j ava简易计算器
时间: 2023-10-22 10:13:42 浏览: 32
以下是一个简单的 Java 计算器示例代码:
```java
import java.util.Scanner;
public class Calculator {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
double num1, num2, result;
char operator;
System.out.print("Enter first number: ");
num1 = scanner.nextDouble();
System.out.print("Enter operator (+, -, *, /): ");
operator = scanner.next().charAt(0);
System.out.print("Enter second number: ");
num2 = scanner.nextDouble();
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("Invalid operator");
return;
}
System.out.println(num1 + " " + operator + " " + num2 + " = " + result);
}
}
```
该程序会提示用户输入两个数字和一个操作符,然后根据操作符执行相应的计算并输出结果。