File handling
File: the file is a permanent storage medium in which we can store the data permanently.
Types of file can be handled
we can handle three type of file as
(1) sequential file
(2) random access file
(3) binary file
File Operation
opening a file:
Before performing any type of operation, a file must be opened and for this fopen() function is used.
syntax:
file-pointer=fopen(“FILE NAME ”,”Mode of open”);
example:
FILE *fp=fopen(“ar.c”,”r”);
If fopen() unable to open a file than it will return NULL to the file pointer.
File-pointer: The file pointer is a pointer variable which can be store the address of a special file that means it is based upon the file pointer a file gets opened.
Declaration of a file pointer:-
FILE* var;
Modes of open
The file can be open in three different ways as
Read mode ’ r’/rt
Write mode ’w’/wt
Appened Mode ’a’/at
Reading a character from a file
getc() is used to read a character into a file
Syntax:
character_variable=getc(file_ptr);
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