Java 为什么'；我的if/else是否退出循环？

问题始于if声明（“您是否申请了本月的住房补贴？是/否”）； 从用户那里得到答案后，应用程序仍然会再次循环

为什么我的if/else不退出循环？ 我所有的逻辑都是正确的，除了if语句不会中断 我曾尝试使用break语句跳转if/else并停止无限运行代码，但它也不起作用

我错过了什么

   public static void main(String[] args) {

        double basic_salary, tax, KWSP, housing_allowance, holder;
        Scanner scan = new Scanner(System.in);
        String answer = null;

        System.out.println("Enter Basic Salary Of Employee: ");
        basic_salary = scan.nextDouble();

        do {

            if (basic_salary <= 6000 && basic_salary >= 1) {

                tax = 0.10 * basic_salary;
                System.out.println("The compulsory tax =  " + tax + " $");
                housing_allowance = 0.5 * basic_salary;
            } else if (basic_salary >= 6001 && basic_salary <= 10000) {

                tax = 0.20 * basic_salary;
                System.out.println("The compulsory tax =  " + tax + " $");
                housing_allowance = 0.5 * basic_salary;;
            } else if (basic_salary >= 10001 && basic_salary <= 14000) {

                tax = 0.25 * basic_salary;
                System.out.println("The compulsory tax =  " + tax + " $");
                housing_allowance = 0.3 * basic_salary;;
            } else {

                tax = 0.30 * basic_salary;
                System.out.println("The compulsory tax =  " + tax + " $");
                housing_allowance = 0.3 * basic_salary;;
            }


            System.out.println("Type the amount For KWSP contribution 11% or 13%  ONLY");
            KWSP = scan.nextDouble();
            holder = KWSP / 100;
            KWSP = holder * basic_salary;
            System.out.println("KWSP contribution= " + KWSP + " $");



            Scanner input = new Scanner(System.in);
            System.out.println("Did you apply for Housing Allowance allowance for this month? yes/no");
            answer = input.nextLine();

            if (answer.equalsIgnoreCase("yes")) {
                System.out.println("");
                System.out.println("");
                System.out.println("Housing Allowance: " + housing_allowance + " $");
                System.out.println("KWSP:contribution: " + KWSP + " $");
                System.out.println("Tax:contribution : " + housing_allowance + " $");
                System.out.println("Gross Salary Of Employee: " + (KWSP + housing_allowance + tax) + " $");
                System.out.println("");
                System.out.println("");


            } else if (answer.equalsIgnoreCase("no")) {
                System.out.println("");
                System.out.println("");
                System.out.println("KWSP:contribution: " + KWSP + " $");
                System.out.println("Tax:contribution : " + housing_allowance + " $");
                System.out.println("Gross Salary Of Employee: " + (KWSP + tax) + " /n");
                System.out.println("");
                System.out.println("");



            } else {
                break;
            }

        } while (basic_salary > 0); //while loop

        System.out.println("salary cannot be Zero or Negative");
    }
}

publicstaticvoidmain（字符串[]args）{
双倍基本工资、税收、KWSP、住房津贴、持有人；
扫描仪扫描=新扫描仪（System.in）；
字符串应答=null；
System.out.println（“输入员工基本工资：”）；
基本工资=scan.nextDouble（）；
做{
如果（基本工资=1）{
税费=0.10*基本工资；
System.out.println（“强制税=“+tax+”$”）；
住房津贴=0.5*基本工资；
}else if（basic_-salary>=6001&&basic_-salary=10001&&basic_-salary 0）；//while循环
System.out.println（“工资不能为零或负”）；
}
}

您正在输入

基本工资

，然后运行do-while循环，直到

基本工资>0

，并且不在任何地方修改

基本工资

在用户输入0或某个负值之前，此条件不会变为false

我不确定你想要实现什么，你的逻辑是什么。 如果您想在计算后简单地打印消息，那么您可以使用简单的If-else条件而不是do-while循环

也许是这样的：

if (basic_salary > 0) {
    //do your calculation and printing here
} else {
    //print basic_salary less than 0 error message
    System.out.println("salary cannot be Zero or Negative");
}

---

看看你的while声明，似乎你想在工资上涨时打破循环！=0

所以你可以改变你的状况，比如：

while !(basic_salary > 0); //while loop

也许在循环的开头写下你的

System.out.println

System.out.println("salary cannot be Zero or Negative");

---

我编辑了你的代码，现在就可以使用了。但不要只是盲目地使用它，试着阅读它并理解它为什么会起作用。 检查并进一步询问问题（如果有）

public static void main(String[] args) {

    double basic_salary, tax, KWSP, housing_allowance, holder;
    Scanner scan = new Scanner(System.in);
    String answer;

    do {
        System.out.println("Enter Basic Salary Of Employee: ");
        basic_salary = scan.nextDouble();
        if (basic_salary <= 0) {
            housing_allowance = 0;
            tax = 0;
            System.out.println("salary cannot be Zero or Negative");

        } else if (basic_salary <= 6000 && basic_salary >= 1) {

            tax = 0.10 * basic_salary;
            System.out.println("The compulsory tax =  " + tax + " $");
            housing_allowance = 0.5 * basic_salary;
        } else if (basic_salary >= 6001 && basic_salary <= 10000) {

            tax = 0.20 * basic_salary;
            System.out.println("The compulsory tax =  " + tax + " $");
            housing_allowance = 0.5 * basic_salary;
        } else if (basic_salary >= 10001 && basic_salary <= 14000) {

            tax = 0.25 * basic_salary;
            System.out.println("The compulsory tax =  " + tax + " $");
            housing_allowance = 0.3 * basic_salary;
        } else {

            tax = 0.30 * basic_salary;
            System.out.println("The compulsory tax =  " + tax + " $");
            housing_allowance = 0.3 * basic_salary;
        }
    }
    while (basic_salary <= 0);

    do {
        System.out.println("Type the amount For KWSP contribution 11% or 13%  ONLY");
        KWSP = scan.nextDouble();
    }
    while (!(KWSP == 11 || KWSP == 13));

    holder = KWSP / 100;
    KWSP = holder * basic_salary;
    System.out.println("KWSP contribution= " + KWSP + " $");

    do {
        System.out.println("Did you apply for Housing Allowance allowance for this month? yes/no");
        answer = scan.next();
    }
    while (!(answer.equals("yes") || answer.equals("no"))) ;

    if (answer.equalsIgnoreCase("yes")) {
        System.out.println("");
        System.out.println("");
        System.out.println("Housing Allowance: " + housing_allowance + " $");
        System.out.println("KWSP:contribution: " + KWSP + " $");
        System.out.println("Tax:contribution : " + housing_allowance + " $");
        System.out.println("Gross Salary Of Employee: " + (KWSP + housing_allowance + tax) + " $");
        System.out.println("");
        System.out.println("");
    } else if (answer.equalsIgnoreCase("no")) {
        System.out.println("");
        System.out.println("");
        System.out.println("KWSP:contribution: " + KWSP + " $");
        System.out.println("Tax:contribution : " + housing_allowance + " $");
        System.out.println("Gross Salary Of Employee: " + (KWSP + tax) + " /n");
        System.out.println("");
        System.out.println("");
    }
}

publicstaticvoidmain（字符串[]args）{
双倍基本工资、税收、KWSP、住房津贴、持有人；
扫描仪扫描=新扫描仪（System.in）；
字符串回答；
做{
System.out.println（“输入员工基本工资：”）；
基本工资=scan.nextDouble（）；
如果（basic_-salary=6001&&basic_-salary=10001&&basic_-salary），因为用户必须输入“是”或“否”以外的内容要让代码达到
中断
？这是一个你可以自己用调试器解决的问题，实际上比在这里提问更容易。不要在每次迭代中创建扫描仪处理系统。在main方法开始时创建一次，并在需要时使用它。但是在进入循环之前首先验证的是基本工资，如何我可以改变这个提示吗：如果您编写更小的函数并将它们组合在一起以实现所需的功能，您可能会发现调试更容易。您希望代码在哪一点或哪种情况下退出循环？