写一个四则运算的java程序
时间: 2024-05-03 15:21:41 浏览: 10
```
import java.util.Scanner;
public class Calculator {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
System.out.print("请输入第一个数:");
double num1 = scanner.nextDouble();
System.out.print("请输入运算符(+、-、*、/):");
String operator = scanner.next();
System.out.print("请输入第二个数:");
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 "/":
result = num1 / num2;
break;
default:
System.out.println("运算符输入错误!");
return;
}
System.out.println("运算结果为:" + result);
}
}
```
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