简易计算器

谁借莪１个温暖的怀抱￠ 2024-03-27 13:51 67阅读 0赞

### 要求 ###

*  写-一个计算器，要求实现加减乘除功能，并且能够循环接收新的数据，通过用户交互实现。
 *  思路推荐:
    
     *  写4个方法: 加减乘除
     *  利用循环+ switch进行用户交互
     *  传递需要操作的两个数
     *  输出结果

### 基本运算方法 ###

package com.wang.method;
    
    public class BasicCalculations {
        
        //加法    add
        public static double add(double... b){
        
            double result = 0;
            for (int i = 0; i < b.length; i++) {
        
                result = result + b[i];
            }
            return result;
        }
        //减法    sub
        public static double sub(double a,double... b){
        
            double result = a;
            for (int i = 0; i < b.length; i++) {
        
                result = result - b[i];
            }
            return result;
        }
        //乘法 mcl
        public static double mcl(double... b){
        
            double result = 1;
            for (int i = 0; i < b.length; i++) {
        
                result = result * b[i];
            }
            return result;
        }
        //除法    div
        public static double div(double a,double... b){
        
            double result = a;
            for (int i = 0; i < b.length; i++) {
        
                if (b[i] == 0){
        
                    System.out.println("除数不能为0！");
                }else {
        
                result = result / b[i];
                }
            }
            return result;
        }
    }

### 简易计算器代码 ###

package com.wang.homework;
    
    import java.util.Scanner;
    
    import static com.wang.method.BasicCalculations.*;
    
    public class Calculate {
        
        public static void main(String[] args) {
        
            double result = 0;
            Scanner scanner = new Scanner(System.in);
            System.out.println("请输入第一个数:");
            while (scanner.hasNextDouble()){
        
               double a = scanner.nextDouble();
                System.out.println("请输入运算符：");
                String basicc = scanner.next();
                System.out.println("请输入第二个数：");
                double b = scanner.nextDouble();
                switch (basicc){
        
                    case "+":
                        result = add(a,b);
                        break;
                    case "-":
                        result = sub(a,b);
                        break;
                    case "*":
                        result = mcl(a,b);
                        break;
                    case "/":
                        result = div(a,b);
                        break;
                    default:
                        System.out.println("输入错误！");
                        break;
                }
                System.out.println("输入任意字母结束输入！");
            }
            System.out.println("运算结果为："+result);
            System.out.println("感谢使用！");
            scanner.close();
        }
    }

### 输出样式 ###

![在这里插入图片描述][77093a8ac3934f65b6b60591054973dd.png]

[77093a8ac3934f65b6b60591054973dd.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/03/27/54741bd0e2854b78876b932b974cafb9.png