/*
 * Copyright (c) 1995, 1996 Sun Microsystems, Inc. All Rights Reserved.
 *
 * Permission to use, copy, modify, and distribute this software
 * and its documentation for NON-COMMERCIAL purposes and without
 * fee is hereby granted provided that this copyright notice
 * appears in all copies. Please refer to the file "copyright.html"
 * for further important copyright and licensing information.
 *
 * SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
 * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
 * TO THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
 * PARTICULAR PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR
 * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
 * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES.
 */
import java.io.*;

class DataIOTest {
    public static void main(String args[]) {

	    // writing part
	try {
	    DataOutputStream dos = new DataOutputStream(new FileOutputStream("invoice1.txt"));

	    double prices[] = { 19.99, 9.99, 15.99, 3.99, 4.99 };
	    int units[] = { 12, 8, 13, 29, 50 };
	    String descs[] = { "Java T-shirt", "Java Mug", "Duke Juggling Dolls", "Java pin", "Java Key Chain" };
	
	    for (int i = 0; i < prices.length; i ++) {
	        dos.writeDouble(prices[i]);
	        dos.writeChar('\t');
	        dos.writeInt(units[i]);
	        dos.writeChar('\t');
	        dos.writeChars(descs[i]);
	        dos.writeChar('\n');
	    }
	    dos.close();
	} catch (IOException e) {
	    System.out.println("DataIOTest: " + e);
	}

	    // reading part
	try {
	    DataInputStream dis = new DataInputStream(new FileInputStream("invoice1.txt"));

	    double price;
	    int unit;
	    String desc;
	    boolean EOF = false;
	    double total = 0.0;

	    while (!EOF) {
	        try {
	            price = dis.readDouble();
	            dis.readChar();       // throws out the tab
	            unit = dis.readInt();
	            dis.readChar();       // throws out the tab
	            desc = dis.readLine();
		    System.out.println("You've ordered " + unit + " units of " + desc + " at $" + price);
		    total = total + unit * price;
	        } catch (EOFException e) {
		    EOF = true;
	        }
	    }
	    System.out.println("For a TOTAL of: $" + total);
	    dis.close();
	} catch (FileNotFoundException e) {
	    System.out.println("DataIOTest: " + e);
	} catch (IOException e) {
	    System.out.println("DataIOTest: " + e);
	}
    }
}