void searchCity()
{
	//declare variables
	String *zip = "";
	String *city ="";
	bool fileProblem = false;
	//declare CityZip object
	CityZip *cityObj = new CityZip;
	//declare StreamReader variable and open the file
	IO::StreamReader *inFile;
	try
	{
		inFile = IO::File::OpenText("city.txt");
	}
	catch (IO::IOException *ex)
	{
		fileProblem = true;
		Console::WriteLine(ex->Message);
	}

	if (fileProblem == false)
	{
		//read record
		Console::Write("Enter the zip: ");
		zip = Console::ReadLine();
		while (inFile->Peek() != -1)
		{
			cityObj->ReadRecordFromFile(inFile);
			zip = cityObj->GetCity();
		}	//end while

		//display result
		city =Convert::ToString(city->IndexOf(zip));
		Console::WriteLine("City: {0}", zip);

		//close the file
		inFile->Close();
	}	//end if
}	//end of searchCity function