让用户输入加法表达式 

package com.StringExcrise;

import java.util.Scanner;

public class demo04 {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        System.out.println("请输入表达式");
        String m = s.next();//6＋２　＋　１；
        m = m.replace(" ","");
        String[] ss = m.split("\\+");
        int sum = 0;
        for (int i = 0; i <ss.length ; i++) {
             int a = Integer.parseInt(ss[i]);
             sum += a;
        }
        System.out.println(sum);

    }
}
posted @ 2022-05-14 20:31  小松2739  阅读(15)  评论(0)  编辑  收藏  举报