Delete chars in a file stream

[Bernie]

Hi

How can I remove/delete the last n characters from a fstream object?

Thanks
Bernie

 

[James Kanze]

How can I remove/delete the last n characters from a fstream object?

You can't.

First of all, of course, an fstream doesn't contain any
characters; it is only an interface to an external file which
contains the characters. But there's no standard way of
truncating a file, either (and some OS's don't support it at
all). The usual solution is to copy the file to a new file,
without copying what shouldn't be copied. There will often be
an OS specific means of truncating the file as well, but you
can't use it on an fstream; you'll have to check with your OS
documentation for more information there.