// package chapter5;

/**
 * Title:        Chapter 5, "Arrays"
 * Description:  Examples for Chapter 2
 * Copyright:    Copyright (c) 2000
 * Company:      Armstrong Atlantic State University
 * @author Y. Daniel Liang
 * @version 1.0
 */
// TestPassArray.java: Demonstrate passing arrays to methods
public class TestPassArray
{
  /**Main method*/
  public static void main(String[] args)
  {
    int[] a = {1, 2};

    // Swap elements using the swap method
    System.out.println("Before invoking swap");
    System.out.println("array is {" + a[0] + ", " + a[1] + "}");
    swap(a[0], a[1]);
    System.out.println("After invoking swap");
    System.out.println("array is {" + a[0] + ", " + a[1] + "}");

    // Swap elements using the swapFirstTwoInArray method
    System.out.println("Before invoking swapFirstTwoInArray");
    System.out.println("array is {" + a[0] + ", " + a[1] + "}");
    swapFirstTwoInArray(a);
    System.out.println("After invoking swapFirstTwoInArray");
    System.out.println("array is {" + a[0] + ", " + a[1] + "}");
  }

  /**Swap the first two elements in the array*/
  public static void swapFirstTwoInArray(int[] array)
  {
    int temp = array[0];
    array[0] = array[1];
    array[1] = temp;
  }

  public static void swap(int n1, int n2)
  {
    int temp = n1;
    n1 = n2;
    n2 = temp;
  }
}