/**
 * Title:        Chapter 3, "Control Statements"
 * Description:  Chapter 3 Examples
 * Copyright:    Copyright (c) 2000
 * Company:      Armstrong Atlantic State University
 * @author Y. Daniel Liang
 * @version 1.0
 */

// TestWhile.java: Test the while loop

public class TestWhile
{
  /**Main method*/
  public static void main(String[] args)
  {
    int data;
    int sum = 0;

    // Read an initial data
    System.out.println("Enter an int value");
    data = MyInput.readInt();

    // Keep reading data until the input is 0
    while (data != 0)
    {
      sum += data;

      System.out.println(
        "Enter an int value, the program exits if the input is 0");
      data = MyInput.readInt();
    }

    System.out.println("The sum is " + sum);
  }
}

// a class for reading various types from the keyboard (System.in) 
class MyInput
{
    public static String readString()
    {
        String string = "";
        java.io.BufferedReader bufferedReader = 
           new java.io.BufferedReader(new java.io.InputStreamReader(System.in));
        try
        {
            string = bufferedReader.readLine();
        }
        catch (java.io.IOException ex)
        {
            throw new RuntimeException(ex);
        }
        return string;
    }

    public static int readInt()
    {
        return Integer.parseInt(readString());
    }

    public static double readDouble()
    {
        return Double.parseDouble(readString());
    }

    // test all the methods of this class
    public static void main(String[] args)
    {
        System.out.println("Testing 'readString()'");
        System.out.print("Input your string : ");
        System.out.println("Your string was '" + readString() + "'");
        System.out.println("\nTesting 'readInt()'");
        System.out.print("Input your int : ");
        System.out.println("Your int was '" + readInt() + "'");
        System.out.println("\nTesting 'readDouble()'");
        System.out.print("Input your double : ");
        System.out.println("Your double was '" + readDouble() + "'");
    }
}