java - 在 Java 中用字符串重复整个循环很困难

Question

我是编程新手，我开始练习 Java。在我的练习中，我要求编写一个程序来计算并打印出数字的数字之和。然后它打印出和数的所有除数。

问题是，在那之后，我需要询问用户是否想尝试另一个号码，当用户回答"is"时，我无法重新启动程序。谢谢你，对不起我的英语!

//Introduction
        System.out.println("\nWelcome to our Calculation Program!\n----------------------------------------");



        System.out.print("Enter a number with at most 7-digits:");
        int input = mykeyboard.nextInt();
        int sum = 0;


        while (input > 0) {
            int add = input % 10;
            sum = sum + add;
            input = input / 10;


        }
        System.out.println("Sum of the digits of your input is: " + sum);
        System.out.print("The divisors of " + sum + " are as follows: " );
        for (int counter = 1; sum >= counter; counter++) {
            if (sum % counter == 0)
        System.out.print(counter + " ");





    } 

        System.out.println("\n\nDo you want to try another number?");
        Scanner mykeyboard2 = new Scanner(System.in);
        String choice = mykeyboard2.nextLine();

        if (choice.equals("yes")) {
            System.out.println("Enter a number with a most 7-digits:");

            while (input > 0);
                int add = input % 10;
                sum = sum + add;
                input = input / 10;

                System.out.println("Sum of the digits of your input is: " + sum);
                System.out.print("The divisors of " + sum + " are as follows: " );
                for (int counter = 1; sum >= counter; counter++)
                    if (sum % counter == 0)
                        System.out.print(counter + " ");

} if (choice.equals("no")) {

System.out.println("Thanks and Have a Great Day!");

Answer 1

您只需完成循环即可重新启动

        System.out.print("Enter a number with at most 7-digits:");
    int input = mykeyboard.nextInt();
    while(input != -1){
    int sum = 0;
        int add = input % 10;
        sum = sum + add;
        input = input / 10;



    System.out.println("Sum of the digits of your input is: " + sum);
    System.out.print("The divisors of " + sum + " are as follows: " );
    for (int counter = 1; sum >= counter; counter++) {
        if (sum % counter == 0)
    System.out.print(counter + " ");
    System.out.print("Do you want another number? If you dont type -1: ");
    input = mykeyboard.nextInt();
    }

代码将继续执行，直到用户输入 -1