C Programming: Opening Files in Read Mode

This line of code opens a file named 'book_storage.txt' in read mode and assigns the file pointer to the variable 'file'.

FILE *file = fopen('book_storage.txt', 'r');

The fopen() function takes two arguments: the filename and the mode. In this case, 'r' indicates read mode, allowing you to access the file's contents for reading. The function returns a file pointer, which is a special type of pointer that points to the beginning of the file. This pointer is then assigned to the variable 'file', allowing you to use it to interact with the file.