Tax payment system

Question

hi!
I wondered if someone could help me, we are required to do this as part of an excercise for a course but I havn't got a clue where to start. The task is to:
Write a program that calculates how much tax someone should pay according to the following rules;
* People pay no tax if they earn up tp �4,000.
*They pay tax at the rate of 20% on the amount they earn over �4,000 but up to �20,000
*They pay tax at the rate of 25% on the amount they earn over �20,000 but up to �29,000
*They pay tax at the rate of 40% on the amount they earn over �29,000.
e.g. if someone earns �35,000 they will pay
0% on the first �4000
20% on the next �16000 = �3200
25% on the next �9000 = �2250
40% on the last �6000 = �2400
= �0 + �3200 + �2250 + �2400
= �7850
The program should then output the amount of tax to be paid.
I would be really greatful if someone could help me out of start me off.
thanks
Maria

Answer 1

Sorry - i am asking a bit much there. I have started this, the best I thought I could do was to add the code in a stage at a time. so far I have
import java.util.*;
//A Program to compare the ages of Tom and Jerry and output who is older
public class lecture10c
     public static void main (String[] args)
          //Set up data input and declare varibles
          Scanner data_input = new Scanner (System.in);
          String name;
          int amount_earned, tax_owed;
          //Get amount earned by person
          System.out.print ("Please enter the amount earned: ");
          amount_earned = data_input.nextInt ();
          //Determine if they should pay tax
          if (amount_earned <= 4000)
               System.out.printf ("%nNo tax is payable");
          //If they should pay tax
          else
               //Calculate tax to pay
               tax_owed = (amount_earned * 0.20);
               System.out.printf("Tax to be paid = %d%n", tax_owed);
}However, it won't compile and i get this error:
found : double
required: int
               tax_owed = (amount_earned * 0.20);
^
1 error
Anyone any ideas why I am getting that message?