#include<iostream>
#include<fstream>
#include<string>

using namespace std;

bool fileExists(string fileName);

void main()
{

	string fileName;
	
	cout << "file name? ";
	getline(cin,fileName);

	//only open the file for output if it does NOT exist
	while(fileExists(fileName))
	{
		cout << fileName << " already exists " << endl;
		cout << "file name? ";
		getline(cin,fileName);
	}

	//use the fileName
}

bool fileExists(string fileName)
{
	bool result = true;
	ifstream fileChecker(fileName.c_str());
	if(fileChecker.fail())
	{
		//the only reason for fileChecker to have failed is that it
		//did not exist
		result = false;
	}
	fileChecker.close();
	return result;
}