Java初步－将输入整数的每位独立取出，并计算各位数字之和

使用Java实现：将输入整数的每一位单独取出显示，并倒序显示和计算各位数字之和。

学习编程最重要的就是实现方案设计。每一个小程序也要如此，才能不断进步。

import java.util.Scanner;

public class pro {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in); // 实例化

        for (;;) {
            System.out.print("要输入的整数的位数（9以内，0－退出）：");
            int iN = scanner.nextInt();
            if (iN == 0) {
                System.out.println("结束！");
                break;
            }
            int iAr[] = new int[iN];
            int iNum, iNum1 = 0, iSum = 0;
            do {
                System.out.print("输入整数：");
                iNum = scanner.nextInt();
                if (iNum - Math.pow(10, iN) >= 0)
                    System.out.println("输入的整数超长！重新输入！");
                else
                    break;
            } while (true);
            // %: 12345 %100000=2345
            iN=String.valueOf(iNum).length();
            for (int i = 0; i                 iAr[i] = (int) (iNum / Math.pow(10, iN - 1 - i));
                iNum = iNum - (int) (iAr[i] * Math.pow(10, iN - 1 - i));
            }
            System.out.print("输入的整数数字是： ");
            for (int i = 0; i < iN; i++) {
                iNum1 += iAr[i] * Math.pow(10, i);
                iSum += iAr[i];
                System.out.print(iAr[i] + "   ");
            }
            System.out.print("各位数字倒序排列：" + iNum1 + "   ");
            System.out.println("各位数字之和＝" + iSum);

        }
        scanner.close();
    }
}