File Management in C Scheme

1. FILE MANAGEMENT
PROGRAMMING IN C
SUBMITTED BY,
MS. K. BANUPRIYA
ASSISTANT PROFESSOR OF INFORMATION TECHNOLOGY
BON SECOURS COLLEGE FOR WOMEN, THANJAVUR.

2. WHAT IS FILE?
A collection of data (or) Information stores in a system memory is
called file.
Eg: system memory (hard disk)

3. TYPES OF FILE
TEXT FILE
• .txt file
• Contents will be like
alphabets,digits & special
character
• Easily understand by human
being
• It provides less security
BINARY FILE
• .bin file
• Contents will be like(0’s&1’s)
• Easily understandable by
computer
• Its provide better security with
compared to text file

4. o When a program is terminated ; entrie data will be
lost; so, storing in a file will perserve your data even if
the program terminates
o You can easily move your data from one computer to
another computer without make.
Why file is required?

5.  Creating a new file
 Opening an existing file
 Reading from the file
 Writing to the file
 Deleting to the file
 Closing the file
File Operation in C

6. fopen() Open a newfile (or) existing file
fclose() Close the file
fprintf() Write the data into the file
fscanf() Read data from the file
fgetc() Reads a character from the file
fputs() Write a character into the file

7. Declaring & opening file
FILE * fptr; declaration of file
fptr= fopen (“Filename”,”Mode”);
r - open the file reading only
w - open the file for writing only
Type of mode of file in c:

8. Declaring of file
FILE * P1,*P2;
P1=fopen(“data”,”r”);
P2=fopen(“result”,”w”);

9. Fprintf() & fscanf() function
#include <stdio.h>
Void main()
{
FILE*f;
f= fopen(“f1.txt”,”w”);
Fprintf(f,”Welcome”);
Fclose(f);
}

10. Reading file fscanf() function
#include <stdio.h>
Void main()
{
FILE*f;
Char buff [255];
f=fopen(“f1.txt”,”r”);
While (fscanf (f,”%s”,buff)1=EOF)
{
Printf(“%s”,buff);
}
fclose(f);
}
Output:
Welcome

11. Program:
#include<stdio.h>
#include<conio.h>
Void main()
int age;
char name[20];
clrscr();
printf(“enter the name & age:”);
Scanf(“%sn”,&name);
Scanf(“%dn”,&age);
fp = fopen(“Demo.txt”,”w”);
fprintf(fp,”name:%sn age:%d”,name ,age);
fclose(fp);
getch();
}
Output:
Enter the name & age : Abi
23

12. TYPE OF FILE PROCESSING:
Data can be accessed in file there are 2 ways to access the
data in file.
Sequential Access file
Random Access file
SEQUENTIAL ACCESS FILE RANDOM ACCESS FILE
Data stored and retrieved in a
sequential manner
Data stored and retrieved in a random
manner
eg:
sample.txt
Apple
eg:
sample.bin
101101DAF11C
1111110000B

13. The functions are used for random access file processing:
fseek() – file seeking
ftell() – file position
rewind() – go to f
fseek() It is used for seeking the pointer
position the file at the sequential type
ftell()
 This function return the value of
the current pointer position
 The value is count from the
beginning of the file.
rewind()
This function is used to move the
file pointer to the beginning of the
given file

14. Thank You