用JAVA写一个计算器程序
时间: 2023-11-24 17:06:15 浏览: 34
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("请输入运算符号(+、-、*、/):");
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("结果为:" + result);
break;
case '-':
result = num1 - num2;
System.out.println("结果为:" + result);
break;
case '*':
result = num1 * num2;
System.out.println("结果为:" + result);
break;
case '/':
if (num2 == 0) {
System.out.println("除数不能为0!");
} else {
result = num1 / num2;
System.out.println("结果为:" + result);
}
break;
default:
System.out.println("输入的运算符号有误!");
break;
}
}
}