Subject_08.java

import java.util.Scanner;

public class Main {
    public static int taxRefund(int money){
        double tax = 0;
        double moneyAsDouble = (double) money;

            if (money > 1000000000){
                tax = moneyAsDouble * 0.45 - 65400000;
            } else if (money <= 1000000000 && money > 500000000) {
                tax = moneyAsDouble * 0.42 - 35400000;
            } else if (money <= 500000000 && money > 300000000) {
                tax = moneyAsDouble * 0.40 - 25400000;
            } else if (money <= 300000000 && money > 150000000) {
                tax = moneyAsDouble * 0.38 - 19400000;
            } else if (money <= 150000000 && money > 88000000) {
                tax = moneyAsDouble * 0.35 - 14900000;
            } else if (money <= 88000000 && money > 46000000) {
                tax = moneyAsDouble * 0.24 - 5220000;
            } else if (money <= 46000000 && money > 12000000) {
                tax = moneyAsDouble * 0.15 - 1080000;
            }else {
                tax = moneyAsDouble * 0.06;
            }
        int taxAsTaxRounded = (int) Math.round(tax);

        return taxAsTaxRounded;
    }

    public static void main(String[] args) {
        double[] taxList = {0.06, 0.15, 0.24, 0.35, 0.38, 0.40, 0.42, 0.45};
        int[] taxMoney = {12000000, 34000000, 42000000, 62000000, 150000000,200000000,500000000};

        Scanner scanner = new Scanner(System.in);
        System.out.println("[과세금액 계산 프로그램]");
        System.out.print("연소득을 입력해 주세요.:");
        int money = scanner.nextInt();


        double tax = 0;
        int taxAsInt = 0;
        int taxRate = 0;
        int taxAsTax = 0;
        int taxAsRefund = 0;
        taxAsRefund = taxRefund(money);

        if (money <= 12000000) {
            tax = money * 0.06;
            taxAsInt = (int)tax;
            taxAsTax += taxAsInt;
            System.out.printf("  %d * 6%% = %d\n",money, taxAsInt);
            System.out.println();

        }else{

            for (int i = 0; i < taxList.length; i++) {

                if(money > 12000000 && i < 7) {

                    tax = taxMoney[i] * taxList[i];
                    taxAsInt = (int) tax;
                    money -= taxMoney[i];
                    taxAsTax += taxAsInt;
                    taxRate = (int) (taxList[i] * 100);
                    System.out.printf("  %12d * %2d%% = %9d\n", taxMoney[i], taxRate, taxAsInt);

                } else if (money ==0) {
                    break;
                }else {
                    tax = money * taxList[i];
                    taxAsInt = (int)tax;
                    taxAsTax += taxAsInt;
                    taxRate = (int)(taxList[i] * 100);
                    System.out.printf("  %12d * %2d%% = %9d\n",money,taxRate, taxAsInt);
                    break;
                }
            }
        }


        System.out.printf("[세율에 의한 세금]:             %d\n", taxAsTax);
        System.out.printf("[누진공제 계산에 의한 의한 세금]:  %d\n", taxAsRefund);



    }




}