File Processing

File Operations

In C, you can perform four major operations on the file, either text or binary:

1. Creating a new file
2. Opening an existing file
3. Closing a file
4. Reading from and writing information to a file

•File Definition

–File is a collection of record

–Record is a collection of field

–Field is a block of byte

–Byte is collection of bit

•Possible mode value :

    Mode        Description

  “r”  opening a file to be read.

  “w”  creating a file to be written.

  “a”  opening a File for data append.

  “r+”  opening a File for read/write.

  “w+”  creating file for read/write.

  “a+”  opening a File for read/append

  “rb”    opening a File (binary) to be read.

  “wb”  creating a file (binary) for write operation.

•Closing a File using fcloseall():

    

  int fcloseall (void);

üClose all active stream except: stdin, stdout, stdprn, stderr, and stdaux.

üWill return the number of stream closed if successful, and return EOF instead.

üHeader file <stdio.h>

SOURCE : BINUS MAYA PPT AND PROGRAMIZ