File Handling
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The process of accessing a
file from memory is known as file
handling.
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File handling is also known
as File Input/Output(I/O).
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File handling process
includes following operations.
1. Naming a file.
2. Opening a file
3. Reading data from a file.
4. Writing data a file.
5. Closing a file.
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To access any file need to
declare a pointer to FILE structure and then associate it with the particular
file. This pointer is referred as a file pointer and declared as follow:
FILE *ptr_var_name;
File Structure
To store data in a
file in the secondary memory , need to specify certain things about the file ,
to the operating system. They include :
1.
File name
2.
Data structure
3.
Purpose
Here,
File
name is a string of characters
that make up a valid filename for the operating system. It contains two parts ,
a primary name and an optional period with extension
Ex, xyz.txt
Digit.c
Name
Data
structure of a file is defined as
FILE in the library of standard I/O function definitions. Therefore , all files
should be declared as type FILE before they are used . FILE is a defined data
type.
Purpose
specifies that for which use file is opening , such as for reading, writing ,
appending etc .
Posted By : Ruchita Pandya
