Re: ifstream open function fails

Hi,I have this code:

#include "stdafx.h"
#include "fstream"
#include "iostream"

using namespace std;

int main()
{
    char fileName[80];
    char buffer[255];
    cout << "Please re-enter the file name: ";
    cin >> fileName;

    ifstream fin(fileName);
    if (fin) // already exists?
    {
        //read file content...
    }
    fin.close();

    ofstream fout(fileName,ios::app);
    if (!fout)
    {
        cout << "Unable to open " << fileName << " for appending.\n";
        system("PAUSE");
        return(1);
    }

    // code that writes to files
    fout.close();

    fin.open(fileName); // reassign existing fin object!

        // here are my proofs with different functions: you can't see
that they're not all FALSE
    // fin.fail() TRUE
    // fin.bad() FALSE
    // fin.eof() TRUE
    // can't open file anynmore!!
    if (!fin)
    {
        cout << "Unable to open " << fileName << " for reading.\n";
        system("PAUSE");
        return(1);
    }
    cout << "\nHere's the contents of the file:\n";
    char ch;
    // some code...
}

Why can't it open fileName again with fin.open? Do I have to recreate
ifstream object as ifstream fin(fileName)?
Thanks