ofstream overwrite

[Bernhard Hidding]

Hello,
my program writes an array into a file using the following code:

ofstream arrayfile;
arrayfile.open("array_file.dat");
....
arraydatei.close();

This works as long as the file does not exist before I run the program. If
the file already exists the program does not overwrite it with new data, but
does nothing. I am using g++ on SuSE 9.1. It seems that the default on my
system is NOT to overwrite an existing file. How do I specifiy that an
existing file should be overwritten? Probably by using the ios_base:: flag
in a proper way?
Thanks in advance,
Bernhard Hidding

 

[Severin Ecker]

hi!

ofstream arrayfile;
arrayfile.open("array_file.dat");
...
arraydatei.close();

hmm,.. mothertongue bites back ;]
this should be arrayfile;

Probably by using the ios_base:: flag in a proper way?

try using ios_base::trunc explicitly when opening,.. though this should be
used by default anyway as far as i know...
are you sure, you have the correct rights on the file for truncating it?

regards,
sev