Filestreams (multiples)

[Lordieth]

This one has been bugging me for some time, so i'd appreciate it if anyone could help.

Right, when I declare my stream like so:

fout.open("Log.txt");

and use the stream as you normally would, everything is fine - but the problem is, I want to create another one, for a different file in the same program - how do I go about doing that? I tried changing it from fout to something else when creating a new txt file, and got this:

'fout2' undeclared (first use this function)

and obviously, just trying to re-open a different file with the same stream, doesn't seem to work, unless i'm missing something? this is probably something really simple i'm missing, but i've never had it explained it to me, in books, tutorials, or otherwise, so I would really appreciate it!

[gitter1226]

You can have as many files open as you want, within reason of course. They don't need to be named fout or anything similar to that, it is just a convention. If you want to have two open filestreams just do this :

ofstream f1out, f2out;
f1out.open("Log.txt");
f2out.open("Another.txt");

You can use those two file streams as normal.
If this is not working can I see all your code?

HTH,
Jeff

[Valmont]

You can use the same stream OBJECT as well. Just don't forget to close the object before loading a new file:

#include <iostream>
#include <fstream>

int main()
{
  std::ofstream fout("file_one.txt", std::ios::app);
  fout << "modified" << std::endl;
  
  //Close first!
  fout.close();
  
  fout.open("file_two.txt", std::ios::app);
  fout << "modified" << std::endl;
  return 0;
}

[Lordieth]

Originally Posted by gitter1226

You can have as many files open as you want, within reason of course. They don't need to be named fout or anything similar to that, it is just a convention. If you want to have two open filestreams just do this :

ofstream f1out, f2out;
f1out.open("Log.txt");
f2out.open("Another.txt");

You can use those two file streams as normal.
If this is not working can I see all your code?

HTH,
Jeff

Heh, I was declaring ofstream twice, and for some reason it doesn't like that - see, I knew it'd be something simple - thanks

and thankyou aswell Valmont, that'll come in handy