简单计算器

package com.qiqi.method;

import java.util.Scanner;



public class Calculator {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入第一个数据：");
        while (scanner.hasNextDouble()){
            double a = scanner.nextDouble();
            System.out.println("请输入第一个运算符：");
            String c = scanner.next();
            System.out.println("请输入第二个数据：");
            double b = scanner.nextDouble();

            switch (c){
                case "+":
                    add(a,b);
                    break;
                case "-":
                    minus(a,b);
                    break;
                case "*":
                    multiply(a,b);
                    break;
                case "/":
                    except(a,b);
                    break;
            }
            System.out.println("继续计算请继续输入下一个数字" + "\n"+ "=======" + "\n" + "退出请输入任意字母！");
        }
        scanner.close();
    }

    public static void add(double num1,double num2){
        System.out.println(num1 + num2);
    }

    public static void minus(double num1,double num2){
        System.out.println(num1 - num2);
    }

    public static void multiply(double num1,double num2){
        System.out.println(num1 * num2);
    }

    public static void except(double num1,double num2){
        if (num2==0){
            System.out.println("分母不能为零！");
        }else {
        System.out.println(num1 / num2);
        }
    }
}


//    写了加减乘除的4个方法
//    循环 + switch  用户交互
//    传递需要操作的两个数
//    输出结果
//根据  https://www.cnblogs.com/tuyin/p/15550360.html  学习

标签：num1,num2,double,计算器,System,简单,println,out
来源： https://www.cnblogs.com/shuqiqi/p/16421783.html