Question

The files provided in the code editor to the right contain syntax and/or logic errors. In each case, determine and fix the problem, remove all syntax and coding errors, and run the program to ensure it works properly.

// Prompt user for value to start
// Value must be between 1 and 20 inclusive
// At command line, count down to blastoff
// With a brief pause between each displayed value
import java.util.*;
public class DebugSix3
{
public static void main(String[] args)
{
Scanner input = new Scanner(System.in);
String userNumString;
int userNum, val;
final int MIN = 1;
final int MAX = 20;
System.out.println("Enter a number between " + MIN + " and " + MAX + " inclusive");
userNumString = input.next();
userNum = Integer.parseInt(userNumString);
while(userNum < MIN || userNum > MAX)
{
System.out.println("Number out of range" +
"\nEnter a number between " + MIN + " and " + MAX + " inclusive");
userNumString = input.next();
userNum = Integer.parseInt(userNumString);
}
for(val = userNum; val >= 0; --val)
{
System.out.print(val + " ");
for(int x = 0; x < 100000; ++x)
for(int y = 0; y < 10000; ++y);
// Adjust these numbers for faster or slower performance
}
System.out.println("Blastoff!");
}
}

Answer 1

// Prompt user for value to start

// Value must be between 1 and 20 inclusive

// At command line, count down to blastoff

// With a brief pause between each displayed value

import java.util.*;

public class DebugSix3

{

    public static void main(String[] args)

    {

        Scanner input = new Scanner(System.in);

        String userNumString;

        int userNum, val;

        final int MIN = 1;

        final int MAX = 20;

        System.out.println("Enter a number between " + MIN + " and " + MAX + " inclusive");

        userNumString = input.next();

        userNum = Integer.parseInt(userNumString);

       

        while(userNum < MIN || userNum > MAX)

        {

            System.out.println("Number out of range" +

            "\nEnter a number between " + MIN + " and " + MAX + " inclusive");

            userNumString = input.next();

            userNum = Integer.parseInt(userNumString);

        }

        for(val = userNum; val >= 0; --val)

        {

            System.out.print(val + " ");

            try{

                // sleep for 1 second

                Thread.sleep(1000);

            }

            catch(InterruptedException e){

                e.printStackTrace();

            }

            // Adjust these numbers for faster or slower performance

        }

        System.out.println("\nBlastoff!");

    }

}

Sample Output