What is fseek() function ?

• It is used to sets the position to a desired point in the file.

Ex:

        fseek (file_pointer, offset, position);

• File pointer is the pointer to the file concerned.
• Offset is a number or variable of type long.
• Position is an integer number.
• Position can take 0 (zero) for beginning of file.
• Position can take 1 (one) for current position of file.
• Position can take 2 (two) for ending of file.

fseek() operations

Operation	Meaning
fseek(fp, 0L, 0);	Go to beginning
fseek(fp, 0L, 1);	Stay at the current position
fseek(fp, 0L, 2);	Go to end of the file
fseek(fp, m, 0);	Move to m+1 byte in the file
fseek(fp, m, 1);	Go forward by m bytes
fseek(fp, -m, 1);	Go backward by m bytes
fseek(fp, -m, 2);	Go backward by m bytes from the end.