fseek

Parameters

stream

Pointer to a FILE object that identifies the stream.

offset

Binary files: Number of bytes to offset from origin.
Text files: Either zero, or a value returned by ftell.

origin

Position used as reference for the offset. It is specified by one of the following constants defined in <cstdio> exclusively to be used as arguments for this function:

Constant	Reference position
SEEK_SET	Beginning of file
SEEK_CUR	Current position of the file pointer
SEEK_END	End of file *

* Library implementations are allowed to not meaningfully support SEEK_END (therefore, code using it has no real standard portability).

Return Value

Example

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/* fseek example */
#include <stdio.h>
int main ()
{
  FILE * pFile;
  pFile = fopen ( "example.txt" , "wb" );
  fputs ( "This is an apple." , pFile );
  fseek ( pFile , 9 , SEEK_SET );
  fputs ( " sam" , pFile );
  fclose ( pFile );
  return 0;
}

This is a sample.

See also

ftell

Get current position in stream (function)

fsetpos

Set position indicator of stream (function)

rewind

Set position of stream to the beginning (function)