In C++, how is the readfile function written for this program? ### Function: readFile()#### Description:The `readFile()` function is designed to accept the filestream opened in the main function. This filestream will enable looping through the file, extracting each book's information, and inserting this data into a book object, which is then appended to an array of book objects. #### Instructions:1. **Accept the Filestream:** Ensure that the function accepts the filestream that has been opened in the main function.2. **Process the File:** Use the filestream to read through the file line by line.3. **Extract Book Information:** Insert the information from each line into a book object.4. **Store in Array:** Add each book object to an array of books.5. **Reading Strategies:** Utilize `getline()` and type casting functions like `stoi` and `stof` to handle numerical conversions where necessary, since `cin` stops reading at whitespace.6. **Return Value:** The function should return the total number of lines read from the file.7. **Note:** The function should not open the filestream itself; it only works with the filestream passed to it.#### Example Usage:```cppvoid readFile(std::ifstream &fileStream, std::vector &books) { // Implementation goes here}int main() { std::ifstream file("books.txt"); std::vector booksArray; int linesRead = readFile(file, booksArray); // Further processing}```By following these guidelines, the `readFile()` function will efficiently read and process book data from a file, facilitating better data management in your programs.

Here's an example how the readFile() function can be written in C++ based on your requirements:

readFile() This function should accept the filestream opened in main. The filestream should then be used to loop through the file, inserting each book's information into a book that is then inserted into an array of books. You will likely want to use getline() and string type casting (stoi, stof) here, as cin will stop reading at whitespace. Return the number of lines read from the file. This function should *not* open the filestream.

readFile() This function should accept the filestream opened in main. The filestream should then be used to loop through the file, inserting each book's information into a book that is then inserted into an array of books. You will likely want to use getline() and string type casting (stoi, stof) here, as cin will stop reading at whitespace. Return the number of lines read from the file. This function should not open the filestream.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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