84 lines
2.5 KiB
Markdown
84 lines
2.5 KiB
Markdown
---
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title: 简单的Java加减乘除计算器(适合新手)
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date: 2020-05-30 22:59:13
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tags:
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- Java
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- 代码
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categories:
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- Java练习
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---
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本人Java新手一枚，刚学完Java数据类型、流程控制、数组、方法等基础语法知识。
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尝试写了一个简单的计算器，实现了加减乘除功能，并可以循环接收数据。
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代码有待改进，希望各位大佬多多指点 :beers:
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<!-- more -->
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```java
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public class calculator {
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public static void main(String[] args) {
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Scanner in = new Scanner(System.in);
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while(true){
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System.out.println("请输入需要计算的第一个数字");
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double a = in.nextDouble();
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System.out.println("请输入需要计算的第二个数字");
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double b = in.nextDouble();
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while(true) {
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System.out.println("请输入运算方式(+ - * /)");
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String operation = in.next();
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switch (operation) {
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case "+":
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System.out.println(add(a,b));
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break;
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case "-":
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System.out.println(subtraction(a, b));
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break;
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case "*":
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System.out.println(multiply(a, b));
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break;
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case "/":
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System.out.println(division(a, b));
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break;
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default:
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System.out.println("输入不正确，请重新输入");
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}
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break;
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}
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while (true) {
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System.out.println("是否继续使用? " + "YES/NO");
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String choose = in.next();
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if (choose.equals("YES")) {
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break;
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} else if (choose.equals("NO")) {
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System.out.println("欢迎下次使用，再见");
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return;
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} else {
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System.out.println("输入不正确，请重新输入");
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}
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}
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}
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}
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//加
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private static double add(double a,double b){
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return a+b;
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}
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//减
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private static double subtraction(double a,double b){
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return a-b;
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}
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//乘
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private static double multiply(double a,double b){
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return a*b;
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}
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//除
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private static double division(double a,double b){
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if(b==0){
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System.out.println("被除数不能为0");
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return 0 ;
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}
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return a/b;
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}
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}
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``` |