endl;
        cout << "6.Exit" << endl;
        cin >> choice;
        cout << endl;
 
        if (choice == 1) {
            cout << "Enter Book ID: " << endl;
            cout << "Yes or No" << endl;
            cin >> decision;
            if (decision == "Yes") {
                cout << " enter the book id";
                cin >> bookid;
                cout << "enter the book name";
                cin >> bookname;
 
                myfile << bookid << " " << bookname << endl;
            }
        }
        else if (choice == 2) {
            cout << "Enter the bookid: " << endl;
 
        }
        else if (choice == 3) {
            cout << "Book list: \n " << endl;
            for (int i = 0; i < 5; i++)  
            {
                cout << book_id[i] << ". " << books[i] << endl;
            }
            
        }
 
    } while (choice != 0);
 
    system("pause");
    return 0;
 
}