Check to see if a file exists

[Czar24]

Hey all, I'm writing a program which saves the output to a single file like "output.txt"

I've been playing with the ios::nocreate and ios::noreplace but I can't get it to quite do what I want it to do (and yes I've included the #include <iostream> to activate them.

What I'm trying to do is this:

I want the program to save a given output as "output.txt"
If on subsequent runs, when the file is created again I want it to call the file "output1.txt" or "output2.txt" or whatever so that it never overwrites a previous output.

I've done something like this using a NAWK script with a simple for loop and a function while would return a 0 or 1 for the state if a given file exists, but I need this one to be in the executable and I haven't found the function.

Can anyone point me in the right direction?


Thanks!



Czar24

 

[Salem]

You could use pretty much the same idea.
Open the file for reading (doesn't destroy files, and doesn't create them). If the open succeeds, close it and try the next file in the sequence.

When you find a filename you can't open for reading, open it for writing.

--