Calculator_Switch JavaFundamental

Question

你好，我尝试过计算器的语法，用char表示操作数，但结果总是出错。我在用eclipse (露娜)。上面没有错误或警告信息。

语法

    Scanner in = new Scanner(System.in);
    int answer = 0;
    System.out.println("Enter a number:");
    int num1 = in.nextInt();
    System.out.println("Enter another number:");
    int num2 = in.nextInt();
    System.out.println("Enter the operand:");
    char input =(char) in.nextInt();
    switch (input){
    case'*':
        answer = num1 * num2;
        break;
    case '/':
        answer = num1/num2;
        break;
    case '%':
        answer = num1%num2;
        break;
    case '+':
        answer = num1 +num2;
        break;
    case '-':
        answer = num1-num2;
        break;
    default:
        System.out.println("Invalid Command");
    }
    System.out.println("The result is: " + answer);

调试

输入号码、另一个数字和一个操作数：

而错误是：

InputMismatchException

Answer 1

只需更改这一行：char input =(char) in.nextInt();，对于这个char input = in.next().charAt(0)...and，你就可以走了！