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Java Write a program that reads a list of integers, and outputs those integers in reverse. The input begins with an integer indicating the number of integers that follow. For coding simplicity, follow each output integer by a space, including the last one. Assume that the list will always contain fewer than 20 integers. Ex: If the input is: 5 2 4 6 8 10 the output is: 10 8 6 4 2 To achieve the above, first read the integers into an array. Then output the array in reverse.

Respuesta :

ijeggs

Answer:

import java.util.Scanner;

public class num5 {

   public static void main(String[] args) {

       Scanner in = new Scanner(System.in);

       // Receiving the length of the array

       System.out.println("Enter the number of elements in the array");

       int num = in.nextInt();

       // Declaring the array

       int [] intArray = new int[num];

       int i;

       //Receiving Values into the array

       for(i=0; i<intArray.length; i++){

           System.out.println("Enter the values");

           intArray[i]= in.nextInt();

       }

       //Printing the Initial Array

       System.out.println("The original arrangement of the array");

       for(i=0; i<intArray.length; i++){

           System.out.print(intArray[i]+" ");

       }

       System.out.println();

       //Calling Method reverseArray

       System.out.println("The Reversed array is");

       reverseArray(intArray,num);

 }

   static void reverseArray(int a[], int n)

   {

       int[] reverseArray = new int[n];

       int j = n;

       for (int i = 0; i < n; i++) {

           reverseArray[j - 1] = a[i];

           j = j - 1;

       }

       for (int k = 0; k < n; k++) {

           System.out.print(reverseArray[k]+" ");

       }

   }

}

Explanation:

  • Use Scanner class to prompt user for a length for the array int num
  • Create an array of integers of size num
  • Use a for loop to continually ask user to enter values into this array.
  • Use another for loop to display the fully quantified array
  • Define a method reverseArray static void reverseArray(int a[], int n) That accepts two parameters the array and its length and reverses the position of the elements pf the array
  • Call the method with the main method

frknkrtrn

Answer:

import java.util.Scanner;

public class Main

{

public static void main(String[] args) {

    final int COUNT = 20;

    int[] values = new int[COUNT];

   

 Scanner input = new Scanner(System.in);

 System.out.print("Enter the numbers: ");

 

 for(int i=0; i<values.length; i++) {

     values[i] = input.nextInt();

 }

 

 for(int i=0; i<values.length/2; i++){

     int temp = values[i];

     values[i] = values[values.length - i -1];

     values[values.length - i -1] = temp;

 }

       for(int value:values) {

     System.out.print(value + " ");

 }

}

}

Explanation:

- Initialize a constant variable for the size of the array

- Initialize the array called values

- Ask the user for the numbers

- Put entered numbers into the array in the first for loop

- Swap the values in the second for loop

- Print the values in for each loop

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