java计算器程序代码
时间: 2023-10-11 14:25:35 浏览: 37
以下是一个简单的 Java 计算器程序代码,可以进行加、减、乘、除四则运算:
```
import java.util.Scanner;
public class Calculator {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
double num1, num2, result;
char operator;
System.out.print("请输入第一个数字: ");
num1 = input.nextDouble();
System.out.print("请输入运算符 (+, -, *, /): ");
operator = input.next().charAt(0);
System.out.print("请输入第二个数字: ");
num2 = input.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 '/':
result = num1 / num2;
System.out.println(num1 + " / " + num2 + " = " + result);
break;
default:
System.out.println("无效的运算符");
break;
}
}
}
```
该程序首先从用户那里获取两个数字和一个运算符,然后使用 switch 语句执行相应的运算,并输出结果至控制台。可以根据需要对代码进行修改和扩展。