利用java创建一个计算器程序
时间: 2023-12-13 20:05:39 浏览: 20
好的,下面是一个简单的Java计算器程序的代码:
```java
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("Enter first number: ");
num1 = input.nextDouble();
System.out.print("Enter second number: ");
num2 = input.nextDouble();
System.out.print("Enter operator (+, -, *, /): ");
operator = input.next().charAt(0);
switch (operator) {
case '+':
result = num1 + num2;
System.out.printf("%.2f + %.2f = %.2f", num1, num2, result);
break;
case '-':
result = num1 - num2;
System.out.printf("%.2f - %.2f = %.2f", num1, num2, result);
break;
case '*':
result = num1 * num2;
System.out.printf("%.2f * %.2f = %.2f", num1, num2, result);
break;
case '/':
if (num2 == 0) {
System.out.println("Error: Division by zero");
} else {
result = num1 / num2;
System.out.printf("%.2f / %.2f = %.2f", num1, num2, result);
}
break;
default:
System.out.println("Error: Invalid operator");
break;
}
input.close();
}
}
```
运行程序,按照提示输入两个数字和操作符,程序会根据操作符执行相应的计算,并输出结果。注意,在除法运算中,需要判断除数是否为零,避免抛出异常。