异常1

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入数字给第一个加数赋值：");
        int num1 = 0;
        try {
            num1 = sc.nextInt();
        } catch (Exception ex) {
            System.out.println("输入的信息中出现数字以外的其他字符。");
        }
        int num2 = 123;
        System.out.println(num1 + "+" + num2 + "=" + (num1 + num2));

    }