Here filename is the name of the file to be opened and mode specifies the
purpose of opening the file. Mode can be of following types,

*fp is the FILE pointer (FILE 0), which will hold the reference to the opened(or
created) file.

mode descriptionr opens a text
file in reading mode

Ww opens or create a

text file in writing mode. a

opens a text file in append

mode

mode 84 opens a text file in both reading
and writing mode rb opens

a binary file in reading mode

wb opens or create a binary

file in writing mode ab opens

a binary file in append mode

rb+ opens a binary file in both reading
and writing mode wb+ opens a binary
file in both reading and writing mode
ab+ opens a binary file in both reading
and writing mode

Closing a File
The fclose() function is used to close an already opened file.
General Syntax :

int felose( FILE *fp );

Here fclose() function closes the file and returns zero on success, or EOF if
there is an error in closing the file. This EOF is a constant defined in the
header file stdio.h.

Input/Output operation on File

In the above table we have discussed about various file I/O functions to perform
reading and writing on file. getc() and putc() are simplest functions used
to read and write individual characters to a file.

#include

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