java控制台简易计算器（基本的加减乘除功能）

java控制台简易计算器（基本的加减乘除功能）

1.源代码

package base;

import java.util.Scanner;

public class Example {
    public static void main(String[] args) {
        //实现计算器功能
        Scanner scanner = new Scanner(System.in);
        boolean temp = true;
        while (temp){
            System.out.println("+------------+");
            System.out.println("|    计算器   |");
            System.out.println("|   1.加法    |");
            System.out.println("|   2.减法    |");
            System.out.println("|   3.乘法    |");
            System.out.println("|   4.除法    |");
            System.out.println("|   5.退出    |");
            System.out.println("+------------+");
            System.out.print("请输入选项：");

            int choice = scanner.nextInt();
            int a;
            int b;
            
            switch (choice) {
                case 1:
                    System.out.print("请输入第一个加数：");
                    a = scanner.nextInt();
                    System.out.print("请输入第二个加数：");
                    b = scanner.nextInt();
                    System.out.println("和为：" + add(a,b));
                    break;
                case 2:
                    System.out.print("请输入第一个减数：");
                    a = scanner.nextInt();
                    System.out.print("请输入第二个减数：");
                    b = scanner.nextInt();
                    System.out.println("差为：" + sub(a,b));
                    break;
                case 3:
                    System.out.print("请输入第一个乘数：");
                    a = scanner.nextInt();
                    System.out.print("请输入第二个乘数：");
                    b = scanner.nextInt();
                    System.out.println("积为：" +c(a,b) );
                    break;
                case 4:
                    System.out.print("请输入被除数：");
                    a = scanner.nextInt();
                    System.out.print("请输入除数：");
                    b = scanner.nextInt();
                    System.out.println("商为：" + chu(a,b));
                    break;
                case 5:
                    temp = false;
                    break;
                default:
                    System.out.println("输入有误");
              }
            }
        }


    public static double add(double a,double b){
        return a+b;
    }

    public static double sub(double a,double b){
        return a-b;
    }

    public static double c(double a, double b){
        return a*b;
    }

    public static double chu(double a, double b){
        return a/b;
    }
}

2.最终控制台演示

java基础
运用方法、控制台输入scanner、while循环、switch语句实现交互式简易计算器。