Chapter 3 Exercise 13, Introduction to Java Programming, Tenth Edition Y. Daniel LiangY.

*3.13 (Financial application: compute taxes) Listing 3.5, ComputeTax.java, gives the source code to compute taxes for single filers. Complete Listing 3.5 to compute the taxes for all filing statuses.

import java.util.Scanner;
 
public class ProgrammingEx3_13 {
 public static void main(String[] args) {
  // Create a Scanner
  Scanner input = new Scanner(System.in);
 
  // Prompt the user to enter filing status
  System.out
    .print("(0-single filer, 1-married jointly or qualifying widow(er), "
      + "\n2-married separately, 3-head of household)\n"
      + "Enter the filing status: ");
  int status = input.nextInt();
 
  // Prompt the user to enter taxable income
  System.out.print("Enter the taxable income: ");
  double income = input.nextDouble();
 
  // Compute tax
  double tax = 0;
 
  if (status == 0) { // Compute tax for single filers
   if (income <= 8350)
    tax = income * 0.10;
   else if (income <= 33950)
    tax = 8350 * 0.10 + (income - 8350) * 0.15;
   else if (income <= 82250)
    tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + (income - 33950)
      * 0.25;
   else if (income <= 171550)
    tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + (82250 - 33950)
      * 0.25 + (income - 82250) * 0.28;
   else if (income <= 372950)
    tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + (82250 - 33950)
      * 0.25 + (171550 - 82250) * 0.28 + (income - 171550)
      * 0.33;
   else
    tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + (82250 - 33950)
      * 0.25 + (171550 - 82250) * 0.28 + (372950 - 171550)
      * 0.33 + (income - 372950) * 0.35;
  } else if (status == 1) { // Compute tax for married file jointly
   if (income <= 16700)
    tax = income * 0.10;
   else if (income <= 67900)
    tax = 16700 * 0.10 + (income - 16700) * 0.15;
   else if (income <= 137050)
    tax = 16700 * 0.10 + (67900 - 16700) * 0.15 + (income - 67900)
      * 0.25;
   else if (income <= 208850)
    tax = 16700 * 0.10 + (67900 - 16700) * 0.15 + (137050 - 67900)
      * 0.25 + (income - 137050) * 0.28;
   else if (income <= 372950)
    tax = 16700 * 0.10 + (67900 - 16700) * 0.15 + (137050 - 67900)
      * 0.25 + (208850 - 137050) * 0.28 + (income - 208850)
      * 0.33;
   else
    tax = 16700 * 0.10 + (67900 - 16700) * 0.15 + (137050 - 67900)
      * 0.25 + (208850 - 137050) * 0.28 + (372950 - 208850)
      * 0.33 + (income - 372950) * 0.35;
  } else if (status == 2) { // Compute tax for married separately
   if (income <= 8350)
    tax = income * 0.10;
   else if (income <= 33950)
    tax = 8350 * 0.10 + (income - 8350) * 0.15;
   else if (income <= 68525)
    tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + (income - 33950)
      * 0.25;
   else if (income <= 104425)
    tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + (68525 - 33950)
      * 0.25 + (income - 68525) * 0.28;
   else if (income <= 186475)
    tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + (68525 - 33950)
      * 0.25 + (104425 - 68525) * 0.28 + (income - 104425)
      * 0.33;
   else
    tax = 8350 * 0.10 + (33950 - 8350) * 0.15 + (68525 - 33950)
      * 0.25 + (104425 - 68525) * 0.28 + (186475 - 104425)
      * 0.33 + (income - 186475) * 0.35;
  } else if (status == 3) { // Compute tax for head of household
   if (income <= 11950)
    tax = income * 0.10;
   else if (income <= 45500)
    tax = 11950 * 0.10 + (income - 11950) * 0.15;
   else if (income <= 117450)
    tax = 11950 * 0.10 + (45500 - 11950) * 0.15 + (income - 45500)
      * 0.25;
   else if (income <= 190200)
    tax = 11950 * 0.10 + (45500 - 11950) * 0.15 + (117450 - 45500)
      * 0.25 + (income - 117450) * 0.28;
   else if (income <= 372950)
    tax = 11950 * 0.10 + (45500 - 11950) * 0.15 + (117450 - 45500)
      * 0.25 + (190200 - 117450) * 0.28 + (income - 190200)
      * 0.33;
   else
    tax = 11950 * 0.10 + (45500 - 11950) * 0.15 + (117450 - 45500)
      * 0.25 + (190200 - 117450) * 0.28 + (372950 - 190200)
      * 0.33 + (income - 372950) * 0.35;
  } else {
   System.out.println("Error: invalid status");
   System.exit(1);
  }
 
  // Display the result
  System.out.println("Tax is " + (int) (tax * 100) / 100.0);
 }
}