package com.yupei.constract.test;
import java.util.Scanner;
public class caculate {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);String next;
do {
System.out.println("请输入数字来进行运算吧!");
double m = scanner.nextFloat(); //获取第一个数字
String x = scanner.next(); //获取加减乘除符号
double n = scanner.nextDouble(); // 获取第二个数字
double result; //存储运算结果switch (x) {
case "+":
result = m + n;
System.out.println("加法运算的结果是:" + result);
break;
case "-":
result = m - n;
Sy