going mad

Hello!
I try to use the stl::search function but i am not able to figure out the problem. I thing I know how to use this function because i have already used it sucessfully serveral times but now it doesn´t work.

Code:

---

#include <string>
#include <iostream>
#include <vector>
#include <algorithm>
#include <fstream>

using namespace std;

int main()
{
        vector<string> vec(1);
        vec[0] = "#include";

        ifstream ifs( __FILE__ );
        istream_iterator<string> is( ifs ), end;

        //copy( is, end, ostream_iterator<string>(cout, "\n" ) );
        istream_iterator<string> it = search( is, end, vec.begin(), vec.end() );

        cout << it->c_str();

    return 0;
}

---

The stl::copy function works fine and outputs me the whole file but the search function doesn´t work.
I tried to debug the function "search" and i saw that in the first loop the iterator "is" has a correct value but in the next loops the iterator "is" keeps always the value of a empty string.
Can somone help me ?

Thanks in advance

I found the error maybe.
The istream_iterator is a input_iterator_tag and the function search uses the function _Distance (for-loop) to count the number of element inside the container. So the function _Distance puts the iterator (the filepointer) at the end of the file. Is this rigth???