java簡(jiǎn)易計(jì)算機(jī)代碼怎么寫(xiě)

下面是一個(gè)簡(jiǎn)單的Java計(jì)算器代碼示例，可以實(shí)現(xiàn)基本的加、減、乘、除運(yùn)算：

import java.util.Scanner;

public class SimpleCalculator {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        
        System.out.println("請(qǐng)輸入第一個(gè)數(shù)字：");
        double num1 = scanner.nextDouble();

        System.out.println("請(qǐng)輸入運(yùn)算符（+、-、*、/）：");
        char operator = scanner.next().charAt(0);

        System.out.println("請(qǐng)輸入第二個(gè)數(shù)字：");
        double num2 = scanner.nextDouble();

        double result = 0;

        switch(operator) {
            case '+':
                result = num1 + num2;
                break;
            case '-':
                result = num1 - num2;
                break;
            case '*':
                result = num1 * num2;
                break;
            case '/':
                if(num2 != 0) {
                    result = num1 / num2;
                } else {
                    System.out.println("除數(shù)不能為0！");
                    return;
                }
                break;
            default:
                System.out.println("無(wú)效的運(yùn)算符！");
                return;
        }

        System.out.println("計(jì)算結(jié)果為：" + result);
    }
}

你可以在控制臺(tái)輸入兩個(gè)數(shù)字和一個(gè)運(yùn)算符，程序?qū)⒏鶕?jù)你輸入的運(yùn)算符進(jìn)行相應(yīng)的計(jì)算并輸出結(jié)果。希望這個(gè)示例對(duì)你有所幫助。