简易计算器的制作

思路

1. 写4个方法
2. 利用循环+switch进行交互
3. 传递需要操作的2个数
4. 输出结果

代码

package com.yicurtain.way;

import java.util.Scanner;

public class capulate {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入要计算的值：");
        while(scanner.hasNextDouble()){
            double a = scanner.nextDouble();//定义一个输入值的类型
            String b =scanner.next();
            double c = scanner.nextDouble();
            switch (b){
                case "+":
                    add(a,c);
                    break;
                case "-":
                    jian(a,c);
                    break;
                case "*":
                    mulp(a,c);
                    break;
                case "/":
                    chu(a,c);
                    break;

            }
        }
        scanner.close();

    }
          public static void add(double num1,double num2){
              System.out.println(num1+num2);
          }
          public static double jian(double num1,double num2){
              System.out.println(num1-num2);
             return num1-num2;
    }
          public static double mulp(double num1,double num2){
              System.out.println(num1*num2);
             return num1*num2;
    }
          public static double chu(double num1,double num2){
              System.out.println(num1/num2);
             return num1/num2;
    }

    }