输入正整数n，求各位数字和

Posted 2021-02-12 liberhome

import java.util.Scanner;

/**
 * @author：（LiberHome）
 * @date：Created in 2019/3/5 10:24
 * @description：
 * @version:$
 */
/*输入正整数n，求各位数字和*/
public class page1401 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入一个整数");
        int inputNum = scanner.nextInt();
        int result=sumEach(inputNum);
        System.out.println("各位数字和是 ："+result);
    }

    private static int sumEach(int num) {
        int answer = 0;
        int size = 1;
        int temp = num;
        while (temp / 10 != 0) {
            size++;
            temp = temp / 10;
        }
        /*新建一个数组A,挨个赋值*/
        int[] A = new int[size];
        for (int i = 0; i < size && num / 10 != 0; i++) {
            A[i] = num % 10;
            num/=10;
            if (num<10){
                A[i+1]=num;
            }
        }
        /*计算各位数的和*/
        for (int i = 0; i < size; i++) {
            answer+=A[i];
        }
        return answer;
    }
}