Chapter 6, Problem 10PE

a.

Explanation of Solution

Program:

File name: “RetirementGoal.java”

//Import necessary header files

import java.util.Scanner;

//Define a class named RetirementGoal

public class RetirementGoal

{

    //Define main method

    public static void main (String[] args)

    {

        //Create an object for the Scanner class

        Scanner input = new Scanner(System.in);

        //Declare the variables

        int years;

        int saveAmount;

        int total;

        /*Prompt the user to enter the number of years the user

        has until retirement */

System.out.print("How many years until retirement? >> ");

        years = input.nextInt();

/*While condition if the user enters 0 or a negative number*/

        while(years <= 0)

        {

            //Print the error message

            System.out.println("Years cannot be 0 or negative");

            //Reprompt the user to make a valid entry

            System...

b.

Explanation of Solution

Program:

File name: “RetirementGoal2.java”

//Import necessary header files

import java.util.Scanner;

//Define a class named RetirementGoal2

public class RetirementGoal2

{

    //Define main method

    public static void main (String[] args)

    {

        //Create an object for the Scanner class

        Scanner input = new Scanner(System.in);

        //Declare the variables

        int years;

        int saveAmount;

        int total;

        final double RATE = 0.04;

        /*Prompt the user to enter the number of years the user

        has until retirement */

        System.out.print("How many years until retirement? >> ");

        years = input.nextInt();

        /*While condition if the user enters 0 or a negative number*/

        while(years <= 0)

        {

            //Print the error message

            System.out.println("Years cannot be 0 or negative");

            //Reprompt the user to make a valid entry

            System.out.print("Please renter years >> ");

            years = input.nextInt();

        } 

/*Prompt the user to enter the amount of money the user can save annually*/

        System.out.print("How much can you save annually? >> ");

        saveAmount = input.nextInt();

/*While condition if the user enters 0 or a negative number*/

        while(saveAmount <= 0)

        {

            //Print the error message

            System...