// This program illustrates the use of eof controlled while loop.  It shows 2 ways you
// can read information from a file with reading stopping when the end of the file is
// encountered.  Formally the first while loop will stop when eof is reached or an 
// incorrect data type is encountered.

#include <iostream>
#include <fstream>
using namespace std;

int main()
{
	char ch, filename[40];
	ifstream fin;

	cout << "Please enter your input file name" << endl;
	cin >> filename;
	fin.open(filename);
	if(!fin)  // didn't open file
	{
		cout << " Unable to open input file" << endl;
		return 1;	
	}

	while (fin >> ch)  // as long as there is a character to read from the file
		cout << " the character read from the file: " << ch << endl;
	//okay, now let's try this again using eof()

	cout<< endl << endl << " Now using eof test " << endl;
	fin.close();
	fin.clear();
	fin.open(filename);

	fin >> ch;
	while (!fin.eof())
	{
		cout << " ch is: " << ch << endl;
		fin >> ch;
	}

	fin.close();

	return 0;

}