fseek(), SEEK_SET, SEEK_CUR, SEEK_END functions in C

Prev     Next

fseek() functions is file handling functions in C programming language. It has following constants. SEEK_SET, SEEK_CUR, SEEK_END. Please find below the description and syntax for each above file handling functions.

File operation
Declaration & Description
fseek() Declaration: int fseek(FILE *fp, long int offset, int whence)

fseek() function is used to move file pointer position to the given location.

where,
fp – file pointer
offset – Number of bytes/characters to be offset/moved from whence/the current file pointer position
whence – This is the current file pointer position from where offset is added. Below 3 constants are used to specify this.

SEEK_SET SEEK_SET – It moves file pointer position to the beginning of the file.
SEEK_CUR SEEK_CUR – It moves file pointer position to given location.
SEEK_END SEEK_END – It moves file pointer position to the end of file.

Example program for fseek(), seek_set(), seek_cur(), seek_end() functions in C:

Assume that test.c file is loaded with following data. “Fresh2refresh.com is a programming tutorial website”. Let’s see how to move file pointer to different locations inside a file in below C program.

Output:

Before fseek – Fresh2refresh.com is a programming tutorial website
After SEEK_SET to 21 – a programming tutorial website
After SEEK_CUR to -10 – sh.com is a programming tutorial website
After SEEK_END to -7 – website

Other Inbuilt file handling functions in C programming language:

C programming language offers many other inbuilt functions for handling files. They are given below. Please click on each function name below to know more details, example programs, output for the respective file handling function.

File handling functions
Description
fopen () fopen () function creates a new file or opens an existing file.
fclose () fclose () function closes an opened file.
getw () getw () function reads an integer from file.
putw () putw () functions writes an integer to file.
fgetc () fgetc () function reads a character from file.
fputc () fputc () functions write a character to file.
gets () gets () function reads line from keyboard.
puts () puts () function writes line to o/p screen.
fgets () fgets () function reads string from a file, one line at a time.
fputs () fputs () function writes string to a file.
feof () feof () function finds end of file.
fgetchar () fgetchar () function reads a character from keyboard.
fprintf () fprintf () function writes formatted data to a file.
fscanf () fscanf () function reads formatted data from a file.
fputchar () fputchar () function writes a character onto the output screen from keyboard input.
fseek () fseek () function moves file pointer position to given location.
SEEK_SET SEEK_SET moves file pointer position to the beginning of the file.
SEEK_CUR SEEK_CUR moves file pointer position to given location.
SEEK_END SEEK_END moves file pointer position to the end of file.
ftell () ftell () function gives current position of file pointer.
rewind () rewind () function moves file pointer position to the beginning of the file.
getc () getc () function reads character from file.
getch () getch () function reads character from keyboard.
getche () getche () function reads character from keyboard and echoes to o/p screen.
getchar () getchar () function reads character from keyboard.
putc () putc () function writes a character to file.
putchar () putchar () function writes a character to screen.
printf () printf () function writes formatted data to screen.
sprinf () sprinf () function writes formatted output to string.
scanf () scanf () function reads formatted data from keyboard.
sscanf () sscanf () function Reads formatted input from a string.
remove () remove () function deletes a file.
fflush () fflush () function flushes a file.

Prev     Next

1. Online Compilers - Compile & Run your C/C++ programs:

✅ Online Compilers

2. Ask your questions or clarify your/others doubts from,

✅ Online Discussion Forums by Fresh2Refresh.com





Share this website !!!
Facebook Twitter Linkedin

Close
We Support JALLIKATTU !!!
We Support JALLIKATTU!
By Fresh2Refresh.com
Show Your Support as well. Thanks!