Java程序设计基础篇（第8版）第三章编程题答案

package excercise3_13; import java.util.Scanner; public class Code { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Scanner input = new Scanner(System.in); System.out.print( "(0-single filer, 1-married jointly,\n" + "2-married separately, 3-head of household)\n" + "Enter the filing status: "); int status = input.nextInt(); System.out.print("Enter the taxable income: "); double income = input.nextDouble(); double tax = 0; if (status == 0) { 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) { 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) { 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) { 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(0); } System.out.println("Tax is " + (int)(tax * 100) / 100.0); } }