Creating a file that doesn't exist

[AJ]

Hello, I was wondering if it is possible to create a file if it doean't
exist. I am using fstream and writing in and out a binary file. I check to
see if the file is opened. if it doesn't get opened, i want to create the
file. I was wondering if this can be done. This is the code i have for
opening the file:

fstream rfile("names.db", ios::binary| ios::in | ios:ut);
if ( !rfile ) {
cerr << "Could not open file 'names.db'\n";
}

I am hoping to put the creating of the file after the cerr. i hope someone
can help me out with this. thanks.

AJ

 

[Jakob Olsen]

Instead of rfile, don't you need to use: open??
I'm a newbie, so correct me if i'm wrong...
Jakob

 

[Thomas Matthews]

Instead of rfile, don't you need to use: open??
I'm a newbie, so correct me if i'm wrong...
Jakob

Jakob:
Don't top-post. Replies are either interspersed or
appended at the bottom, like this one.

The OP is using the one of the fstream constructors. This
is perfectly legal.


OP:
Please note that if an open fails, there may be an operating
system issue that won't permit another file being created.
Try clearing the stream errors (fstream::clear()) and trying
to use the open() method. I'm guaranteeing that this will
work, since there is no guarantee after the constructor fails.


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Thomas Matthews

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[Chris Mantoulidis]

Instead of rfile, don't you need to use: open??
I'm a newbie, so correct me if i'm wrong...
Jakob

He can do both

Well at least with ofstream, if you open a file that doesn't exist it
is automatically created... So I guess that is that same for its
parent class (fstream).