File stream with repeating input

Question

I'm attempting to create a repeating menu that will allow a user to re-enter a file name if the program is unable to open the file.

Right now it works correctly if I enter the name of an existing file, but if the file doesn't exist it prints the "File not found" then executes the rest of the program. I'm new to file streams and most of the code here was found through references. I'm a bit lost on what exactly is going on and what the best way to handle the situation is. Any guidance would be appreciated.

typedef istream_iterator<char> istream_iterator;    

string fileName;

ifstream file;

do {        
    cout << "Please enter the name of the input file:" << endl;
    cin >> fileName;

    ifstream file(fileName.c_str());

    if (!file) {
        cout << "File not found" << endl;
    }

} while (!file);

std::copy(istream_iterator(file), istream_iterator(), back_inserter(codeInput));

Answer 1

After constructing the object file will always exist, so your loop condition always fails. Change the condition to whether the file didn't open properly.

do {
...
}
while (!file.is_open())