Re-opening closed files?

[Jsel]

Hi there, I'm having a problem re-opening files of type ifstream that I closed. for example...

ifstream file_in;
file_in.open("data.dat");
file_in.close("data.dat");
file_in.open("data.dat");

After this, the file does not open correctly - file_in.fail() returns true every time. Am I doing anything wrong?

I'm using the g++ compiler.

[liyarax]

ifstream file_in;
file_in.open("data.dat");
file_in.close("data.dat");
file_in.clear();
file_in.open("data.dat");

I think that should work

[Jsel]

I just found that on google.. I was just about to post it but oh well. But thank you, that fixed the problem. What does ifstream.clear() do anyways?

[liyarax]

resets it. anything you did before .clear has no effect; it's like recalling it.

[gcampton]

That's a question that can easily be answered by reading the API on this site:
type "ifstream" into search bar up top.

Jsel wrote:

What does ifstream.clear() do anyways?

http://cplusplus.com/reference/iostream/ifstream/