My assignment is to debug this code, I have submitted code multiple times and cannot get it right. Can you please explain to me what exactly is wrong with this code and how I can fix it?

Question

import java.util.*;

public class DebugTwo4

{

public static void main(String[] args)

{

Scanner input = new Scanner(System.in);

string costString;

double cost;

final TAX = 0.06;

System.out.println("Enter price of item you are buying");

costString = input.next();

cost = Double.parsedouble(coststring);

System.out.println("With " + TAX * 100 +

"% tax, purchase is $" + cost + cost * TAX);

}

}

Answer 1

First I changed the class name to SalesTax

just to make myself for comfortable.

COMPILER ERRORS:

(1)

The sales tax constant MUST be declared inside

the class, not in main() as

public static final double TAX = 0.06;

As a result, it must be referenced as this.TAX if you're in the class

or SalesTax.TAX if you're outside the class

(2) String data type begins with a Captial letter S...

String costString;

(3) cost = Double.parsedouble(coststring); <-- declared as costString,

so you got to STICK WITH IT!!!! I recommend camelCase notation

(4) Double.parseDouble(costString)

(5) THe algebraic expression must be inside parenthesis

so the compiler knows take the resulting value

and convert it to string...

You had cost + cost * TAX =

cost * (1 + TAX) <-- DISTRIBUTIVE PROPERTY FROM ALGEBRA IN ACTION!!!

how about that?!?!???!!

System.out.println("With " + TAX * 100 +

"% tax, purchase is $" + (cost*(1 + SalesTax.TAX)));

At this point I was able to get the code into a compile-able state.

It did work, as I input 20 and got the correct result of 21.20

you may want to round the result to and output only 2 digits so

that you don't see all the garbage in the memory buffer

here's the finished product:

================================================================

import java.util.*;

public class SalesTax

{

public static final double TAX = 0.06;

public static void main(String[] args)

{

Scanner input = new Scanner(System.in);

String costString;

double cost;

System.out.println("Enter price of item you are buying");

costString = input.next();

cost = Double.parseDouble(costString);

System.out.println("With " + TAX * 100 +

"% tax, purchase is $" + (cost*(1 + SalesTax.TAX)));

}

}