加法导师计划无法正常工作***阅读说明***

Question

以下是名为“Addition Tutor”的程序的代码。该程序生成2个随机数，并请求用户回答两个随机数的加法。问题是每次我正确回答问题时，消息框都会返回else动作（“不正确”）。我的程序有什么问题？请保持答案简单，我的编程知识和术语非常有限。非常感谢您的帮助！

namespace Addition_Tutor
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            //Create a random object.
            Random rand = new Random();
            {
                //Declare an Integer
                int number1;

                //Generate a random integer and assign it to number1
                number1 = rand.Next(400) + 100;

                //Send random number to numberlabel1
                numberLabel1.Text = Convert.ToString(number1);
            }
            {
                //Declare an Int Variable
                int number2;

                //Generate a random integer and assign it to number2
                number2 = rand.Next(400) + 100;

                //Send random number to numberlabel2
                numberLabel2.Text = Convert.ToString(number2);
            }
        }

        private void checkButton_Click(object sender, EventArgs e)
        {

                //declare an Int Variable for Correct Answer
                int correctAnswer;
                correctAnswer = Convert.ToInt32("" + numberLabel1.Text + numberLabel2.Text);

            //check to see if the userAnswer and correctAnswer match.
            int userAnswer;
            userAnswer = Convert.ToInt32(answerTextBox.Text);

            if (userAnswer == correctAnswer)
            {
                MessageBox.Show("Your Answer is Correct");
            }
            else
            {
                MessageBox.Show("Your Answer is Incorrect");
            }
        }
        private void clearButton_Click(object sender, EventArgs e)
        {
            //clear the labels and textboxes.
            numberLabel1.Text = "";
            numberLabel2.Text = "";
            answerTextBox.Text = "";
        }

        private void exitButton_Click(object sender, EventArgs e)
        {
            //close the form
            this.Close();
        }
    }
}

Answer 1

correctAnswer = Convert.ToInt32("" + numberLabel1.Text + numberLabel2.Text);

你正在“连接”两个数字。与"1" + "2" = "12"一样。

在添加之前，您需要将它们解析为int：

correctAnswer = int.Parse(numberLabel1.Text) + int.Parse(numberLabel2.Text);