编写四则运算Java代码
时间: 2023-07-02 11:05:04 浏览: 43
以下是一个简单的四则运算 Java 代码示例:
```java
import java.util.Scanner;
public class ArithmeticOperations {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
System.out.print("Enter the first number: ");
double num1 = input.nextDouble();
System.out.print("Enter the second number: ");
double num2 = input.nextDouble();
System.out.println("Select an operator (+, -, *, /): ");
char operator = input.next().charAt(0);
double result;
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 '/':
result = num1 / num2;
System.out.println(num1 + " / " + num2 + " = " + result);
break;
default:
System.out.println("Invalid operator!");
break;
}
}
}
```
在这个例子中,我们使用了 `Scanner` 类来从用户那里获取输入。然后,我们要求用户输入两个数字和运算符。使用 `switch` 语句来对不同的运算符进行处理,并计算结果。最后,将结果输出到控制台上。