嘗試使用 int Java 反轉 123 _> 321

Question

我的任務是創建一個方法，該方法將從用戶那里獲取 3 位數字輸入並反轉其順序，然后以新的順序將其返回，而不將任何內容轉換為字符串，所有內容都保留為 int。 我無法弄清楚如何在不將值相加的情況下返回新數字（第一第二第三）；

public class Lab01
{

   public int sumTheDigits(int num)
   {
      int one;
      int two;
      int three;

      one = num % 10;
      two = (num/10) % 10;
      three = num / 100;

      return one + two + three;
   }

   public int reverseTheOrder(int num)
   {
      int first;
      int second;
      int third;

      third = num / 100;
      second = (num/10) % 10;
      first = num % 10;


      return ?;
   }

   public static void main(String[] args)
   {
      Scanner input = new Scanner(System.in); 

      Lab01 lab = new Lab01();
      System.out.println("Enter a three digit number: ");
      int theNum = input.nextInt();
      int theSum = lab.sumTheDigits(theNum);
      int theReverse = lab.reverseTheOrder(theSum);

      System.out.println("The sum of the digits of " + theNum + " is " + theSum);
      System.,out.println(theNum + " reversed is " + theReverse);



   }

}

Answer 1

您可以嘗試以下任何數字長度

public static void main(String args[]) {
        int num = 0;
        int reversenum = 0;
        System.out.println("Enter number: ");
        Scanner in = new Scanner(System.in);
        num = in.nextInt();
        while (num != 0) {
            reversenum = reversenum * 10;
            reversenum = reversenum + num % 10;
            num = num / 10;
        }

        System.out.println("Reverse number is: " + reversenum);
    }