计算器java
时间: 2023-08-22 07:07:09 浏览: 66
以下是一个简单的计算器 Java 代码示例:
```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 second number: ");
num2 = scanner.nextDouble();
System.out.print("Enter operator (+, -, *, /): ");
operator = scanner.next().charAt(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("Invalid operator!");
return;
}
System.out.println(num1 + " " + operator + " " + num2 + " = " + result);
}
}
```
这个程序可以让用户输入两个数字和一个运算符,然后计算并输出结果。注意,此示例未包括输入验证和错误处理等功能。
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