ftell

Returns the offset of the current byte relative to the beginning of a file.

Syntax

• p = ftell(fid)

Input argument

• fid - a file descriptor

Output argument

• p - an integer value: position of the file pointer as the number of characters from the beginning of the file.

Description

ftell returns the offset of the current byte relative to the beginning of the file associated with the named stream fid.

Example

TXT = 'example about ftell.';
fileID = fopen([tempdir(), 'ftell.txt'],'wt');
fprintf(fileID, TXT);
p1 = ftell(fileID)
fseek(fileID, SEEK_CUR, 'bof');
p2 = ftell(fileID)
status = fclose(fileID);

See also

fopen, fprintf, fclose, fseek.

History

Author

Allan CORNET