Resetting a ifstream object after reading the whole file

Hi,

I am reading a simple text file as following:

Code:

---

    ifstream infile("doc.kml");
    string line;

    while (infile >> line) {
........
........
.......
......
........
  }

---

So, after reading past the complete file; I now want to reset the ifstream object (here infile). So, that I can again start reading the file from the first line in the next part of the code. Can somebody please tell me how to do this?

I know, I could just close the file and open it back again, but isn't there some more straightforward method for this?

Thanks a lot in advance.

Reset infile's get pointer to the origin of the stream with seekg(). I'm fairly certain the origin is zero, but look up seekg() in a C++ reference of some sort to be sure. It ought to tell you what to do.

Thanks...what you say is also mentioned in the Reference...still Dev-C++ doesn't seem to do anything with this command!

Anyways, thanks. I'll try this with some other compiler in university tomorrow.

You might also need to clear() the eof state.

However, wouldn't it be possible to store the contents of the file in memory, rather than reading it many times over?

You're in luck I just recently had to solve the same darn problem myself. Here's what seemed to work for me:
gfile is of type ifstream

Code:

---

                cerr << "Warning end of " << ifile << " reached" << endl ;
                gfile.clear() ;
                gfile.seekg(0, ios::beg) ;

---

Thanks a lot SevenThunders and anon.

It works now.