生成计算器的java代码
时间: 2024-05-15 13:16:56 浏览: 7
这里提供一个简单的计算器程序的Java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("请输入第一个数字:");
num1 = scanner.nextDouble();
System.out.print("请输入运算符(+、-、*、/):");
operator = scanner.next().charAt(0);
System.out.print("请输入第二个数字:");
num2 = scanner.nextDouble();
switch (operator) {
case '+':
result = num1 + num2;
System.out.println(num1 + " + " + num2 + " = " + result);
break;
case '-':
result = num1 - num2;
System.out.println(num1 + " - " + num2 + " = " + result);
break;
case '*':
result = num1 * num2;
System.out.println(num1 + " * " + num2 + " = " + result);
break;
case '/':
if (num2 == 0) {
System.out.println("除数不能为0!");
break;
}
result = num1 / num2;
System.out.println(num1 + " / " + num2 + " = " + result);
break;
default:
System.out.println("无效的运算符!");
break;
}
scanner.close();
}
}
```
运行结果示例:
```
请输入第一个数字:3.14
请输入运算符(+、-、*、/):*
请输入第二个数字:5
3.14 * 5.0 = 15.7
```