opening files in a loop

[Alan]

I have a program that looks for particular types of files and, for
each one (in a "for" loop), extracts their filename for processing,
like this:

if (nfiles > 0)
{
for (int i = 0; i < nfiles; i++)
{
string fullname = FindFile::combinePath(
find.filelist[i].path,
find.filelist[i].fileinfo.cFileName);
// open file
// Do some processing
// close file
}
}

My problem is how to open each file. To open a single file I use
something like:

ifstream infile (fullname);

but I cannot reuse infile over and over.

Can you help? This runs under Windows. Thanks, Alan

[Larry I Smith]

Alan wrote:

I have a program that looks for particular types of files and, for
each one (in a "for" loop), extracts their filename for processing,
like this:

if (nfiles > 0)
{
for (int i = 0; i < nfiles; i++)
{
string fullname = FindFile::combinePath(
find.filelist[i].path,
find.filelist[i].fileinfo.cFileName);
// open file
// Do some processing
// close file
}
}

My problem is how to open each file. To open a single file I use
something like:

ifstream infile (fullname);

but I cannot reuse infile over and over.

Can you help? This runs under Windows. Thanks, Alan

I've never had to reuse an fstream, but I'm thinking something
like this?:

ifstream infile;

// some loop that gets first/next file name somehow
// into current_fullname...
{
// derive current_fullname...
// open current file
infile.open(current_fullname);
// process file...
infile.close();
infile.clear();
}

Larry

[Ron Natalie]

Larry I Smith wrote:
me...

// open current file
infile.open(current_fullname);
// process file...
infile.close();
infile.clear();

This will work, but of course there is no reason to reuse
the stream in the example given. Each trip through
the block of the loop gets it's own copy of infile.

[Larry I Smith]

Ron Natalie wrote:

Larry I Smith wrote:
me...

// open current file
infile.open(current_fullname);
// process file...
infile.close();
infile.clear();

This will work, but of course there is no reason to reuse
the stream in the example given. Each trip through
the block of the loop gets it's own copy of infile.

Duh, you're correct. I didn't see the forest for the
trees...

Larry