Hello everyone, my classmate is making a library manager program and he was able to read the items on the txt file, however when we run his program a couple of times it did not read the txt file again can someone help us with this?
#include <iostream>
#include <string>
#include <fstream>
#include <iomanip>
using namespace std;
struct book
{
string ISBN;
string author;
string title;
string publisher;
string cpyryt;
int quantity;
int qborrowed;
book *link;
};
class Library
{
public:
void addBook();
void searchBook();
void removeBook();
void editBook();
void borrowBook();
void returnBook();
void sortList();
void viewList();
void displayMenu();
void readFile();
};
int main()
{
Library obj;
//obj.addBook();
obj.viewList();
system("pause");
return 0;
}
void Library::addBook()
{
Library obj;
book *head = NULL;
book *newBook;
book *current = head;
ifstream infile;
infile.open("LibraryData.txt");
if (infile.is_open())
{
while (!infile.eof())
{
newBook = new book;
infile.ignore(100,'#');
getline(infile,newBook->ISBN);
infile.ignore(100,'#');
getline(infile, newBook->author);
infile.ignore(100,'#');
getline(infile, newBook->title);
infile.ignore(100,'#');
getline(infile, newBook->publisher);
infile.ignore(100,'#');
getline(infile, newBook->cpyryt);
infile >> newBook->quantity;
infile >> newBook->qborrowed;
newBook->link = NULL;
if (head == NULL)
{
head = newBook;
current = newBook;
}
else
{
current->link = newBook;
current = newBook;
}
}
}
infile.close();
////--------------get data from user
//newBook = new book;
//
//cout<<"Enter the ISBN: ";
//getline(cin,newBook->ISBN);
//cout<<"Enter the author of the book: ";
//getline(cin,newBook->author);
//cout<<"Enter the title of the book: ";
//getline(cin,newBook->title);
//cout<<"Enter the publisher of the book: ";
//getline(cin,newBook->publisher);
//cout<<"Enter the copyright date: ";
//getline(cin,newBook->cpyryt);
//newBook->quantity = 1;
//newBook->qborrowed = 0;
//newBook->link = NULL;
//if (head == NULL)
//{
// head = newBook;
// current = newBook;
//}
//else
//{
// current->link = newBook;
// current = newBook;
//}
//
////-------------save data to file
//ofstream outfile;
//outfile.open("LibraryData.txt");
//outfile.clear();
//current = head;
//while (current != NULL)
//{
// outfile<<"#"<<current->ISBN;
// outfile<<"\n#"<<current->author;
// outfile<<"\n#"<<current->title;
// outfile<<"\n#"<<current->publisher;
// outfile<<"\n"<<current->cpyryt;
// outfile<<"\n"<<current->quantity;
// outfile<<"\n"<<current->qborrowed;
// current = current->link;
//}
//outfile.close();
}
void Library::viewList()
{
book *head = NULL;
book *newBook;
book *current = head;
ifstream infile;
infile.open("LibraryData.txt");
if (infile.is_open())
{
while (!infile.eof())
{
newBook = new book;
infile.ignore(100,'#');
getline(infile,newBook->ISBN);
infile.ignore(100,'#');
getline(infile, newBook->author);
infile.ignore(100,'#');
getline(infile, newBook->title);
infile.ignore(100,'#');
getline(infile, newBook->publisher);
infile.ignore(100,'#');
getline(infile, newBook->cpyryt);
infile >> newBook->quantity;
infile >> newBook->qborrowed;
newBook->link = NULL;
if (head == NULL)
{
head = newBook;
current = newBook;
}
else
{
current->link = newBook;
current = newBook;
}
}
}
infile.close();
cout<<"South Hub Institute of Technology"
<<"\nLibrary"<<endl;
current = head;
while (current != NULL)
{
cout << "--------------------------------------------------------------------------------" << endl;
cout << current->ISBN << "\t" << current->title << endl;
cout << "\t\t\t" << current->author << endl;
cout << "\t\t\t" << current->publisher << endl;
cout << "\t\t\t" << current->cpyryt << endl;
current = current->link;
}
}
void Library::displayMenu()
{
}
