Java IRS计税/if Else语句/结婚或单身

Question

我的任务是创建一个小型的美国国税局临时税收计算器。要完成的作业目标是：

编写一个提示用户输入以下信息的类：

备案状态:单身或结婚(单身填写1，结婚填写2)

应纳税所得额

计算和打印：

备案状态

应纳税所得额

联邦税

我应该对代码中包含的每个参数都有特定的计算，包括0到27050、27050到65500等等。我遇到的真正问题是，我似乎不能让数字真正显示出来。

我的代码如下：

import java.util.Scanner;
    public class P4_Icel_Murad_IRS
    {
        public static void main(String[] args){
            Scanner in = new Scanner(System.in);
            System.out.printf("Enter Marital Status: (Single = 1, Married = 2):");
            int relation = in.nextInt();
            System.out.printf("Enter taxable income:");
            int tax = in.nextInt();
            if (relation == 1){
                String status = "Single";
                if (tax <= 27050){
                    double tax2 = tax - 0.0;
                    double tax3 = (tax2 * 0.15);
                    System.out.printf(status,tax,tax3);
                }else if (27050 < tax && tax >= 65550){
                    double tax2 = (tax - 27050.0)* 0.275;
                    double tax3 = 4057.5 + tax2;
                }else if (65550 < tax && tax <= 136750){
                    double tax2 = (tax - 65550.0) * 0.305;
                    double tax3 = 14645.0 + tax2;
                }else if (136750 < tax && tax <= 297350){
                    double tax2 = (tax - 136750.0 - tax) * 0.355;
                    double tax3 = 36361.00 + tax2;
                }else if (297350 < tax && tax <= 1e100){
                    double tax2 = (tax - 297350) * 0.391;
                    double tax3 = 93374.0 + tax2;
                }
            }
                if (relation == 2){
                String status = "Married";
                if (tax <= 27050){
                    double tax2 = tax - 0.0;
                    double tax3 = (tax2 * 0.15);
                    System.out.printf(status,tax,tax3);
                }else if (27050 < tax && tax >= 65550){
                    double tax2 = (tax - 27050.0)* 0.275;
                    double tax3 = 4057.5 + tax2;
                }else if (65550 < tax && tax <= 136750){
                    double tax2 = (tax - 65550.0) * 0.305;
                    double tax3 = 14645.0 + tax2;
                }else if (136750 < tax && tax <= 297350){
                    double tax2 = (tax - 136750.0 - tax) * 0.355;
                    double tax3 = 36361.00 + tax2;
                }else if (297350 < tax && tax <= 1e100){
                    double tax2 = (tax - 297350) * 0.391;
                    double tax3 = 93374.0 + tax2;
                }
            }    

        }
    }

Answer 1

您将在单个if块中本地声明变量tax2 tax3。

您可以打印其中的一个块，但不是所有块。

将它们的声明移到

int tax = in.nextInt();
double tax2 = 0;
double tax3 = 0;

然后在所有逻辑的末尾打印出它们的值。