java设计简单的计算器
时间: 2023-07-24 21:00:05 浏览: 44
下面是一个简单的Java计算器的示例代码:
```java
import java.util.Scanner;
public class Calculator {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.println("请输入第一个数字:");
double num1 = scanner.nextDouble();
System.out.println("请输入第二个数字:");
double num2 = scanner.nextDouble();
System.out.println("请选择操作 (+, -, *, /):");
String operator = scanner.next();
double result = 0;
switch (operator) {
case "+":
result = num1 + num2;
break;
case "-":
result = num1 - num2;
break;
case "*":
result = num1 * num2;
break;
case "/":
result = num1 / num2;
break;
default:
System.out.println("无效操作符");
return;
}
System.out.println("结果: " + result);
}
}
```
运行程序后,您将被要求输入两个数字和一个操作符。根据您的选择,程序将执行加法,减法,乘法或除法,并输出结果。