public class Disk {
	private File outfile;
	private File infile;
	public PrintWriter out;
	public BufferedReader in;

	public Disk (String filename,String io){
		if(io.equals("out")){
			outfile = new File(filename);
			try{
				out = new PrintWriter(new FileWriter(outfile));
			}catch(Exception e1){
				System.out.println("Error in Constructor Call");
			}
		}
		if(io.equals("in")){
			infile = new File(filename);
			try{
				in = new BufferedReader(new FileReader(infile));
			}catch(FileNotFoundException e2) {
				System.out.println(filename + " not found");
			}
		}
	}

	public String readLine(){
		String line = null;
		try{
			line = in.readLine();
		}catch(java.io.IOException e){
			System.out.println("input line not valid");
		}
		return line;
	}
}