How to edit a text file content ?

[nvrmnd]

Hello, i am making a library program that can store books and their information, eg.. Title, author.. to a text file. My problem is how can i edit the text file content or delete a line.

This is what the text file look like:

The C++ Programming Language
Bjarne Stroustrup
The C Programming Language 2nd Edition
Daniel Kerninghan & Dennis Rithcie

What if i want to replace Line 2 with something else? How do i do that..

By the way this is my addBook() function:
This works correctly but as i said how can i edit file content?

void addBook()
{
    // Create write only object
    // ios::out --open for output only
    // ios::app --writing operations performed at the end of file
    ofstream listOfBooks (CONFIG_FILE, ios::out | ios::app);
    clearScreen();
    
    string title, author;
    cout <<"====================\n";
    cout <<"     Add a book     \n";
    cout <<"====================\n";
    cout <<"#Enter Information Below:\n";
    
    cout <<"\nTitle: ";
    getline (cin, title);
    cout <<"Author: ";
    getline (cin, author);
	
    // Write to File:
    listOfBooks << title <<"\n";
    listOfBooks << author <<"\n";

    cout <<"\n\n#Succesfully added:\n\n";
    cout << "--" << title << "\n";
    cout << "--" << author;
    cout << "\n\n\n\n#Press any key to continue.";
    getch();
    
    listOfBooks.close(); // Close File
}

[tath]

read file to memory, modify what you want, write memory content to file.

[IWishIKnew]

You can use an STL object, an array, (if you know the size) or write your own linked list.

At the beginner level, (unless your instructor tells you not to) I would suggest using a vector. Vectors can be dynamically resized, randomly accessed, and have convenient member functions.

Another methode would be to use the getline(istream&, string&), and write a new file, then erase the old.

[nvrmnd]

Ok, thank you all, i'll google for that.. now that i have an idea how to do it .