Chapter 7.2, Problem 12STQ

Explanation of Solution

Error in method definition “copyArray”:

• • The given method definition “copyArray” does not return an each element from the given argument array “anArray”.
  • ○ Relatively, it returns a reference to the array it is given.
• • To produce a duplicate array, user would modify the statement “temp = anArray” to following statement.

  for(int index = 0; index < anArray.length; index++)

      temp[i] = anArray[i];

  • ○ The above statement is used to returns the each element in the array “temp” using “for” loop.

Modified method definition of “copyArray”:

public static int[] copyArray(int[] anArray)

{

    //Declare an array "temp"

    int[] temp = new int[anArray.length];

/* Copy values of "anArray" to "temp" array using "for" loop */

    for(int index = 0; index < anArray.length; index++)

        //Store value of "anArray" to "temp" array

        temp[index] = anArray[index];

    //Display statement

    System.out.println("Values in 'temp' array");

    //Display the values in "temp" array

    for(int index = 0; index < anArray.length; index++)

        System.out.println(temp[index]);

    //Return the values in "temp" array

    return temp;

}

Explanation:

The above method definition is used to copy the array to another array variable.

• • Declare an array “temp”.
• • Copy the value of “anArray” to “temp” array using “for” loop.
• • Display the values in values of “temp” array using “for” loop.

Complete executable code:

The complete executable code for “copyArray” is given below:

//Import required package

import java.util.Scanner;

//Define "Main" class

class Main

{

    //Define main function

    public static void main(String[] args)

    {

        //Create an array "arr"

        int[] arr = new int[5];

        //Create scanner object

        Scanner input = new Scanner(System...