第三章第十三题（金融应用：计算税款）(Financial application: compute taxes)

    package chapter03;
    
    import java.util.Scanner;
    
    public class Code_13 {
    public static void main(String[] args) {
        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), 2-married separately, 3-head of " +
                "household) 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 or qualifying widow(er)
            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);
    
        input.close();
    }
    }
    
    
    
    java
    
    
![](https://ad.itadn.com/c/weblog/blog-img/images/2025-07-13/biPCm49Ez0XgLxo3VHp12aqhkUjs.png)

    (0-single filer, 1-married jointly or qualifying widow(er), 2-married separately, 3-head of household) Enter the filing status: 0
    Enter the taxable income: 10000
    Tax is 1082.5
    
    Process finished with exit code 0
    
    
    
    java