This chapter discusses file processing in C programming. It introduces file input/output (I/O) operations, including declaring FILE variables, opening and closing files, reading from and writing to files, and checking for end of file. The key steps are to declare a FILE pointer variable, use fopen() to open a file, perform file I/O operations like fprintf() and fscanf(), and close the file using fclose(). File opening is verified by checking if fopen() returns NULL. End of file is detected using the feof() function.

1. Chapter 8 FILE PROCCESSING 8.1 Introduction 8.2 Introduction to File I/O 8.2.1 declaring FILE variables 8.2.2 opening a Disk Files for I/O file open verification 8.2.3 reading and writing to Disk File 8.2.4 closing a Disk Files 8.2.5 EOF

10. 8.2.2 Opening a File (cont..) Table: 8.1 Filename and mode Read & write, but append instead of overwrite “ a+” Open file to write, but append instead of overwrite “ a” Read & Write, do not destroy file if it exists “ r+” Open file to read “ r” Read & write, but overwrite file if it exists “ w+” Open file to write (create a file) “ w” description Mode