Java版计算器(两数运算/循环接收数据/scanner用户交互)

package com.method;

import java.util.Scanner;

public class Demo03_Calculator {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Demo03_Calculator demo03 = new Demo03_Calculator();

        while(true){    //这里Java中的while不能用0/1表示,只能用布尔值表示
            char c=scanner.next().charAt(0);
            double m= scanner.nextDouble();
            double n= scanner.nextDouble();

            demo03.cal(c,m,n);
        }

    }
    public void cal(char c,double...i){
        switch (c){
            case '+':
                System.out.println(i[0]+i[1]);
                break;
            case '-':
                System.out.println(i[0]-i[1]);
                break;
            case '*':
                System.out.println(i[0]*i[1]);
                break;
            case '/':
                System.out.println(i[0]/i[1]);
                break;
            default:
                break;
        }

    }
}